Re: OT: e-mail reply to old/archived message

[nagia . retsina]

Τη Τετάρτη, 12 Ιουνίου 2013 9:36:41 π.μ. UTC+3, ο χρήστης Phil Connell έγραψε:
> On 12 Jun 2013 02:20,  wrote:
> 
> >
> 
> > How can i be able to answer you guys posts by my mail client?
> 
> Don't delete mails that you might want to reply to. 
> 
> If you do anything else, you're just making it difficult for yourself.
> 
> Cheers, 
> 
> Phil
> 
> > --
> 
> > http://mail.python.org/mailman/listinfo/python-list

i installed pan for windows just now, lets hpe it will be a workign alternative.
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Modify code with AST

[Ronny Mandal]

Hello,

I am trying to write a script which will parse a code segment (with 
ast.parse()), locate the correct function/method node (by name) in the 
resulting tree and replace this function (node) with another function (node), 
e.g.:

MyMod1.py:

class FooBar():
  def Foo(self): #I want to replace this and only this
return 1

  def Bar(self):
return 2

Here is the parser-class:

class FindAndTransform(NodeTransformer):
  """Visit the function and check name"""
  def visit_FunctionDef(self, node):
if node.name == 'Foo': #Only replace if name is "Foo"
  #Create a new function and assign it to node
  node = parse('''
def add(n, m):
  return n + m
''')
  return node

When I run the parser on MyMod1.py and generate code (with codegen), the output 
is:

class FooBar():
  def add(n, m):
return n + m

i.e. both methods are replaced. It seems like "node" in the parser contains all 
method bodies of class FooBar, not only Foo. When ran through a debugger, it 
iterates both methods. What I really wanted to do, was to replace only one 
method (Foo) and leave the other untouched.

I hope this was understandable conveyed.


Answers are highly appreciated.

Regards,

Ronny Mandal
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Re: ValueError: I/O operation on closed file. with python3

[Peter Otten]

Adam Mercer wrote:

> Hi
> 
> I'm trying to update one of my scripts so that it runs under python2
> and python3, but I'm running into an issue that the following example
> illustrates:
> 
> $ cat test.py
> try:
>   # python-2.x
>   from urllib2 import urlopen
>   from ConfigParser import ConfigParser
> except ImportError:
>   # python-3.x
>   from urllib.request import urlopen
>   from configparser import ConfigParser
> 
> server='http://www.lsc-group.phys.uwm.edu/~ram/files'
> 
> fp = urlopen('%s/latest.ini' % server).fp
> cp = ConfigParser()
> cp.readfp(fp)
> print(cp.get('version', '10.8'))
> $
> 
> This works as expected when using python2:
> 
> $ python2.7 test.py
> 5.2.10
> $
> 
> but when using python3 I receive the following error:
> 
> $ python3.3 test.py
> Traceback (most recent call last):
>   File "test.py", line 14, in 
> cp.readfp(fp)
>   File
>   
"/opt/local/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/configparser.py",
> line 753, in readfp
> self.read_file(fp, source=filename)
>   File
>   
"/opt/local/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/configparser.py",
> line 708, in read_file
> self._read(f, source)
>   File
>   
"/opt/local/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/configparser.py",
> line 1010, in _read
> for lineno, line in enumerate(fp, start=1):
> ValueError: I/O operation on closed file.
> $
> 
> Is there a way to get this working in both python2 and python3?
> 
> This is a small script and I'm starting to have some users wanting to
> use python3 and others sticking to python2 so I'd like to accommodate
> them both if possible.

Python 3.3.0 (v3.3.0:bd8afb90ebf2, Sep 30 2012, 14:49:00) 
[GCC 4.6.1] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from urllib.request import urlopen
>>> url = "http://www.lsc-group.phys.uwm.edu/~ram/files/latest.ini";
>>> fp = urlopen(url).fp
>>> fp.read()
Traceback (most recent call last):
  File "", line 1, in 
ValueError: read of closed file
>>> resp = urlopen(url)
>>> resp.fp.read()
b'[version]\n10.5 = 5.2.4\n10.6 = 5.2.10\n10.7 = 5.2.10\n10.8 = 5.2.10\n'

I don't know whether this behaviour is intentional or accidental (I assume 
the latter).

I then ran into another problem:

>>> from configparser import ConfigParser
>>> p = ConfigParser()
>>> resp = urlopen(url)
>>> p.readfp(resp.fp)
Traceback (most recent call last):
  File "", line 1, in 
  File "/usr/local/lib/python3.3/configparser.py", line 754, in readfp
self.read_file(fp, source=filename)
  File "/usr/local/lib/python3.3/configparser.py", line 709, in read_file
self._read(f, source)
  File "/usr/local/lib/python3.3/configparser.py", line 1011, in _read
if line.strip().startswith(prefix):
TypeError: startswith first arg must be bytes or a tuple of bytes, not str

So ConfigParser.readfp() (which has been deprecated in favour of 
read_file(), btw.) expects a text file:

>>> from io import TextIOWrapper
>>> resp = urlopen(url)
>>> p.readfp(TextIOWrapper(resp.fp))
>>> p.get("version", "10.8")
'5.2.10'

Applying these findings to your script:

from contextlib import contextmanager
try:
  # python-2.x
  from urllib2 import urlopen
  from ConfigParser import ConfigParser

  @contextmanager
  def my_urlopen(url):
  yield urlopen(url).fp

except ImportError:
  # python-3.x
  from urllib.request import urlopen
  from configparser import ConfigParser
  import io

  @contextmanager
  def my_urlopen(url):
  resp = urlopen(url)
  yield io.TextIOWrapper(resp.fp)

server='http://www.lsc-group.phys.uwm.edu/~ram/files'

cp = ConfigParser()
with my_urlopen('%s/latest.ini' % server) as fp:
cp.readfp(fp)

print(cp.get('version', '10.8'))

I've run it with 2.6, 2.7, 3.2, and 3.3. 


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Re: PyGame tutorial?

[Larry Hudson]

On 06/11/2013 08:47 AM, Eam onn wrote:

Is there a PyGame tutorial out there? I've seen TheNewBoston's tuts, but he 
didn't finish his. MetalX100 did a VERY good tutorial. I've been having trouble 
with some player movement because he isn't moving smoothly, he jumps. If I add 
5 pixels to his X position if I press a button, jumps to the next 5 pixels 
instead of smoothly moving. If I just add 5 pixels normally, he moves smooth.

Thanks! Any help is appreciated!


I posted this link before, but here it is again...

http://inventwithpython.com/pygame/

for the book "Making Games with Python & Pygame"

You can buy the dead-tree version, Or you can read it on-line for free, Or download the pdf or 
ebook versions for free.


 -=- Larry -=-

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Re: A certainl part of an if() structure never gets executed.

[Νικόλαος Κούρας]

On Tue, 11 Jun 2013 22:49:05 -0600, Michael Torrie wrote:

> What do each of these functions return?  When you print out
> re.search('=', name) what happens?

First of all i have changed the code to the following because using a 
regex 
to detect a single char was an overkill.

if '=' not in name and '=' not in month and '=' not in year:
cur.execute( '''SELECT * FROM works WHERE clientsID = (SELECT id 
FROM clients WHERE name = %s) and MONTH(lastvisit) = %s and YEAR
(lastvisit) 
= %s ORDER BY lastvisit ASC''', (name, month, year) )
elif '=' not in month and '=' not in year:
cur.execute( '''SELECT * FROM works WHERE MONTH(lastvisit) = %s 
and YEAR(lastvisit) = %s ORDER BY lastvisit ASC''', (month, year) )
elif '=' not in year:
cur.execute( '''SELECT * FROM works WHERE YEAR(lastvisit) = %s 
ORDER BY lastvisit ASC''', year )
else:
print( 'Πώς να γίνει αναζήτηση αφού δεν 
επέλεξες ούτε πελάτη ούτε μήνα ή τουλάχιστον το έτος?' )
print( '' )
sys.exit(0)


Here is the definements of those varibles. as you can see are all tuples

# populate names, months, years
names.add( '==' )
months = ( '==', 'Ιανουάριος', 'Φεβρουάριος', 'Μάρτιος', 
'Απρίλιος', 'Μάϊος', 'Ιούνιος',
   'Ιούλιος', 'Αύγουστος', 'Σεπτέμβριος', 'Οκτώβριος', 
'Νοέμβριος', 
'Δεκέμβριος' )
years = ( '==', 2010, 2011, 2012, 2013 )




i used  print( name, month, year ) and noticed that all values returned as 
expected when selected fro drop-down menus and submitted.

But when it comes to select '==' form month instead of 
'==' to be submitted a zero gets submitted and i think the problem 
is the way i'm filling up months into the drop down menu which is:


for i, month in enumerate(months):
print(' %s ' % (i, month) )


the if case does not execute because of the way it checks for None entry 
which is: elif '=' not in year:

but if enumerate yields 0 instead of '==' then elif '=' not in 
year of course fails.

So, i must tell:

for i, month in enumerate(months):
print(' %s ' % (i, month) )

to somehow return '==' instead of 0 but dont know how.



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Re: A certainl part of an if() structure never gets executed.

[Chris Angelico]

On Wed, Jun 12, 2013 at 5:45 PM, Νικόλαος Κούρας  wrote:
> First of all i have changed the code to the following because using a
> regex
> to detect a single char was an overkill.
>
> if '=' not in name and '=' not in month and '=' not in year:

It'd be courteous to acknowledge those who made that suggestion, most
notably alex23 who posted it in almost that exact form.

ChrisA
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Turnign greek-iso filenames => utf-8 iso

[Νικόλαος Κούρας]

#
# Collect directory and its filenames as bytes
path = b'/home/nikos/public_html/data/apps/'
files = os.listdir( path )

for filename in files:
# Compute 'path/to/filename'
filepath_bytes = path + filename

for encoding in ('utf-8', 'iso-8859-7', 'latin-1'):
try: 
filepath = filepath_bytes.decode( encoding )
except UnicodeDecodeError:
continue

# Rename to something valid in UTF-8 
if encoding != 'utf-8': 
os.rename( filepath_bytes, filepath.encode('utf-8') 
)

assert os.path.exists( filepath.encode('utf-8') )
break 
else: 
# This only runs if we never reached the break
raise ValueError( 'unable to clean filename %r' % 
filepath_bytes ) 


# Collect filenames of the path dir as strings
filenames = os.listdir( '/home/nikos/public_html/data/apps/' )

# Build a set of 'path/to/filename' based on the objects of path dir
filepaths = set()
for filename in filenames:
filepaths.add( filename )

==
# Load'em
for filename in filenames:
try:
# Check the presence of a file against the database and 
insert if it doesn't exist
cur.execute('''SELECT url FROM files WHERE url = %s''', 
filename )
data = cur.fetchone()


[Wed Jun 12 10:56:56 2013] [error] [client 79.103.41.173] Traceback (most 
recent call last):, referer: http://superhost.gr/
[Wed Jun 12 10:56:56 2013] [error] [client 79.103.41.173]   File "/home/
nikos/public_html/cgi-bin/files.py", line 102, in , referer: 
http://superhost.gr/
[Wed Jun 12 10:56:56 2013] [error] [client 79.103.41.173] print
( filename ), referer: http://superhost.gr/
[Wed Jun 12 10:56:56 2013] [error] [client 79.103.41.173]   File "/usr/
local/lib/python3.3/codecs.py", line 355, in write, referer: http://
superhost.gr/
[Wed Jun 12 10:56:56 2013] [error] [client 79.103.41.173] data, 
consumed = self.encode(object, self.errors), referer: http://superhost.gr/
[Wed Jun 12 10:56:56 2013] [error] [client 79.103.41.173] 
UnicodeEncodeError: 'utf-8' codec can't encode character '\\udcce' in 
position 0: surrogates not allowed, referer: http://superhost.gr/
=

i tried to insert
print( filename )
sys.exit(0)

just before the execute
and the output is just Pacman.exe as seen in 

http://superhost.gr/?page=files.py

Seens the encoding precedure successfully turned all the filenames from 
greek-iso to utf-8 without failing, why woul it still be encoding issues 
when it comes to execute?

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Re: Encoding questions (continuation)

[Larry Hudson]

On 06/11/2013 01:09 PM, Νικόλαος Κούρας wrote:

Τη Τρίτη, 11 Ιουνίου 2013 10:52:02 π.μ. UTC+3, ο χρήστης Larry Hudson έγραψε:

On 06/10/2013 06:56 AM, Νικόλαος Κούρας wrote:



i think your suggestions works only if you have a mail handy in TB and you hit 
follow-up what if you dont have the mail handy?

Followup or Reply brings up the "Compose" window (with the message you're replying to already 
quoted).  Now you can either type your reply directly, OR if you have it already available you 
can copy/paste it.  THEN you click on "Send".  If it's a Followup it will be posted to the list, 
if it is a Reply it sends it as e-mail.


BTW, you can *AND SHOULD* edit the quoted text to remove all the unnecessary irrelevant crap, so 
you are quoting ONLY what you are actually replying to.  All the rest is junk and annoying.  But 
definitely keep the parts you are replying to give context to your reply message.


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Re: Turnign greek-iso filenames => utf-8 iso

[Steven D'Aprano]

On Wed, 12 Jun 2013 08:02:24 +, Νικόλαος Κούρας wrote:

> i tried to insert
> print( filename )
> sys.exit(0)

That's not very useful. That will just print ONE file name, then stop. 
You have how many files in there? Two? Twenty? What if the problem does 
not lie with the first one?

> just before the execute
> and the output is just Pacman.exe as seen in
> 
> http://superhost.gr/?page=files.py

Wrong. The output is:

Internal Server Error

The server encountered an internal error or misconfiguration and was 
unable to complete your request.  ...


> Seens the encoding precedure successfully turned all the filenames from
> greek-iso to utf-8 without failing, why woul it still be encoding issues
> when it comes to execute?

Because the problems are unrelated. Just because you fix one bug, doesn't 
mean all the other bugs magically disappear.



-- 
Steven
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Re: A certainl part of an if() structure never gets executed.

[Denis McMahon]

On Tue, 11 Jun 2013 13:20:52 -0700, Νικόλαος Κούρας wrote:

> The above if structure works correctly *only* if the user sumbits by
> form:
> 
> name, month, year or month, year
> 
> If, he just enter a year in the form and sumbit then, i get no error,
> but no results displayed back.
> 
> Any ideas as to why this might happen?

Yes, I know exactly why this is happening.

It is for one of two reasons. You may determine which one using the 
following secret code which I stole from the illuminati in 1836:

import random

reason = { 1: "Input data is not as expected by coder", 2: "Flow control 
logic not performing as coder expects", 3: "Badger Badger Badger Badger 
Badger Badger Badger Badger Mushroom", 4: "Please try again", 5: 
"Snake", 6: "Grumpy cat says fix your own damn code", 7: "I'll be 
back" }

print reason[ random.choice( reason.keys() ) ]

Note - this only has a small chance of actually doing what you want (ie 
giving a possibly accurate answer), but it sounds as if that's a level of 
precision you're used to working with anyway.

On a slightly more serious note, if you can't apply yourself to debugging 
a case of "the program logic isn't doing what I expect" for some value of 
program logic that you coded, that may be a hint that:

a) you don't actually understand what the program logic is doing

b) you shouldn't be writing logic so complex that you can't see how to 
debug it

c) your logic is overly convoluted and complex

d) all of the above

So perhaps you need to scrub the logic altogether, and start again taking 
smaller steps.

You could also perhaps do with a lesson in De Morgan's theorem:

not a and not b and not c = not ( a or b or c )

not a or not b or not c = not ( a and b and c )

and sometimes the alternative form is easier to understand

Now, looking at your code here are two important questions:

(1) What is the initial values of name, month and year?
(2) Which block is actually being executed?

Bear in mind that if a branch other than one you expect to be executed is 
executing, the fail condition might not be what you think it is. 
Specifically, is it possible that the code is executing the wrong branch 
and tripping up when it tries to generate or perhaps execute the sql 
statement empty strings, or just not getting any result from the sql 
because of the empty strings?

Hint - take the code from the current file, apply a liberal smattering of 
print statements, and test it for various values of month, year and name.

def test(name, month, year):
print "name, month, year ::", name, month, year
if not re.search( '=', name ) and not re.search( '=', month ) and 
not re.search( '=', year ):
print "branch 1"
elif not re.search( '=', month ) and not re.search( '=', year ):
print "branch 2"
elif not re.search( '=', year ):
print "branch 3"
else:
print "branch 4"

# testing logic for 8 possible input conditions

test("=", "=", "=")
test("=", "=", "x")
test("=", "x", "=")
test("=", "x", "x")
test("x", "=", "=")
test("x", "=", "x")
test("x", "x", "=")
test("x", "x", "x")

-- 
Denis McMahon, denismfmcma...@gmail.com
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Re: Encoding questions (continuation)

[Larry Hudson]

On 06/12/2013 01:20 AM, Larry Hudson wrote:

On 06/11/2013 01:09 PM, Νικόλαος Κούρας wrote:

Τη Τρίτη, 11 Ιουνίου 2013 10:52:02 π.μ. UTC+3, ο χρήστης Larry Hudson έγραψε:

On 06/10/2013 06:56 AM, Νικόλαος Κούρας wrote:


I forgot to specify I'm talking about using Thunderbird Newsgroups, not the E-mail part.  If 
you're not using the Thunderbird Newsgroups, try it.  It makes things much MUCH easier.  (And it 
eliminates the annoying double-spacing from Google Groups!)


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Re: Problems with serial port interface

[lionelgreenstreet]

I've done some tests: i've simulated a serial transmission with
1. Terminal.exe
https://sites.google.com/site/terminalbpp/
2. Com0com
I've made a script that transmit a char every 5ms. The test system is
Terminal---Com0Com---Terminal
so i haven't used my program.
After 3-4minutes the terminal program crashes, so i think that i have an OS 
problem: what do you think?I'm using Windows7/64bit...
Any suggestion?
Thanks


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Re: A certainl part of an if() structure never gets executed.

[Νικόλαος Κούρας]

On 12/6/2013 11:27 πμ, Denis McMahon wrote:

On Tue, 11 Jun 2013 13:20:52 -0700, Νικόλαος Κούρας wrote:


The above if structure works correctly *only* if the user sumbits by
form:

name, month, year or month, year

If, he just enter a year in the form and sumbit then, i get no error,
but no results displayed back.

Any ideas as to why this might happen?


Yes, I know exactly why this is happening.

It is for one of two reasons. You may determine which one using the
following secret code which I stole from the illuminati in 1836:

import random

reason = { 1: "Input data is not as expected by coder", 2: "Flow control
logic not performing as coder expects", 3: "Badger Badger Badger Badger
Badger Badger Badger Badger Mushroom", 4: "Please try again", 5:
"Snake", 6: "Grumpy cat says fix your own damn code", 7: "I'll be
back" }

print reason[ random.choice( reason.keys() ) ]

Note - this only has a small chance of actually doing what you want (ie
giving a possibly accurate answer), but it sounds as if that's a level of
precision you're used to working with anyway.

On a slightly more serious note, if you can't apply yourself to debugging
a case of "the program logic isn't doing what I expect" for some value of
program logic that you coded, that may be a hint that:

a) you don't actually understand what the program logic is doing

b) you shouldn't be writing logic so complex that you can't see how to
debug it

c) your logic is overly convoluted and complex

d) all of the above

So perhaps you need to scrub the logic altogether, and start again taking
smaller steps.

You could also perhaps do with a lesson in De Morgan's theorem:

not a and not b and not c = not ( a or b or c )

not a or not b or not c = not ( a and b and c )

and sometimes the alternative form is easier to understand

Now, looking at your code here are two important questions:

(1) What is the initial values of name, month and year?
(2) Which block is actually being executed?

Bear in mind that if a branch other than one you expect to be executed is
executing, the fail condition might not be what you think it is.
Specifically, is it possible that the code is executing the wrong branch
and tripping up when it tries to generate or perhaps execute the sql
statement empty strings, or just not getting any result from the sql
because of the empty strings?

Hint - take the code from the current file, apply a liberal smattering of
print statements, and test it for various values of month, year and name.

def test(name, month, year):
 print "name, month, year ::", name, month, year
if not re.search( '=', name ) and not re.search( '=', month ) and
not re.search( '=', year ):
print "branch 1"
elif not re.search( '=', month ) and not re.search( '=', year ):
print "branch 2"
elif not re.search( '=', year ):
print "branch 3"
else:
print "branch 4"

# testing logic for 8 possible input conditions

test("=", "=", "=")
test("=", "=", "x")
test("=", "x", "=")
test("=", "x", "x")
test("x", "=", "=")
test("x", "=", "x")
test("x", "x", "=")
test("x", "x", "x")



Thank you but i already foudn out what the problem was, i just don't 
known how to fix it. Here is is again:



Here is the defines of those variables. as you can see are all tuples

# populate names, months, years
names.add( '==' )
months = ( '==', 'Ιανουάριος', 'Φεβρουάριος', 'Μάρτιος',
'Απρίλιος', 'Μάϊος', 'Ιούνιος',
   'Ιούλιος', 'Αύγουστος', 'Σεπτέμβριος', 'Οκτώβριος',
'Νοέμβριος',
'Δεκέμβριος' )
years = ( '==', 2010, 2011, 2012, 2013 )




i used print( name, month, year ) and noticed that all values 
returned as expected when selected fro drop-down menus and submitted.


But when it comes to select '==' from month instead of
'==' to be submitted a zero gets submitted and i think the 
problem is the way i'm filling up months into the drop down menu which is:



for i, month in enumerate(months):
print(' %s ' % (i, month) )


the if case does not execute because of the way it checks for None entry
which is: elif '=' not in year:

but if enumerate yields 0 instead of '==' then elif '=' not in
year of course fails.

So, i must tell:

for i, month in enumerate(months):
print(' %s ' % (i, month) )

to somehow return '==' instead of 0 but don't know how.
--
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Re: Modify code with AST

[Peter Otten]

Ronny Mandal wrote:

> Hello,
> 
> I am trying to write a script which will parse a code segment (with
> ast.parse()), locate the correct function/method node (by name) in the
> resulting tree and replace this function (node) with another function
> (node), e.g.:
> 
> MyMod1.py:
> 
> class FooBar():
>   def Foo(self): #I want to replace this and only this
> return 1
> 
>   def Bar(self):
> return 2
> 
> Here is the parser-class:
> 
> class FindAndTransform(NodeTransformer):
>   """Visit the function and check name"""
>   def visit_FunctionDef(self, node):
> if node.name == 'Foo': #Only replace if name is "Foo"
>   #Create a new function and assign it to node
>   node = parse('''
> def add(n, m):
>   return n + m
> ''')
>   return node
> 
> When I run the parser on MyMod1.py and generate code (with codegen), the
> output is:
> 
> class FooBar():
>   def add(n, m):
> return n + m
> 
> i.e. both methods are replaced. It seems like "node" in the parser
> contains all method bodies of class FooBar, not only Foo. When ran through
> a debugger, it iterates both methods. What I really wanted to do, was to
> replace only one method (Foo) and leave the other untouched.
> 
> I hope this was understandable conveyed.

I think the main problem is that you have to return the unchanged node (you 
return None which might be an indentation accident). I also had to take the 
add() FunctionDef out of the enclosing Module. So (I don't have codegen or 
is it part of the stdlib?):

import ast

class FindAndTransform(ast.NodeTransformer):
def visit_FunctionDef(self, node):
if node.name == 'Foo':
node = ast.parse('''
def add(n, m):
  return n + m
''').body[0]
return node

if __name__ == "__main__":
orig = """
class FooBar():
  def Foo(self): #I want to replace this and only this
return 1

  def Bar(self):
return 2
"""

p = ast.parse(orig)
q = FindAndTransform().visit(p)
qq = compile(q, "", "exec")
exec(qq)
assert {n for n in dir(FooBar) if not n.startswith("_")} == {"Bar", 
"add"}


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Re: Turnign greek-iso filenames => utf-8 iso

[Νικόλαος Κούρας]

On 12/6/2013 11:31 πμ, Steven D'Aprano wrote:

On Wed, 12 Jun 2013 08:02:24 +, Νικόλαος Κούρας wrote:


i tried to insert
print( filename )
sys.exit(0)


That's not very useful. That will just print ONE file name, then stop.
You have how many files in there? Two? Twenty? What if the problem does
not lie with the first one?


just before the execute
and the output is just Pacman.exe as seen in

http://superhost.gr/?page=files.py


Wrong. The output is:

Internal Server Error


print( filenames )
sys.exit(0)


No it dosnt not, it loads properly and if you visit it again you will 
see all the files being displayed since now i:


print( filenames )
sys.exit(0)

Thne grek ones ar displayed as 
'\udcce\udc95\udccf\udc85\udccf\udc87\udcce\udcae 
\udccf\udc84\udcce\udcbf\udccf\udc85 
\udcce\udc99\udcce\udcb7\udccf\udc83\udcce\udcbf\udccf\udc8d.mp3' in Chrome


dont know why since the above procedure supposed to turned them into utf-8

ls -l apps though via putty display all filesnames correctly.

===
# Collect filenames of the path dir as strings
filenames = os.listdir( '/home/nikos/public_html/data/apps/' )

# Build a set of 'path/to/filename' based on the objects of path dir
filepaths = set()
for filename in filenames:
filepaths.add( filename )

# Load'em
for filename in filenames:
try:
		# Check the presence of a file against the database and insert if it 
doesn't exist

print( filenames )
sys.exit(0)
cur.execute('''SELECT url FROM files WHERE url = %s''', 
filename )
data = cur.fetchone()
===

Into the database only 2 english have been inserted pacman.exe and one 
other english filenames before filename breaks into the execute statemnt.


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Re: Turnign greek-iso filenames => utf-8 iso

[Νικόλαος Κούρας]

root@nikos [/home/nikos/www/data/apps]# ls -l
total 412788
drwxr-xr-x 2 nikos nikos 4096 Jun 12 12:03 ./
drwxr-xr-x 6 nikos nikos 4096 May 26 21:13 ../
-rwxr-xr-x 1 nikos nikos 13157283 Mar 17 12:57 100\ Mythoi\ tou\ 
Aiswpou.pdf*

-rwxr-xr-x 1 nikos nikos 29524686 Mar 11 18:17 Anekdotologio.exe*
-rw-r--r-- 1 nikos nikos 42413964 Jun  2 20:29 Battleship.exe
-rw-r--r-- 1 nikos nikos 51819750 Jun  2 20:04 Luxor\ Evolved.exe
-rw-r--r-- 1 nikos nikos 60571648 Jun  2 14:59 Monopoly.exe
-rwxr-xr-x 1 nikos nikos  1788164 Mar 14 11:31 Online\ Movie\ Player.zip*
-rw-r--r-- 1 nikos nikos  5277287 Jun  1 18:35 O\ Nomos\ tou\ Merfy\ 
v1-2-3.zip

-rwxr-xr-x 1 nikos nikos 16383001 Jun 22  2010 Orthodoxo\ Imerologio.exe*
-rw-r--r-- 1 nikos nikos  6084806 Jun  1 18:22 Pac-Man.exe
-rw-r--r-- 1 nikos nikos 45297713 Jun 10 12:38 Raptor\ Chess.exe
-rw-r--r-- 1 nikos nikos 25476584 Jun  2 19:50 Scrabble.exe
-rwxr-xr-x 1 nikos nikos 49141166 Mar 17 12:48 To\ 1o\ mou\ vivlio\ gia\ 
to\ skaki.pdf*

-rwxr-xr-x 1 nikos nikos  3298310 Mar 17 12:45 Vivlos\ gia\ Atheofovous.pdf*
-rw-r--r-- 1 nikos nikos  1764864 May 29 21:50 V-Radio\ v2.4.msi
-rw-r--r-- 1 nikos nikos  3511233 Jun  4 14:11 Ευχή\ του\ Ιησού.mp3
-rwxr-xr-x 1 nikos nikos 66896732 Mar 17 13:13 Κοσμάς\ Αιτωλός\ -\ 
Προφητείες.pdf*

-rw-r--r-- 1 nikos nikos   236032 Jun  4 14:10 Σκέψου\ έναν\ αριθμό.exe
root@nikos [/home/nikos/www/data/apps]#

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Re: A certainl part of an if() structure never gets executed.

[Fábio Santos]

On Wed, Jun 12, 2013 at 9:54 AM, Νικόλαος Κούρας  wrote:
> but if enumerate yields 0 instead of '==' then elif '=' not in
> year of course fails.
>
> So, i must tell:
>
> for i, month in enumerate(months):
> print(' %s ' % (i, month) )
>
> to somehow return '==' instead of 0 but don't know how.
> --
> http://mail.python.org/mailman/listinfo/python-list

Well, you could try this:

> for i, month in enumerate(months):
> if i == 0:
> month = ('=' * 10)
> print(' %s ' % (i, month) )

No?

--
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Re: A few questiosn about encoding

[Νικόλαος Κούρας]

>> (*) infact UTF8 also indicates the end of each character

> Up to a point.  The initial byte encodes the length and the top few
> bits, but the subsequent octets aren’t distinguishable as final in
> isolation.  0x80-0xBF can all be either medial or final.


So, the first high-bits are a directive that UTF-8 uses to know how many 
bytes each character is being represented as.

0-127 codepoints(characters) use 1 bit to signify they need 1 bit for 
storage and the rest 7 bits to actually store the character ?

while

128-256 codepoints(characters) use 2 bit to signify they need 2 bits for 
storage and the rest 14 bits to actually store the character ?

Isn't 14 bits way to many to store a character ? 
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Re: Turnign greek-iso filenames => utf-8 iso

[Steven D'Aprano]

On Wed, 12 Jun 2013 08:02:24 +, Νικόλαος Κούρας wrote:

> # Collect directory and its filenames as bytes
> path = b'/home/nikos/public_html/data/apps/'
> files = os.listdir( path )
[snip code]


I realised that the version I gave you earlier, or rather the modified 
version you came up with, was subject to a race condition. If somebody 
uploaded a file while the script was running, and that file name was not 
UTF-8 clean, the script would fail.

This version may be more robust and should be resistant to race 
conditions when files are uploaded. (However, do not *delete* files while 
this script is running.) As before, I have not tested this. I recommend 
that you test it thoroughly before deploying it live.



def guess_encoding(bytestring):
for encoding in ('utf-8', 'iso-8859-7', 'latin-1'):
try:
bytestring.decode(encoding)
except UnicodeDecodeError:
# Decoding failed. Try the next one.
pass
else:
# Decoding succeeded. This is our guess.
return encoding
# If we get here, none of the encodings worked. We cannot guess.
return None


path = b'/home/nikos/public_html/data/apps/'
files = os.listdir( path )
clean_files = []
for filename in files:
# Compute 'path/to/filename'
filepath_bytes = path + filename
encoding = guess_encoding(filepath_bytes)
if encoding == 'utf-8':
# File name is valid UTF-8, so we can skip to the next file.
clean_files.append(filepath_bytes)
continue
if encoding is None:
# No idea what the encoding is. Hit it with a hammer until it 
# stops moving.
filename = filepath_bytes.decode('utf-8', 'xmlcharrefreplace')
else:
filename = filepath_bytes.decode(encoding)
# Rename the file to something which ought to be UTF-8 clean.
newname_bytes = filename.encode('utf-8')
os.rename(filepath_bytes, newname_bytes)
clean_files.append(newname_bytes)
# Once we get here, the file ought to be UTF-8 clean,
# and the Unicode name ought to exist:
assert os.path.exists(newname_bytes.decode('utf-8'))

# Dump the old list of file names, it is no longer valid.
del files

# DO NOT CALL listdir again. Somebody might have uploaded a 
# new file, with a broken file name. That will be fixed next 
# time this script runs, but for now, we ignore the dirty file
# name and just use the list of clean file names we built above.

clean_files = set(clean_files)

for name_as_bytes in sorted(clean_files):
filename = name_as_bytes.decode('utf-8')
# Check the presence of a file against the database 
# and insert if it doesn't exist
cur.execute('SELECT url FROM files WHERE url = %s', filename)
data = cur.fetchone()




-- 
Steven
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Re: Turnign greek-iso filenames => utf-8 iso

[Steven D'Aprano]

On Wed, 12 Jun 2013 12:00:38 +0300, Νικόλαος Κούρας wrote:

> On 12/6/2013 11:31 πμ, Steven D'Aprano wrote:
>> On Wed, 12 Jun 2013 08:02:24 +, Νικόλαος Κούρας wrote:

>>> and the output is just Pacman.exe as seen in
>>>
>>> http://superhost.gr/?page=files.py
>>
>> Wrong. The output is:
>>
>> Internal Server Error
> 
> print( filenames )
> sys.exit(0)
> 
> 
> No it dosnt not, it loads properly and if you visit it again you will
> see all the files being displayed since now i:

Wrong again. It still gives Internal Error. I have just revisited the 
page three times now, and every time it still fails.

I am not lying, I am not making this up. Here is the text:



Internal Server Error

The server encountered an internal error or misconfiguration and was 
unable to complete your request.

Please contact the server administrator, supp...@superhost.gr and inform 
them of the time the error occurred, and anything you might have done 
that may have caused the error.

More information about this error may be available in the server error 
log.

Additionally, a 404 Not Found error was encountered while trying to use 
an ErrorDocument to handle the request.
Apache/2.2.24 (Unix) mod_ssl/2.2.24 OpenSSL/1.0.0-fips 
mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 Server at 
superhost.gr Port 80





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Re: A certainl part of an if() structure never gets executed.

[Νικόλαος Κούρας]

On 12/6/2013 12:07 μμ, F�bio Santos wrote:

On Wed, Jun 12, 2013 at 9:54 AM, Νικόλαος Κούρας  wrote:

but if enumerate yields 0 instead of '==' then elif '=' not in
year of course fails.

So, i must tell:

for i, month in enumerate(months):
 print(' %s ' % (i, month) )

to somehow return '==' instead of 0 but don't know how.
--
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Well, you could try this:


for i, month in enumerate(months):
 if i == 0:
 month = ('=' * 10)
 print(' %s ' % (i, month) )


No?


I'am afraid not Fabio, i just tried byt sumbitting only the year, not 
name not month


after printign the valeus to see what went wrong, the values look like:

== 0 2010

instead of:

== ==  2010

== is the value of the month when its not selected by the user, 
but even with your suggestions it reurns t0 intead of the equal signs.


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Re: Turnign greek-iso filenames => utf-8 iso

[Νικόλαος Κούρας]

On 12/6/2013 12:17 μμ, Steven D'Aprano wrote:

On Wed, 12 Jun 2013 12:00:38 +0300, Νικόλαος Κούρας wrote:


On 12/6/2013 11:31 πμ, Steven D'Aprano wrote:

On Wed, 12 Jun 2013 08:02:24 +, Νικόλαος Κούρας wrote:



and the output is just Pacman.exe as seen in

http://superhost.gr/?page=files.py


Wrong. The output is:

Internal Server Error


print( filenames )
sys.exit(0)


No it dosnt not, it loads properly and if you visit it again you will
see all the files being displayed since now i:


Wrong again. It still gives Internal Error. I have just revisited the
page three times now, and every time it still fails.

I am not lying, I am not making this up. Here is the text:



Internal Server Error

The server encountered an internal error or misconfiguration and was
unable to complete your request.

Please contact the server administrator, supp...@superhost.gr and inform
them of the time the error occurred, and anything you might have done
that may have caused the error.

More information about this error may be available in the server error
log.

Additionally, a 404 Not Found error was encountered while trying to use
an ErrorDocument to handle the request.
Apache/2.2.24 (Unix) mod_ssl/2.2.24 OpenSSL/1.0.0-fips
mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 Server at
superhost.gr Port 80


I know that you do not lie and also i think i know why *you* 
specifically can load my webiste.



i think your ip address does not have a PTR entry (reverse DNS entry)

and when you try to laod superhost.gr this lines fail for you and hece 
it errs out an internal server error.


host = socket.gethostbyaddr( os.environ['REMOTE_ADDR'] )[0]


i just switched the above line to to avoid missing PTRs

host = socket.gethostbyaddr( os.environ['REMOTE_ADDR'] )[0] or 'UnResolved'

Try now please.
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Re: A few questiosn about encoding

[Steven D'Aprano]

On Wed, 12 Jun 2013 09:09:05 +, Νικόλαος Κούρας wrote:

> Isn't 14 bits way to many to store a character ?

No.

There are 1114111 possible characters in Unicode. (And in Japan, they 
sometimes use TRON instead of Unicode, which has even more.)

If you list out all the combinations of 14 bits:

   00
   01
   10
   11
[...]
   10
   11

you will see that there are only 32767 (2**15-1) such values. You can't 
fit 1114111 characters with just 32767 values.



-- 
Steven
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Re: Turnign greek-iso filenames => utf-8 iso

[Steven D'Aprano]

On Wed, 12 Jun 2013 12:24:24 +0300, Νικόλαος Κούρας wrote:

> On 12/6/2013 12:17 μμ, Steven D'Aprano wrote:
>> On Wed, 12 Jun 2013 12:00:38 +0300, Νικόλαος Κούρας wrote:
>>
>>> On 12/6/2013 11:31 πμ, Steven D'Aprano wrote:
 On Wed, 12 Jun 2013 08:02:24 +, Νικόλαος Κούρας wrote:
>>
> and the output is just Pacman.exe as seen in
>
> http://superhost.gr/?page=files.py

Νικόλαος, look at the URL you have given me. It still fails. I have 
tested it repeatedly.[1]


Now look at this URL:

http://superhost.gr/data/apps/

Notice that it is a different URL? That one works and shows the file 
listing.

Also, you need to include an encoding line in the page, otherwise people 
viewing it will see mojibake. You need a line like:



in the generated HTML.



[1] Correction. While I was typing this, it came good, for about 20 
seconds, and displayed a hideously ugly background pattern and a cute 
smiling face waving, and then broke again.



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Re: A certainl part of an if() structure never gets executed.

[Fábio Santos]

On 12 Jun 2013 10:29, "Νικόλαος Κούρας"  wrote:
>
> On 12/6/2013 12:07 μμ, F�bio Santos wrote:
>>
>> On Wed, Jun 12, 2013 at 9:54 AM, Νικόλαος Κούρας 
wrote:
>>>
>>> but if enumerate yields 0 instead of '==' then elif '=' not in
>>> year of course fails.
>>>
>>> So, i must tell:
>>>
>>> for i, month in enumerate(months):
>>>  print(' %s ' % (i, month) )
>>>
>>> to somehow return '==' instead of 0 but don't know how.
>>> --
>>> http://mail.python.org/mailman/listinfo/python-list
>>
>>
>> Well, you could try this:
>>
>>> for i, month in enumerate(months):
>>>  if i == 0:
>>>  month = ('=' * 10)
>>>  print(' %s ' % (i, month) )
>>
>>
>> No?
>
>
> I'am afraid not Fabio, i just tried byt sumbitting only the year, not
name not month
>
> after printign the valeus to see what went wrong, the values look like:
>
> == 0 2010
>
> instead of:
>
> == ==  2010
>
> == is the value of the month when its not selected by the user,
but even with your suggestions it reurns t0 intead of the equal signs.
>
> --
> http://mail.python.org/mailman/listinfo/python-list

Have you tried

i = month = '=' * 10

I had assumed you just wanted those equal signs for the user display.
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Re: A certainl part of an if() structure never gets executed.

[Andreas Perstinger]

[Please trim your replies to the relevant parts.]

On 12.06.2013 10:54, Νικόλαος Κούρας wrote:

But when it comes to select '==' from month instead of
'==' to be submitted a zero gets submitted and i think the
problem is the way i'm filling up months into the drop down menu which is:


for i, month in enumerate(months):
  print(' %s ' % (i, month) )


the if case does not execute because of the way it checks for None entry
which is: elif '=' not in year:

but if enumerate yields 0 instead of '==' then elif '=' not in
year of course fails.


How often do we need to tell you that you should reread your posts 
before sending them?
You start with telling us you have problems with "month" and then show 
us code regarding "year"



So, i must tell:

for i, month in enumerate(months):
  print(' %s ' % (i, month) )

to somehow return '==' instead of 0 but don't know how.


As with most of your problems you are barking up the wrong tree.
Why not use the actual value you get from the form to check whether you 
have a valid month?

Do you understand why "0" is submitted instead of "=="?

Bye, Andreas
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Re: Questions on "import" and "datetime"

[Yunfei Dai]

On Monday, June 10, 2013 7:01:30 PM UTC+2, Zachary Ware wrote:
> On Mon, Jun 10, 2013 at 10:37 AM, Yunfei Dai  
> wrote:
> 
> > Hi all,
> 
> 
> 
> Hi Yunfei,
> 
> 
> 
> >
> 
> > I have some questions on "import":
> 
> >
> 
> > 1."from datetime import datetime" works well. But I am confused why "import 
> > datetime.datetime" leads to importerror. "from xlrd import open_workbook" 
> > could be replaced by "from xlrd.open_workbook" without any problem.
> 
> 
> 
> I assume you mean "import xlrd.open_workbook" here, as "from
> 
> xlrd.open_workbook" would be a SyntaxError :)
> 
> 
> 
> > The only difference here is that if "from xlrd import open_workbook" is 
> > used we do not have to write "xlrd.open_workbook" in the following code but 
> > just "open_workbook". So my understanding of the difference is 
> > "from...import..." shortens the code (just like "using namespace std" in 
> > C++) but maybe leads to name clash.
> 
> 
> 
> "from ... import ..." imports an object from a module and assigns it
> 
> to a local name that is the same as the name in the other module.  In
> 
> other words, the following two examples do the same thing:
> 
> 
> 
> from foo import bar
> 
> 
> 
> import foo;bar = foo.bar
> 
> 
> 
> If foo.bar happens to be a module (module 'bar' in package 'foo'), you
> 
> could also do this:
> 
> 
> 
> import foo.bar as bar
> 
> 
> 
> ...and that restriction is where your problem lies.
> 
> 
> 
> > But what is the problem of datetime?
> 
> 
> 
> I'm not familiar with xlrd, but I believe the difference between
> 
> xlrd.open_workbook and datetime.datetime would be that
> 
> xlrd.open_workbook is a module in a package, while datetime.datetime
> 
> is a class in a module.  'from ... import ...' can import any object
> 
> from the target module/package, and assign it to a local name.
> 
> 'import ...' on the other hand can only import a module (you'll notice
> 
> the ImportError you get when you try 'import datetime.datetime' is 'No
> 
> module named datetime'.  This particular example is a bit confusing
> 
> due to there being a class in a module of the same name, but try
> 
> 'import datetime.date' for a clearer message.
> 
> 
> 
> > 2.I am also comfused that "datetime.datetime" is a function but whithin 
> > "datetime.datetime" there are lots of other functions. So what is the type 
> > of "datetime.datetime" on earth? is it a function, or a class or a 
> > folder(library) here?
> 
> 
> 
> datetime.datetime is actually a type of type 'type' (as can be seen
> 
> with 'import datetime;type(datetime.datetime)').  In Python 2, this
> 
> means it is a new-style class (meaning it is a subclass of 'object').
> 
> In Python 3, it's just a class (since there are no longer old-style
> 
> classes).
> 
> 
> 
> > Thanks very much in advance! Very looking forward to your answers.
> 
> >
> 
> > Best,
> 
> > Yunfei
> 
> >
> 
> 
> 
> I hope I have actually answered your question and not just muddied
> 
> things further for you.  You can of course ask again if I've made
> 
> things worse :)
> 
> 
> 
> -- Zach

Hi Zach,

Thanks so much for your quick, long and detailed reply and sorry for replying 
you late. It is really helpful for me understanding "import". 

Yunfei


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Re: Modify code with AST

[Ronny Mandal]

> I think the main problem is that you have to return the unchanged node (you 
> 
> return None which might be an indentation accident). I also had to take the 
> 
> add() FunctionDef out of the enclosing Module. So (I don't have codegen or 
> 
> is it part of the stdlib?):

Thank you, my problem is now solved. It was the indentation of the return 
statement which was the culprit. I forgot that visit() (in this context) is 
called once for each FunctionDef-node. I moved the return-statement one click 
to the left, then it worked.

codegen is not a part of the stdlib. It is written by Armin Ronacher (the same 
person who wrote ast) and it uses ast to generate python code from the AST.

Thanks!


Regards,

Ronny Mandal

> 
> 
> 
> import ast
> 
> 
> 
> class FindAndTransform(ast.NodeTransformer):
> 
> def visit_FunctionDef(self, node):
> 
> if node.name == 'Foo':
> 
> node = ast.parse('''
> 
> def add(n, m):
> 
>   return n + m
> 
> ''').body[0]
> 
> return node
> 
> 
> 
> if __name__ == "__main__":
> 
> orig = """
> 
> class FooBar():
> 
>   def Foo(self): #I want to replace this and only this
> 
> return 1
> 
> 
> 
>   def Bar(self):
> 
> return 2
> 
> """
> 
> 
> 
> p = ast.parse(orig)
> 
> q = FindAndTransform().visit(p)
> 
> qq = compile(q, "", "exec")
> 
> exec(qq)
> 
> assert {n for n in dir(FooBar) if not n.startswith("_")} == {"Bar", 
> 
> "add"}
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Re: Turnign greek-iso filenames => utf-8 iso

[Νικόλαος Κούρας]

Thanks Steven , i made some alternations to the variables names and at 
the end of the way that i check a database filename against and hdd 
filename. Here is the code:


# 
=

# Convert wrongly encoded filenames to utf-8
# 
=

path = b'/home/nikos/public_html/data/apps/'
filenames = os.listdir( path )

utf8_filenames = []

for filename in filenames:
# Compute 'path/to/filename'
filename_bytes = path + filename
encoding = guess_encoding( filename_bytes )

if encoding == 'utf-8':
# File name is valid UTF-8, so we can skip to the next file.
utf8_filenames.append( filename_bytes )
continue
elif encoding is None:
		# No idea what the encoding is. Hit it with a hammer until it stops 
moving.

filename = filename_bytes.decode( 'utf-8', 'xmlcharrefreplace' )
else:
filename = filename_bytes.decode( encoding )

# Rename the file to something which ought to be UTF-8 clean.
newname_bytes = filename.encode('utf-8')
os.rename( filename_bytes, newname_bytes )
utf8_filenames.append( newname_bytes )

	# Once we get here, the file ought to be UTF-8 clean and the Unicode 
name ought to exist:

assert os.path.exists( newname_bytes.decode('utf-8') )


# Switch filenames from utf8 bytestrings => unicode strings
filenames = []

for utf8_filename in utf8_filenames:
filenames.append( utf8_filename.decode('utf-8') )

# Check the presence of a database file against the dir files and delete 
record if it doesn't exist

cur.execute('''SELECT url FROM files''')
data = cur.fetchall()

for url in data:
if url not in filenames:
# Delete spurious
cur.execute('''DELETE FROM files WHERE url = %s''', url )
=

Now 'http://superhost.gr/?page=files.py' is not erring out at all but 
also it doesn't display the big filename table for users to download.


Here is how i try to print the filenames with button for the users:

=
#Display ALL files, each with its own download button# 
=

print('''
 
 
''')

try:
cur.execute( '''SELECT * FROM files ORDER BY lastvisit DESC''' )
data = cur.fetchall()

for row in data:
(filename, hits, host, lastvisit) = row
lastvisit = lastvisit.strftime('%A %e %b, %H:%M')

print('''


   
   %s 

   %s 

   %s 



''' % (filename, hits, host, lastvisit) )
print( '' )
except pymysql.ProgrammingError as e:
print( repr(e) )
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Re: Questions on "import" and "datetime"

[Yunfei Dai]

On Monday, June 10, 2013 9:10:16 PM UTC+2, Dave Angel wrote:
> On 06/10/2013 01:01 PM, Zachary Ware wrote:
> 
> > On Mon, Jun 10, 2013 at 10:37 AM, Yunfei Dai  
> > wrote:
> 
> >> Hi all,
> 
> >
> 
> > Hi Yunfei,
> 
> >
> 
> >>
> 
> >> I have some questions on "import":
> 
> >>
> 
> >> 1."from datetime import datetime" works well. But I am confused why 
> >> "import datetime.datetime" leads to importerror. "from xlrd import 
> >> open_workbook" could be replaced by "from xlrd.open_workbook" without any 
> >> problem.
> 
> >
> 
> 
> 
> It's a historical flaw in datetime that the class has the same name as 
> 
> the module it's in.  It should have been called class Datetime 
> 
> (according to pep 10, class names should be capitalized).  If that were 
> 
> the case, it'd be clear that datetime.Datetime is a class.
> 
> 
> 
> It would also be clearer that
> 
>  from datetime import Datetime
> 
> 
> 
> creates an alias in the present global namespace for the 
> 
> datetime.Datetime class, as simply Datetime.
> 
> 
> 
> This class has attributes that you can access, like Datetime.hour, and 
> 
> it has static methods like Datetime.fromTimeStamp().
> 
>   And like all classes, it's "callable", meaning that you can create an 
> 
> instance by pretending it's a function:
> 
> obj = Datetime(2013, 12, 1)
> 
> 
> 
> But since it's not a module inside a package, you can't use the form:
> 
> 
> 
> import datetime.Datetime
> 
> 
> 
> Now, just interpret all the above with a lowercase "D" and the confusion 
> 
> becomes clearer.  The compiler/interpreter doesn't care either way.
> 
> 
> 
> 
> 
> > "from ... import ..." imports an object from a module and assigns it
> 
> > to a local name that is the same as the name in the other module.  In
> 
> > other words, the following two examples do the same thing:
> 
> >
> 
> > from foo import bar
> 
> >
> 
> > import foo;bar = foo.bar
> 
> >
> 
> > If foo.bar happens to be a module (module 'bar' in package 'foo'), you
> 
> > could also do this:
> 
> >
> 
> > import foo.bar as bar
> 
> >
> 
> > ...and that restriction is where your problem lies.
> 
> >
> 
> 
> 
> In other words, since datetime.datetime is a class, not a module, you 
> 
> can't just import it.
> 
> 
> 
>  
> 
> >
> 
> >> 2.I am also comfused that "datetime.datetime" is a function but whithin 
> >> "datetime.datetime" there are lots of other functions. So what is the type 
> >> of "datetime.datetime" on earth? is it a function, or a class or a 
> >> folder(library) here?
> 
> >
> 
> 
> 
> As I said before, datetime.datetime is a class, and the functions within 
> 
> it are called methods.
> 
> 
> 
> You can see it all for yourself very easily.  Use the __file__ attribute 
> 
> to locate the source for datetime module on your system.  Here's what it 
> 
> looks like on mine:
> 
> 
> 
>  >>> import datetime
> 
>  >>> datetime.__file__
> 
> '/usr/local/lib/python3.3/datetime.py'
> 
> 
> 
> Then you can go look at that file.  For my copy, the datetime class 
> 
> begins at 1301.  But you can just search for the following line:
> 
> 
> 
> 
> 
> 
> 
> class datetime(date):
> 
> 
> 
> HTH
> 
> 
> 
> -- 
> 
> DaveA

Thank you Dave for your reply! It is very helpful.
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Re: A certainl part of an if() structure never gets executed.

[Cameron Simpson]

On 11Jun2013 18:25, Nikos  wrote:
| > What are the values of 'name', 'month' and 'year' in each of the cases?
| > 
| > Printing out ascii(name), ascii(month) and ascii(year), will be helpful.
| > 
| > Then try stepping through those lines in your head.
| 
| i hav epribted all values of those variables and they are all correct.
| i just dont see why ti fails to enter the specific if case.

Gah!
_Show_ us the values!
And _specify_ which part of the if-statement should run.
-- 
Cameron Simpson 

It's a vague science.   - Rory Tate, circle researcher.
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Re: A certainl part of an if() structure never gets executed.

[Νικόλαος Κούρας]

 Original Message 
Subject: Re: A certainl part of an if() structure never gets executed.
Date: Wed, 12 Jun 2013 10:07:39 +0100
From: Fábio Santos 
To: Νικόλαος Κούρας 
CC: python-list@python.org 
Newsgroups: comp.lang.python
References: <2bc90d3b-09c2-4315-9357-ff7f03946...@googlegroups.com> 
 


On Wed, Jun 12, 2013 at 9:54 AM, Νικόλαος Κούρας  
wrote:

> but if enumerate yields 0 instead of '==' then elif '=' not in
> year of course fails.
>
> So, i must tell:
>
> for i, month in enumerate(months):
> print(' %s ' % (i, month) )
>
> to somehow return '==' instead of 0 but don't know how.
> --
> http://mail.python.org/mailman/listinfo/python-list

Well, you could try this:

> for i, month in enumerate(months):
> if i == 0:
> month = ('=' * 10)
> print(' %s ' % (i, month) )

No?

You can see if for yourself if you go to:
http://superhost.gr/?page=pelatologio.py

bottom down where the form drop down menus are:

search will work but f the suer just gives out the year it will never 
make it to the specific if() branch.




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Re: A certainl part of an if() structure never gets executed.

[Νικόλαος Κούρας]

On 12/6/2013 1:07 μμ, Andreas Perstinger wrote:


So, i must tell:

for i, month in enumerate(months):
  print(' %s ' % (i, month) )

to somehow return '==' instead of 0 but don't know how.


As with most of your problems you are barking up the wrong tree.
Why not use the actual value you get from the form to check whether you
have a valid month?
Do you understand why "0" is submitted instead of "=="?


No, this is exactly what i do not understand.

months = ( '==', 'Ιανουάριος', 'Φεβρουάριος', 'Μάρτιος', 
'Απρίλιος', 'Μάϊος', 'Ιούνιος',
   'Ιούλιος', 'Αύγουστος', 'Σεπτέμβριος', 'Οκτώβριος', 
'Νοέμβριος', 'Δεκέμβριος' )


This is a tuple containign months. Then we have this:

for i, month in enumerate(months):
  print(' %s ' % (i, month) )

i is assiciated to month in similar fashion as a dic's key to it's value

i = the increasing counter after each iteration in the loop
month = just the displayed month.

when iteration happens we get this:

value 0 for month '=='
value 1 for month 'Ιανουάριος'
.
.
value 12 for month 'Δεκέμβριος'

So when '==' is being selected as month from the user value 0 is 
beign returned, but what i need is the string '==' itself, not 
the value.


the year var have no prblem, is the month that always fails the if() 
condition branch.

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Re: A certainl part of an if() structure never gets executed.

[Νικόλαος Κούρας]

Oh my God!

i just need to do this:

for i, month in enumerate( months ):
print(' %s ' % (month, month) )
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Re: PYTHONPATH: dev and prod

[jacopo]

this idea seemed perfect but it turned out that you have to execute the module 
as a package (python -m scripts.myscript) otherwise I get an error on the 
relative import. 
Unfortunately I am working in a team and I do not have control on how the 
module is launched.


On Tuesday, June 11, 2013 6:14:43 PM UTC+1, rusi wrote:
> On Jun 11, 9:28 pm, jacopo  wrote:
> 
> > I am developing my code in the path:
> 
> > /py/myscripts
> 
> > /py/mylib
> 
> > In order to "import mylib", I need to add /py/mylib to PYTHONPATH.
> 
> >
> 
> > Now I want to save a snapshot of the current code in the production 
> > directory, I will copy all in:
> 
> > /prod/myscripts
> 
> > /prod/mylib
> 
> >
> 
> > The problem now is that when I execute /prod/myscripts/any_script.py, every 
> > "import" will look at PYTHONPATH and therefore it will load the modules 
> > from /py/mylib. On the contrary I want to load it from /prod/mylib.
> 
> >
> 
> > Is there an elegant way to cope with this?
> 
> >
> 
> > thanks, Jacopo
> 
> 
> 
> 
> 
> Use explicit (dot-based) relative imports
> 
> http://docs.python.org/release/2.5/whatsnew/pep-328.html
> 
> Avoid using PYTHONPATH
> 
> 

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Re: A certainl part of an if() structure never gets executed.

[feedthetroll]

Am Mittwoch, 12. Juni 2013 12:07:54 UTC+2 schrieb Andreas Perstinger:
> [Please trim your replies to the relevant parts.]
> On 12.06.2013 10:54, Νικόλαος Κούρας wrote:
> > But when it comes to select '==' from month instead of
> > '==' to be submitted a zero gets submitted and i think the
> > problem is the way i'm filling up months into the drop down menu which is:
> 
> > for i, month in enumerate(months):
> >   print(' %s ' % (i, month) )
> >
> > the if case does not execute because of the way it checks for None entry
> > which is: elif '=' not in year:
> > but if enumerate yields 0 instead of '==' then elif '=' not in
> > year of course fails.
> 
> How often do we need to tell you that you should reread your posts 
> before sending them?
> You start with telling us you have problems with "month" and then show 
> us code regarding "year"
> 
> > So, i must tell:
> >
> > for i, month in enumerate(months):
> >   print(' %s ' % (i, month) )
> >
> > to somehow return '==' instead of 0 but don't know how.
> 
> As with most of your problems you are barking up the wrong tree.
> Why not use the actual value you get from the form to check whether you 
> have a valid month?
> 
> Do you understand why "0" is submitted instead of "=="?
> 
To Nikos:
My I elaborate that for you:
Your form contains:  == 
If you still don't know why you get "0" read:
  http://www.w3schools.com/tags/att_option_value.asp (or something in
  greek about html forms)
(Sorry, I know, you do not read doks, because they describe what the software
DOES and not what you WANT it to DO)

So this is no python problem, it is a html-problem.
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Re: PYTHONPATH: dev and prod

[jacopo]

this idea seemed perfect but it turned out that you have to execute the module 
as a package (python -m py.myscripts.any_script) otherwise I get an error on 
the relative import. 
Unfortunately I am working in a team and I do not have control on how the 
module is launched. 

On Tuesday, June 11, 2013 6:14:43 PM UTC+1, rusi wrote:
> On Jun 11, 9:28 pm, jacopo  wrote:
> 
> > I am developing my code in the path:
> 
> > /py/myscripts
> 
> > /py/mylib
> 
> > In order to "import mylib", I need to add /py/mylib to PYTHONPATH.
> 
> >
> 
> > Now I want to save a snapshot of the current code in the production 
> > directory, I will copy all in:
> 
> > /prod/myscripts
> 
> > /prod/mylib
> 
> >
> 
> > The problem now is that when I execute /prod/myscripts/any_script.py, every 
> > "import" will look at PYTHONPATH and therefore it will load the modules 
> > from /py/mylib. On the contrary I want to load it from /prod/mylib.
> 
> >
> 
> > Is there an elegant way to cope with this?
> 
> >
> 
> > thanks, Jacopo
> 
> 
> 
> 
> 
> Use explicit (dot-based) relative imports
> 
> http://docs.python.org/release/2.5/whatsnew/pep-328.html
> 
> Avoid using PYTHONPATH
> 
> 
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Re: A certainl part of an if() structure never gets executed.

[Νικόλαος Κούρας]

As with most of your problems you are barking up the wrong tree.
Why not use the actual value you get from the form to check whether you
have a valid month?
Do you understand why "0" is submitted instead of "=="?

Bye, Andreas


I have corrected the enumerate loop but it seems thet now the year works 
and the selected name nad month fail:


if '=' not in ( name and month and year ):
			cur.execute( '''SELECT * FROM works WHERE clientsID = (SELECT id FROM 
clients WHERE name = %s) and MONTH(lastvisit) = %s and YEAR(lastvisit) = 
%s ORDER BY lastvisit ASC''', (name, month, year) )

elif '=' not in ( month and year ):
			cur.execute( '''SELECT * FROM works WHERE MONTH(lastvisit) = %s and 
YEAR(lastvisit) = %s ORDER BY lastvisit ASC''', (month, year) )

elif '=' not in year:
			cur.execute( '''SELECT * FROM works WHERE YEAR(lastvisit) = %s ORDER 
BY lastvisit ASC''', year )

else:
			print( 'Πώς να γίνει αναζήτηση αφού δεν επέλεξες 
ούτε πελάτη ούτε μήνα ή τουλάχιστον το έτος?' )
			print( 'content="5;/cgi-bin/pelatologio.py">' )

sys.exit(0)


i tried in , not in and all possible combinations. but somehow it 
confuses me.


doesn't that mean?

if '=' not in ( name and month and year ):

if '=' does not exists as a char inside the name and month and year 
variables?


i think it does, but why it fails then?
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Re: A few questiosn about encoding

[Νικόλαος Κούρας]

On 12/6/2013 12:24 μμ, Steven D'Aprano wrote:

On Wed, 12 Jun 2013 09:09:05 +, Νικόλαος Κούρας wrote:


Isn't 14 bits way to many to store a character ?


No.

There are 1114111 possible characters in Unicode. (And in Japan, they
sometimes use TRON instead of Unicode, which has even more.)

If you list out all the combinations of 14 bits:

   00
   01
   10
   11
[...]
   10
   11

you will see that there are only 32767 (2**15-1) such values. You can't
fit 1114111 characters with just 32767 values.




Thanks Steven,
So, how many bytes does UTF-8 stored for codepoints > 127 ?

example for codepoint 256, 1345, 16474 ?
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Re: Turnign greek-iso filenames => utf-8 iso

[Νικόλαος Κούρας]

On 12/6/2013 12:37 μμ, Steven D'Aprano wrote:

On Wed, 12 Jun 2013 12:24:24 +0300, Νικόλαος Κούρας wrote:




[1] Correction. While I was typing this, it came good, for about 20
seconds, and displayed a hideously ugly background pattern and a cute
smiling face waving, and then broke again.



Ah sorry Steven i made the change of:

host = socket.gethostbyaddr( os.environ['REMOTE_ADDR'] )[0] or 'UnResolved'

to metrites.py isntead of files.py

now i have made both chnages.

you can see the webpage now, eys the one with the cure smile face.

behidn that we should beeen seeing all the files in a table like format 
for uses to downlaod, instead not a single file is being displayed.


here is the print process., actually here is what i have up until now 
after modifications for you to take an overall look.


# 
=

# Convert wrongly encoded filenames to utf-8
# 
=

path = b'/home/nikos/public_html/data/apps/'
filenames = os.listdir( path )

utf8_filenames = []

for filename in filenames:
# Compute 'path/to/filename'
filename_bytes = path + filename
encoding = guess_encoding( filename_bytes )

if encoding == 'utf-8':
# File name is valid UTF-8, so we can skip to the next file.
utf8_filenames.append( filename_bytes )
continue
elif encoding is None:
		# No idea what the encoding is. Hit it with a hammer until it stops 
moving.

filename = filename_bytes.decode( 'utf-8', 'xmlcharrefreplace' )
else:
filename = filename_bytes.decode( encoding )

# Rename the file to something which ought to be UTF-8 clean.
newname_bytes = filename.encode('utf-8')
os.rename( filename_bytes, newname_bytes )
utf8_filenames.append( newname_bytes )

	# Once we get here, the file ought to be UTF-8 clean and the Unicode 
name ought to exist:

assert os.path.exists( newname_bytes.decode('utf-8') )


# Switch filenames from utf8 bytestrings => unicode strings
filenames = []

for utf8_filename in utf8_filenames:
filenames.append( utf8_filename.decode('utf-8') )

# Check the presence of a database file against the dir files and delete 
record if it doesn't exist

cur.execute('''SELECT url FROM files''')
data = cur.fetchall()

for url in data:
if url not in filenames:
# Delete spurious
cur.execute('''DELETE FROM files WHERE url = %s''', url )


# 
=

# Display ALL files, each with its own download button
# 
=

print('''
 
 
''')

try:
cur.execute( '''SELECT * FROM files ORDER BY lastvisit DESC''' )
data = cur.fetchall()

for row in data:
(filename, hits, host, lastvisit) = row
lastvisit = lastvisit.strftime('%A %e %b, %H:%M')

print('''


   
   %s 

   %s 

   %s 



''' % (filename, hits, host, lastvisit) )
print( '' )
except pymysql.ProgrammingError as e:
print( repr(e) )

sys.exit(0)

==
ima happy that at elaST IT DOES NOT ERRIGN OUT!
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Re: Split a list into two parts based on a filter?

[Roy Smith]

In article ,
 Phil Connell  wrote:

> > Well, continuing down this somewhat bizarre path:
> >
> > new_songs, old_songs = [], []
> > itertools.takewhile(
> > lambda x: True,
> > (new_songs if s.is_new() else old_songs).append(s) for s in songs)
> > )
> >
> > I'm not sure I got the syntax exactly right, but the idea is anything
> > that will iterate over a generator expression.  That at least gets rid
> > of the memory requirement to hold the throw-away list :-)
> 
> You could equivalently pass the generator to deque() with maxlen=0 - this
> consumes the iterator with constant memory usage.
> 
> We are of course firmly in the twilight zone at this point (although this
> can be a useful technique in general).

We've been in the twilight zone for a while.  That's when the fun 
starts.  But, somewhat more seriously, I wonder what, exactly, it is 
that freaks people out about:

 [(new_songs if s.is_new() else old_songs).append(s) for s in songs]

Clearly, it's not the fact that it build and immediately discards a 
list, because that concern is addressed with the generator hack, and I 
think everybody (myself included) agrees that's just horrible.

Or, is it the use of the conditional to create the target for append()?  
Would people be as horrified if I wrote:

for s in songs:
(new_songs if s.is_new() else old_songs).append(s)

or even:

for s in songs:
the_right_list = new_songs if s.is_new() else old_songs
the_right_list.append(s)
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Re: A certainl part of an if() structure never gets executed.

[Fábio Santos]

On 12 Jun 2013 12:08, "Νικόλαος Κούρας"  wrote:
>
> Oh my God!
>
> i just need to do this:
>
>
> for i, month in enumerate( months ):
> print(' %s ' % (month, month) )

Usually what goes in  is an ID of something. You should
keep using (i, month) and then do months[id] to get the month string.

Also, tuples aren't traditionally used for this. Normally you'd use a list.
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Re: Split a list into two parts based on a filter?

[Fábio Santos]

On 12 Jun 2013 12:43, "Roy Smith"  wrote:
>
> In article ,
>  Phil Connell  wrote:
>
> > > Well, continuing down this somewhat bizarre path:
> > >
> > > new_songs, old_songs = [], []
> > > itertools.takewhile(
> > > lambda x: True,
> > > (new_songs if s.is_new() else old_songs).append(s) for s in songs)
> > > )
> > >
> > > I'm not sure I got the syntax exactly right, but the idea is anything
> > > that will iterate over a generator expression.  That at least gets rid
> > > of the memory requirement to hold the throw-away list :-)
> >
> > You could equivalently pass the generator to deque() with maxlen=0 -
this
> > consumes the iterator with constant memory usage.
> >
> > We are of course firmly in the twilight zone at this point (although
this
> > can be a useful technique in general).
>
> We've been in the twilight zone for a while.  That's when the fun
> starts.  But, somewhat more seriously, I wonder what, exactly, it is
> that freaks people out about:
>
>  [(new_songs if s.is_new() else old_songs).append(s) for s in songs]
>
> Clearly, it's not the fact that it build and immediately discards a
> list, because that concern is addressed with the generator hack, and I
> think everybody (myself included) agrees that's just horrible.

I think someone has already said that the problem is that you're creating
the list comprehension just for the side effects.

> Or, is it the use of the conditional to create the target for append()?

I particularly liked that part.
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Re: PYTHONPATH: dev and prod

[rusi]

On Jun 12, 4:10 pm, jacopo  wrote:
> this idea seemed perfect but it turned out that you have to execute the 
> module as a package
> (python -m py.myscripts.any_script) otherwise I get an error on the relative 
> import.
> Unfortunately I am working in a team and I do not have control on how the 
> module is launched.

You need to give more data:

1. How you run -- 'launch' -- the code -- from py and from prod
2. What error you get
3. Did you try bundling your modules into a package? What problem
happened?

If PYTHONPATH does not work for you you can look at path-configuration-
files (.pth) files
http://docs.python.org/2/library/site.html [Ive not used them myself]
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Re: Split a list into two parts based on a filter?

[Jussi Piitulainen]

Roy Smith writes:

> We've been in the twilight zone for a while.  That's when the fun
> starts.  But, somewhat more seriously, I wonder what, exactly, it is
> that freaks people out about:
> 
>  [(new_songs if s.is_new() else old_songs).append(s) for s in songs]
> 
> Clearly, it's not the fact that it build and immediately discards a
> list, because that concern is addressed with the generator hack, and
> I think everybody (myself included) agrees that's just horrible.

I expect e(s) in [e(s) for s in songs] to be an expression that is
evaluated for its value and not for an effect. The comprehension
should stand for a list of those values. The one above violates this
expectation.

> Or, is it the use of the conditional to create the target for append()?  
> Would people be as horrified if I wrote:
> 
> for s in songs:
> (new_songs if s.is_new() else old_songs).append(s)
> 
> or even:
> 
> for s in songs:
> the_right_list = new_songs if s.is_new() else old_songs
> the_right_list.append(s)

These are fine.
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Re: ValueError: I/O operation on closed file. with python3

[Adam Mercer]

On Wed, Jun 12, 2013 at 2:26 AM, Peter Otten <__pete...@web.de> wrote:

> Applying these findings to your script:
>
> from contextlib import contextmanager
> try:
>   # python-2.x
>   from urllib2 import urlopen
>   from ConfigParser import ConfigParser
>
>   @contextmanager
>   def my_urlopen(url):
>   yield urlopen(url).fp
>
> except ImportError:
>   # python-3.x
>   from urllib.request import urlopen
>   from configparser import ConfigParser
>   import io
>
>   @contextmanager
>   def my_urlopen(url):
>   resp = urlopen(url)
>   yield io.TextIOWrapper(resp.fp)
>
> server='http://www.lsc-group.phys.uwm.edu/~ram/files'
>
> cp = ConfigParser()
> with my_urlopen('%s/latest.ini' % server) as fp:
> cp.readfp(fp)
>
> print(cp.get('version', '10.8'))
>
> I've run it with 2.6, 2.7, 3.2, and 3.3.

Thanks that's very helpful, I hadn't realised that .readfp() had been
deprecated.

Cheers

Adam
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Re: Python Magazine

[Chris Angelico]

On Sun, May 26, 2013 at 1:30 AM, Roy Smith  wrote:
> In article <51a0caac$0$30002$c3e8da3$54964...@news.astraweb.com>,
>  Steven D'Aprano  wrote:
>
>> On Sat, 25 May 2013 16:41:58 +1000, Chris Angelico wrote:
>>
>> > On Sat, May 25, 2013 at 4:38 PM, zoom  wrote:
>> >> But why would anyone want to use IPv6?
>> >
>> > I hope you're not serious :)
>>
>> He's planning to drop off the Internet once the IP address run out.
>
> We already have run out.  People have gotten so used to being behind NAT
> gateways they don't even understand how evil it is.  From my phone, I
> can call any other phone anywhere in the world.  But I can't talk
> directly to the file server in my neighbor's house across the street?

Of course, the shift from IPv4 and NAT to IPv6 and direct addressing
does shift the firewalling burden somewhat. Instead of "I'll forward
whatever ports I choose", it becomes "alright let's think about this
whole firewall thang". I'm not 100% confident that home-grade routers
will have proper firewall facilities in them; I suspect that moving
home users onto IPv6 may result in a spate of attacks. On the flip
side, it becomes less useful to simply port-scan across huge IP blocks
- bulk-attacking an IPv4 /24 block is easy, but spamming even a single
IPv6 /64 is practically impossible.

ChrisA
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Re: Debugging parallel nose tests?

[Jean-Michel Pichavant]

- Original Message -
> In article ,
>  Dave Angel  wrote:
> 
> > On 05/23/2013 09:09 AM, Roy Smith wrote:
> > >
> > >  
> > >
> > > nosetests --process-timeout=60 --processes=40 test_api.py
> > >
> > 
> > Do you have a 40-processor system?
> 
> No, but many of the tests are I/O bound.

Sorry to hijack your thread but what do you mean by that ? 
I have a lot of tests myself that spend most of their time writing and reading 
files. Should I try to multiprocess  them ?

JM


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Re: Simple algorithm question - how to reorder a sequence economically

[Dave Angel]

On 05/25/2013 09:49 PM, Roy Smith wrote:

In article <15a1bb3a-514c-454e-a966-243c84123...@googlegroups.com>,
  John Ladasky  wrote:


Because someone's got to say it... "The generation of random numbers is too
important to be left to chance." ‹ Robert R. Coveyou


Absolutely.  I know just enough about random number generation to
understand that I don't really know anything about it :-)

That being said, people who really care about random numbers, tend to
rely on some sort of physical process instead of computer algorithms.  A
classic example would be /dev/random.  A somewhat more fun example is
http://www.youtube.com/watch?v=7n8LNxGbZbs.  Something radioactive and a
geiger counter are a good source of randomness (time intervals between
decay events).




That's good unless you're a cat, and you belong to Schroedinger...


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Re: Simple algorithm question - how to reorder a sequence economically

[Chris Angelico]

On Fri, May 24, 2013 at 11:23 PM, Peter Brooks
 wrote:
> Actually, thinking about
> it, there is probably a source of non-algorithmically-derived 'random'
> numbers somewhere on the net that would do the job nicely.

True entropy is usually provided by a source such as /dev/random (on
Unix systems). It's sometimes referred to as "cryptographic"
randomness, due to its necessity in secure encryption work. There are
various ways to get this in a cross-platform way.

ChrisA
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Re: Survey of Python-in-browser technologies

[Dave Angel]

On 05/24/2013 08:38 PM, Carlos Nepomuceno wrote:



Date: Fri, 24 May 2013 17:11:18 -0700
Subject: Re: Survey of Python-in-browser technologies
From: drsali...@gmail.com
To: carlosnepomuc...@outlook.com
CC: python-list@python.org


Security is an important topic... but I'm not sure how I could gather
info about the security of these implementations.  Still, it's an idea
worth at least keeping in the back of my mind.


Security specialists opinions and facts about known vulnerabilities would be a 
start, although it may be time consuming to gather all data.

Just a thought! ;)  



Thank you for putting your response after the part you're quoting.  And 
for trimming out the irrelevant parts.


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RE: Python Magazine

[Carlos Nepomuceno]

I don't think IPv6 will change anything about NAPT usage. In fact, I guess, it 
will probably will make NAPT usage even more important and needed.  
   
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RE: Simple algorithm question - how to reorder a sequence economically

[Carlos Nepomuceno]

> Date: Fri, 24 May 2013 17:28:07 -0700
> Subject: Re: Simple algorithm question - how to reorder a sequence 
> economically
> From: peter.h.m.bro...@gmail.com
> To: python-list@python.org
[...]
> If the scenario could be modelled mathematically, then there'd be no
> point in writing the simulation.

I don't know what you mean. A computer simulation is an instance of a 
mathematical model. 
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Re: Harmonic distortion of a input signal

[Oscar Benjamin]

On 20 May 2013 00:36,   wrote:
> One more question. Function np.argmax returns max of non-complex numbers ?
> Because FFT array of my signal is complex.

Use abs() like in my example. This will give the absolute value of the
complex numbers:

>>> z = 1+1j
>>> z
(1+1j)
>>> abs(z)
1.4142135623730951


Oscar
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Re: Cutting a deck of cards

[Ian Kelly]

On Sun, May 26, 2013 at 12:16 PM, Carlos Nepomuceno
 wrote:
> list(range(13 * 4 * decks)) == range(13 * 4 * decks)

Not in Python 3.
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RE: Python Magazine

[Carlos Nepomuceno]

> Date: Sun, 26 May 2013 15:17:11 +1000
> Subject: Re: Python Magazine
> From: ros...@gmail.com
[...]
>> Blocking a whole network (/65) is totally undesirable and may even become 
>> illegal.
>
> Blocking a /64 is exactly the same as blocking a /32 with NAT behind
> it. And how could it be illegal? I provide service to those I choose
> to provide to.

I'm not a lawyer, so what I say about the IP blocking legal matter is just an 
opinion. I'm not responsible for any damages it may cause to anyone!!! lol

It just looks like those damn software disclaimers, doesn't it? ;)

Depending on the jurisdiction things maybe very different.

I've been told that in California it is really illegal to block IP addresses 
without a court order. Any Californians available to confirm that?

"The sender of information over the Internet is the "owner" of both the 
information and the IP address attached to the information. The practice of IP 
address blocking "records" the IP address and "destroys" the information in the 
message "without the intent or permission of the owner of the information," and 
"usurp[s] the normal operation of the . . computer network." Software designed 
to record IP addresses and use them to block messages is thus a "computer 
contaminant" according to the above definition. "

Source: 
http://im-from-missouri.blogspot.com.br/2007/05/ip-address-blocking-is-illegal-in.html


Also check California Penal Code Section 502, "Unauthorized Access To 
Computers, Computer Systems and Computer Data":
http://www.leginfo.ca.gov/cgi-bin/displaycode?section=pen&group=1-01000&file=484-502.9


The problem is serious and there are many cases, such as:
http://www.theregister.co.uk/2011/10/13/dutch_isp_accuses_spamhaus/


>> Currently it may not only happen at the target of the DDoS attack, but be 
>> spread all over the internet where block lists are enforced.
>>
>> I don't expect that to happen and if it happens I'm surely in favor of 
>> protection against this type of 'solution' because it will block not only 
>> malicious clients but potentially many other legitimate clients.
>
> Banning a wide netblock is of course going to lock out legit clients.
> But IP rotation means that can happen anyway. You block a single IPv4
> address that right now represents an abusive user; that user
> disconnects and reconnects, gets a new IP, and someone else gets the
> other one. Can happen all too easily. That's why IP-banning is at best
> a temporary solution anyway.

IP blocking isn't a perfect solution as you have confirmed. That's why using it 
is so problematic. It may hurt legitimate clients and other unrelated ones, 
while the "abusive user" as you said gets out unharmed. 
  
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Re: Cutting a deck of cards

[Ian Kelly]

On Sun, May 26, 2013 at 12:17 PM, RVic  wrote:
> Ah, brilliant -- yes, this is so much more elegant in Python:
>
> #now cut the cards
> x = random.randrange(2,range(13 * 4 * decks))
> cards = cards[x:]+cards[:x]

Or if for some reason you want to do it in place:

cards[x:], cards[:x] = cards[:x], cards[x:]

But note that the order of assignments is subtly important there, so
unless you have a good reason for doing that, it's probably better
just to create a new list for clarity.
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RE: Cutting a deck of cards

[Carlos Nepomuceno]

> From: usenetm...@solar-empire.de
> Subject: Re: Cutting a deck of cards
> Date: Sun, 26 May 2013 22:13:55 +0200
> To: python-list@python.org
>
> Carlos Nepomuceno  wrote:
>> 
>>> From: usenetm...@solar-empire.de
>> [...]
>>> Not in Python3.x
>> decks = 6
>> list(range(13 * 4 * decks)) == range(13 * 4 * decks)
>>> False
>>
>> What does "list(range(13 * 4 * decks))" returns in Python 3?
>
> A list of course. But Py3 range is very similar to Py2 xrange, it
> returns a range object.
>
> Adiaŭ
> Marc

What list? '[[0,1,2,...]]' or '[0,1,2,...]'? If it's the later then it's no 
different than what range() returns in Python 2.7.5!
  
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RE: Cutting a deck of cards

[Carlos Nepomuceno]

> To: python-list@python.org
> From: breamore...@yahoo.co.uk
[...]
> See this
> http://docs.python.org/3/whatsnew/3.3.html#pep-397-python-launcher-for-windows
>
> --
> If you're using GoogleCrap™ please read this
> http://wiki.python.org/moin/GoogleGroupsPython.
>
> Mark Lawrence

Piece of cake! So, is there any risk of breaking anything if I install a new 
package after having both Puthon 2 and 3 installed?

How do I choose which one will run the package? Will the package handle the 
settings accordingly or will I need to setup manually?  
  
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Re: Cutting a deck of cards

[Chris Angelico]

On Mon, May 27, 2013 at 4:16 AM, Carlos Nepomuceno
 wrote:
> list(range(13 * 4 * decks)) == range(13 * 4 * decks)
>
> ;)

Not in Python 3.

ChrisA
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RE: Encodign issue in Python 3.3.1 (once again)

[Carlos Nepomuceno]

> Date: Tue, 28 May 2013 08:18:06 +1000
> Subject: Re: Encodign issue in Python 3.3.1 (once again)
> From: ros...@gmail.com
> To: python-list@python.org
[...]
>
> This is something that's utterly trivial, yet a window to your mind.
> It's like boarding an airliner and finding coffee stains on the
> flip-down trays - the plane flies just fine with those stains, yet the
> impression they give is that the crew don't care about engine
> maintenance either.
>
> ChrisA


Stain Is Too Damn High!!! lol

That's my party man!!! :) 
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RE: How to: Setuptools

[Carlos Nepomuceno]

> Date: Mon, 27 May 2013 21:26:21 -0700
> Subject: Re: How to: Setuptools
> From: rustompm...@gmail.com
> To: python-list@python.org
>
> On May 28, 9:09 am, Carlos Nepomuceno 
> wrote:
>> 
>>
>>> Date: Mon, 27 May 2013 20:54:53 -0700
>>> Subject: Re: How to: Setuptools
>>> From: rustompm...@gmail.com
>> [...]
>>
>>> Oooff! Talk of using sledgehammers to crack nuts...
>>
>>> All that is needed is to visithttp://peak.telecommunity.com/dist/ez_setup.py
>>> with the browser and to save the file!!
>>
>> Can you show me how to do that from a batch file? Please...
>
> What in the OP's question translates into a need for a batch-file?
>
> And you are proposing that he downloads curl just to write that batch-
> file?!?!
>
> How come that proposal is not subject to the same requirement, viz. I
> dont see in your recipe any:
> "Here-is-a-batchfile-to-download-curl-without-curl?"
> --
> http://mail.python.org/mailman/listinfo/python-list

So, you don't know how to download from a batch file?   
  
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RE: Total Beginner - Extracting Data from a Database Online (Screenshot)

[Carlos Nepomuceno]

> Date: Tue, 28 May 2013 07:40:07 +0100 
> Subject: RE: Total Beginner - Extracting Data from a Database Online  
> (Screenshot) 
> From: pconn...@gmail.com 
[...]
> > 
> > c11 = [tables[0][r][10] for r in range(len(tables[0]))] 
>  
> Or rather: 
>  
> c11 = [row[10] for row in tables[0]] 
>  
> In most cases, range(len(x)) is a sign that you're doing it wrong :)

Indeed! Much better that way! \o  
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Re: Python Magazine

[Jonas Geiregat]

On 31 May 2013, at 13:11, DRJ Reddy wrote:

> Hello all,
>Was busy with work. Finally finished the job of registering the domain 
> name.
> Will be live soon. The url is http://pythonmagazine.org. Hope we will be live 
> soon.


I was surprised when I saw it  is running on ASP.NET, can this be ?

Server: Microsoft-IIS/7.0
Vary: Accept-Encoding
X-Pingback: http://pythonmagazine.org/xmlrpc.php
X-Powered-By: ASP.NET

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Re: Encodign issue in Python 3.3.1 (once again)

[Daniel Gagliardi Ramos]

don't ya have something intelligent to say motherfucker?


2013/5/28 rusi 

> On May 28, 10:55 am, Νίκος Γκρ33κ  wrote:
> > Ôç Ôñßôç, 28 ÌáÀïõ 2013 1:18:06 ð.ì. UTC+3, ï ÷ñÞóôçò Chris Angelico
> Ýãñáøå:
> >
> > > You're effectively asking people to put in a few minutes' work,
> > > sometimes quite a few minutes, to help you. Is it too much to hope
> > > that you'll spend one more minute on your posts?
> >
> > No it is not, you are right, i should be more careful when typing and
> spend some time to correct before i send my responses. I promise i will not
> overlook this as well as the blank line google imposes.
> >
> > As fo my initial question any comments-remarks?
>
> You say you should be more careful to correct your typing and
> 'promise' to not overlook this.
> Your next line has a 'fo' instead of a 'for'
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>
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RE: Changing filenames from Greeklish => Greek (subprocess complain)

[Carlos Nepomuceno]

> To: python-list@python.org
> From: breamore...@yahoo.co.uk
> Subject: Re: Changing filenames from Greeklish => Greek (subprocess complain)
> Date: Sun, 2 Jun 2013 15:51:31 +0100
[...]
> "Steve is going for the pink ball - and for those of you who are
> watching in black and white, the pink is next to the green." Snooker
> commentator 'Whispering' Ted Lowe.
>
> Mark Lawrence
>
> --
> http://mail.python.org/mailman/listinfo/python-list

le+666l   
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[ANN] pypiserver 1.1.1 - minimal private pypi server

[Ralf Schmitt]

Hi,

I've just uploaded pypiserver 1.1.1 to the python package index.

pypiserver is a minimal PyPI compatible server. It can be used to serve
a set of packages and eggs to easy_install or pip.

pypiserver is easy to install (i.e. just 'pip install pypiserver'). It
doesn't have any external dependencies.

https://pypi.python.org/pypi/pypiserver/ should contain enough
information to easily get you started running your own PyPI server in a
few minutes.

The code is available on github: https://github.com/schmir/pypiserver

Changes in this version
---
- add 'overwrite' option to allow overwriting existing package
  files (default: false)
- show names with hyphens instead of underscores on the "/simple"
  listing
- make the standalone version work with jython 2.5.3
- upgrade waitress to 0.8.5 in the standalone version
- workaround broken xmlrpc api on pypi.python.org by using HTTPS

-- 
Cheers
Ralf
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RE: Python #ifdef

[Carlos Nepomuceno]

> Date: Mon, 3 Jun 2013 12:05:49 +1000
> Subject: Re: Python #ifdef
> From: ros...@gmail.com
> To: python-list@python.org
[...]
> Ah. I actually wasn't aware of m4's use with sendmail. I first met it
> as the aforementioned PHP preprocessor, simply by Googling for
> something along the lines of "generic preprocessor". First hit solved
> my problems.
>
> ChrisA

Why didn't you use something like EZT[1]?

[1] https://code.google.com/p/ezt/
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Re: User Input

[Dave Angel]

On 05/30/2013 10:03 AM, Eternaltheft wrote:

do you think ti would be better if i call drawBoard?



Better is meaningless without context.

Are you being charged per keystroke?

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Re: PyWart: The problem with "print"

[Joshua Landau]

On 4 June 2013 14:35, Mark Lawrence  wrote:
> On 04/06/2013 14:29, rusi wrote:
>> The Clash of the Titans
>>
>> Lé jmf chârgeth with mightƴ might
>> And le Mond underneath trembleth
>> Now RR mounts his sturdy steed
>> And the windmill yonder turneth
>>
>
> +1 funniest poem of the week :)

Week? Do we do this every Tuesday?

I vote all-time best post for python-list@python.org.
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Re: Short-circuit Logic

[Oscar Benjamin]

On 30 May 2013 22:03, Carlos Nepomuceno  wrote:
>> Here's another way, mathematically equivalent (although not necessarily
>> equivalent using floating point computations!) which avoids the divide-by-
>> zero problem:
>>
>> abs(a - b) < epsilon*a
>
> That's wrong! If abs(a) < abs(a-b)/epsilon you will break the commutative law.

There is no commutative law for relative tolerance floating point
comparisons. If you want to compare with a relative tolerance then you
you should choose carefully what your tolerance is to be relative to
(and how big your relative tolerance should be).

In some applications it's obvious which of a or b you should use to
scale the tolerance but in others it is not or you should compare with
something more complex. For an example where it is obvious, when
testing numerical code I might write something like:

eps = 1e-7
true_answer = 123.4567879
estimate = myfunc(5)
assert abs(estimate - true_answer) < eps * abs(true_answer)


Oscar
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Re: "Don't rebind built-in names*" - it confuses readers

[Mark Janssen]

> list = []
> Reading further, one sees that the function works with two lists, a list of
> file names, unfortunately called 'list',

That is very good advice in general:  never choose a variable name
that is a keyword.
-- 
MarkJ
Tacoma, Washington
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RE: Short-circuit Logic

[Carlos Nepomuceno]

> From: oscar.j.benja...@gmail.com
> Date: Thu, 30 May 2013 23:57:28 +0100
> Subject: Re: Short-circuit Logic
> To: carlosnepomuc...@outlook.com
> CC: python-list@python.org
>
> On 30 May 2013 22:03, Carlos Nepomuceno  wrote:
>>> Here's another way, mathematically equivalent (although not necessarily
>>> equivalent using floating point computations!) which avoids the divide-by-
>>> zero problem:
>>>
>>> abs(a - b) < epsilon*a
>>
>> That's wrong! If abs(a) < abs(a-b)/epsilon you will break the commutative 
>> law.
>
> There is no commutative law for relative tolerance floating point
> comparisons. If you want to compare with a relative tolerance then you
> you should choose carefully what your tolerance is to be relative to
> (and how big your relative tolerance should be).

Off course there is! It might not suite your specific needs though.

I'll just quote Knuth because it's pretty damn good:

"A. An axiomatic approach. Although the associative law is not valid, the 
commutative law

u (+) v == v (+) u (2)

does hold, and this law can be a valuable conceptual asset in programming and 
in the analysis of programs. This example suggests that we should look for
important laws that are satified by (+), (-), (*), and (/); it is not 
unreasonable to say that floating point routines should be designed to preserve 
as many of the ordinary mathematical laws as possible. If more axioms are 
valid, it becomes easier to write good programs, and programs also become more 
portable from
machine to machine."
TAOCP, Vol .2, p. 214


> In some applications it's obvious which of a or b you should use to
> scale the tolerance but in others it is not or you should compare with
> something more complex. For an example where it is obvious, when
> testing numerical code I might write something like:
>
> eps = 1e-7
> true_answer = 123.4567879
> estimate = myfunc(5)
> assert abs(estimate - true_answer) < eps * abs(true_answer)
>
>
> Oscar   
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Re: "Don't rebind built-in names*" - it confuses readers

[Chris Angelico]

On Tue, Jun 11, 2013 at 1:30 PM, rusi  wrote:
> Or by example:
>
> def foo(x)...
> def bar(x,y)...
> there is no reason to confuse the two xes.
>
> Whereas
>
> x = ...
> def foo(x)...
> Now there is!
>
> The first should be encouraged, the second discouraged.

Again, there can be good reason for it, such as snapshotting globals:

qwer=123
def asdf(qwer=qwer):
print("qwer",qwer)

asdf()
qwer=234
asdf()

Done for performance (avoiding lookups), could also be done for
stability (as depicted here) though I've never seen it needed for
that.

ChrisA
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Re: Changing filenames from Greeklish => Greek (subprocess complain)

[Gene Heskett]

On Sunday 02 June 2013 13:10:30 Chris Angelico did opine:

> On Mon, Jun 3, 2013 at 2:21 AM, حéêüëلïٍ تï‎ٌلٍ  
wrote:
> > Paying for someone to just remove a dash to get the script working is
> > too much to ask for
> 
> One dash: 1c
> Knowing where to remove it: $99.99
> Total bill: $100.00
> 
> Knowing that it ought really to be "utf8mb4" and giving hints that the
> docs should be read rather than just taking this simple example and
> plugging it in: Priceless.
> 
> ChrisA

Chuckle.  Chris, I do believe you have topped yourself.  Love it.

Cheers, Gene
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-Ed Howdershelt (Author)
My web page:  is up!
My views 

Unnamed Law:
If it happens, it must be possible.
A pen in the hand of this president is far more
dangerous than 200 million guns in the hands of
 law-abiding citizens.
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Re: Beginner question

[Chris Angelico]

On Tue, Jun 4, 2013 at 9:53 PM, Carlos Nepomuceno
 wrote:
> Are there any benefits from using dict() instead of {}?

Not for what you're doing, but you can use dict() with an iterable.
Most of the time, use the literal.

ChrisA
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RE: Changing filenames from Greeklish => Greek (subprocess complain)

[Carlos Nepomuceno]

' Server: ApacheBooster/1.6'  isn't a signature of httpd. I think you are 
really running something different.

> From: nob...@nowhere.com
> Subject: Re: Changing filenames from Greeklish => Greek (subprocess complain)
> Date: Tue, 4 Jun 2013 14:01:48 +0100
> To: python-list@python.org
> 
> On Tue, 04 Jun 2013 00:58:42 -0700, Νικόλαος Κούρας wrote:
> 
> > Τη Τρίτη, 4 Ιουνίου 2013 10:39:08 π.μ. UTC+3, ο
> > χρήστης Nobody έγραψε:
> > 
> >> Chrome didn't choose ISO-8859-1, the server did; the HTTP response says:
> >>   Content-Type: text/html;charset=ISO-8859-1
> > 
> > From where do you see this
> 
> $ wget -S -O - http://superhost.gr/data/apps/
> --2013-06-04 14:00:10--  http://superhost.gr/data/apps/
> Resolving superhost.gr... 82.211.30.133
> Connecting to superhost.gr|82.211.30.133|:80... connected.
> HTTP request sent, awaiting response... 
>   HTTP/1.1 200 OK
>   Server: ApacheBooster/1.6
>   Date: Tue, 04 Jun 2013 13:00:19 GMT
>   Content-Type: text/html;charset=ISO-8859-1
>   Transfer-Encoding: chunked
>   Connection: keep-alive
>   Vary: Accept-Encoding
>   X-Cacheable: YES
>   X-Varnish: 2000177813
>   Via: 1.1 varnish
>   age: 0
>   X-Cache: MISS
> 
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Re: Apache and suexec issue that wont let me run my python script

[Joel Goldstick]

On Tue, Jun 4, 2013 at 1:12 PM, Νικόλαος Κούρας wrote:

> Τη Τρίτη, 4 Ιουνίου 2013 8:09:18 μ.μ. UTC+3, ο χρήστης Chris Angelico
> έγραψε:
> > On Wed, Jun 5, 2013 at 3:02 AM, Νικόλαος Κούρας 
> wrote:
> >
> > > I'm willing to let someone with full root access to my webhost to see
> thigns from the inside.
> >
> > >
> >
> > > Does someone want to take o allok or at elast tell me what else i need
> to try, that hasn't been tried out yet?
> >
> >
> >
> > You need to read up on what happens when you enter Dummy Mode and give
> >
> > someone full root access to your web host. You really REALLY need to
> >
> > understand what that means before you offer random strangers that kind
> >
> > of access to someone else's data.
> >
> >
> >
> > I've half a mind to take you up on your offer, then go look for
> >
> > personal and private info from your clients, and email it to them
> >
> > (along with a link to this thread) to point out what's going on.
> >
> >
> >
> > ChrisA
>
> I know what full root access mean.
> I also trust you.
> I'm hopeless man, its 1 week now dealing with this.
> --
> http://mail.python.org/mailman/listinfo/python-list
>

I trust you too Chris!


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http://joelgoldstick.com
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Re: A few questiosn about encoding

[Dave Angel]

On 06/12/2013 05:24 AM, Steven D'Aprano wrote:

On Wed, 12 Jun 2013 09:09:05 +, Νικόλαος Κούρας wrote:


Isn't 14 bits way to many to store a character ?


No.

There are 1114111 possible characters in Unicode. (And in Japan, they
sometimes use TRON instead of Unicode, which has even more.)

If you list out all the combinations of 14 bits:

   00
   01
   10
   11
[...]
   10
   11

you will see that there are only 32767 (2**15-1) such values. You can't
fit 1114111 characters with just 32767 values.




Actually, it's worse.  There are 16536 such values (2**14), assuming you 
include null, which you did in your list.


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Re: How to get an integer from a sequence of bytes

[Ian Kelly]

On Tue, Jun 4, 2013 at 3:49 PM, Chris Angelico  wrote:
> So... can we cite http://xkcd.com/859/ in two threads at once, or does
> that create twice as much tension?

No, you just look at one of them upside-down, and then they cancel
each other out.
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Re: A certainl part of an if() structure never gets executed.

[Neil Cerutti]

On 2013-06-12, Chris Angelico  wrote:
> On Wed, Jun 12, 2013 at 5:45 PM,  ??  wrote:
>> First of all i have changed the code to the following because using a
>> regex
>> to detect a single char was an overkill.
>>
>> if '=' not in name and '=' not in month and '=' not in year:
>
> It'd be courteous to acknowledge those who made that
> suggestion, most notably alex23 who posted it in almost that
> exact form.

Also, I wish he would stop fudging his From info. I've got
something like 8 entries for this ass in my killfile, and it
seems I need a new one every day.

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Pywart: The problem with "Rick Johnson"

[Mike Hansen]

Is "Rick Johnson" the alter ego of Xah Lee, or is he the result of a cross 
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Re: A few questiosn about encoding

[Ulrich Eckhardt]

Am 12.06.2013 13:23, schrieb Νικόλαος Κούρας:

So, how many bytes does UTF-8 stored for codepoints > 127 ?


What has your research turned up? I personally consider it lazy and 
respectless to get lots of pointers that you could use for further 
research and ask for more info before you even followed these links.




example for codepoint 256, 1345, 16474 ?


Yes, examples exist. Gee, if there only was an information network that 
you could access and where you could locate information on various 
programming-related topics somehow. Seriously, someone should invent 
this thing! But still, even without it, you have all the tools (i.e. 
Python) in your hand to generate these examples yourself! Check out ord, 
bin, encode, decode for a start.



Uli

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Re: Apache and suexec issue that wont let me run my python script

[Antoon Pardon]

Op 05-06-13 11:06, Νικόλαος Κούρας schreef:
> Τη Τετάρτη, 5 Ιουνίου 2013 11:59:28 π.μ. UTC+3, ο χρήστης alex23 έγραψε:
>> On Jun 5, 6:41 pm, Chris Angelico  wrote:
>>
>>> This matter is far more serious than you seem to be giving it
>>> consideration for. You complain that I violated your trust; you
>>> violated the trust of people who are paying you money.
>>
>>
>> I think the term I'm looking for here is: EPIC WIN :D
> I didnt violate anything. Chris violated my treust.
> There would have been no violation if he just look into en encoding issue and 
> not meddled with my customers mail and data.

Yes you violated peoples trust. People trust you to act in a way to keep
their data safe. Mailing your root password to someone you only know
from a mailinglist/newsgroup is acting irresponsibly. That Chris has
violated your trust, doesn't make your own irresponsible behaviour
dissappear. Not only that, you made it public you would continue to act
the same way in the future. If I had trusted you with my data, I would
have felt my trust to be violated.

Your actions are similar to someone who keeps a credit card for an
organisation, gives the security code to a stranger and then complains
the stranger moved a lot of money from one bank account to another
(although all owned by you). Sure the stranger had no business doing
that, but you sure were violating the trust of the organisation by acting
so irresponsibly.

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Re: Re-using copyrighted code

[Mark Janssen]

>> At least partially, my confusion seems to be caused by the dichotomy of
>> the concepts of copyright and license. How do these relate to each other?
>
> A license emerges out of the commercial domain is purely about
> commercial protections.

I should clarify, that "commercial protections" here means *money*,
not other potentially legal assets.  As soon as money is exchange you
entangle yourself with their domain.  Otherwise, as long as you give
credit, you're really quite safe, from a Constitutional perspective.

-- 
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Tacoma, Washington
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Re: .mat files processing in Python

[D'Arcy J.M. Cain]

On Mon, 27 May 2013 13:43:36 -0700 (PDT)
Romila Anamaria  wrote:
> I am beginner
> in Python programming

Are you a beginner in using the Internet too?  You just sent a 2.69MB
message to a mailing list.  You shouldn't send huge files like that in
email at all but especially not to a mailing list that gets archived.
Please don't ever do that again.

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Re: How to get an integer from a sequence of bytes

[Fábio Santos]

On 5 Jun 2013 06:23, "Tim Roberts"  wrote:
> A single machine word was 60 bits, so a single register read got you 10
> characters.

10 characters! Now that sounds like it's enough to actually store a word.
However long words can inadverten be cropped.
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Re: A certainl part of an if() structure never gets executed.

[Νικόλαος Κούρας]

On 12/6/2013 2:49 μμ, F�bio Santos wrote:


On 12 Jun 2013 12:08, " ��" mailto:supp...@superhost.gr>> wrote:
 >
 > Oh my God!
 >
 > i just need to do this:
 >
 >
 > for i, month in enumerate( months ):
 > � � � � print(' %s ' % (month, month) )

Usually what goes in  is an ID of something. You
should keep using (i, month) and then do months[id] to get the month string.

Also, tuples aren't traditionally used for this. Normally you'd use a list.



You were right, i counter needed to signify the value: I just made it 
work as i wanted to!



print('')
for i, month in enumerate( months ):
print(' %s ' % (i, month) )
if month == '0':
month = '=='






# 
=

# find & display requested info based on name/month/year criteria
# 
=

if( seek ): 
try:
if '=' not in ( name or month or year ):
			cur.execute( '''SELECT * FROM works WHERE clientsID = (SELECT id FROM 
clients WHERE name = %s) and MONTH(lastvisit) = %s and YEAR(lastvisit) = 
%s ORDER BY lastvisit ASC''', (name, month, year) )

elif '=' not in ( month or year ):
			cur.execute( '''SELECT * FROM works WHERE MONTH(lastvisit) = %s and 
YEAR(lastvisit) = %s ORDER BY lastvisit ASC''', (month, year) )

elif '=' not in year:
			cur.execute( '''SELECT * FROM works WHERE YEAR(lastvisit) = %s ORDER 
BY lastvisit ASC''', year )


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Re: Turnign greek-iso filenames => utf-8 iso

[Νικόλαος Κούρας]

On 12/6/2013 2:32 μμ, Νικόλαος Κούρας wrote:

On 12/6/2013 12:37 μμ, Steven D'Aprano wrote:

On Wed, 12 Jun 2013 12:24:24 +0300, Νικόλαος Κούρας wrote:




[1] Correction. While I was typing this, it came good, for about 20
seconds, and displayed a hideously ugly background pattern and a cute
smiling face waving, and then broke again.



Ah sorry Steven i made the change of:

host = socket.gethostbyaddr( os.environ['REMOTE_ADDR'] )[0] or 'UnResolved'

to metrites.py isntead of files.py

now i have made both chnages.

you can see the webpage now, eys the one with the cure smile face.

behidn that we should beeen seeing all the files in a table like format
for uses to downlaod, instead not a single file is being displayed.

here is the print process., actually here is what i have up until now
after modifications for you to take an overall look.

#
=

# Convert wrongly encoded filenames to utf-8
#
=

path = b'/home/nikos/public_html/data/apps/'
filenames = os.listdir( path )

utf8_filenames = []

for filename in filenames:
 # Compute 'path/to/filename'
 filename_bytes = path + filename
 encoding = guess_encoding( filename_bytes )

 if encoding == 'utf-8':
 # File name is valid UTF-8, so we can skip to the next file.
 utf8_filenames.append( filename_bytes )
 continue
 elif encoding is None:
 # No idea what the encoding is. Hit it with a hammer until it
stops moving.
 filename = filename_bytes.decode( 'utf-8', 'xmlcharrefreplace' )
 else:
 filename = filename_bytes.decode( encoding )

 # Rename the file to something which ought to be UTF-8 clean.
 newname_bytes = filename.encode('utf-8')
 os.rename( filename_bytes, newname_bytes )
 utf8_filenames.append( newname_bytes )

 # Once we get here, the file ought to be UTF-8 clean and the
Unicode name ought to exist:
 assert os.path.exists( newname_bytes.decode('utf-8') )


# Switch filenames from utf8 bytestrings => unicode strings
filenames = []

for utf8_filename in utf8_filenames:
 filenames.append( utf8_filename.decode('utf-8') )

# Check the presence of a database file against the dir files and delete
record if it doesn't exist
cur.execute('''SELECT url FROM files''')
data = cur.fetchall()

for url in data:
 if url not in filenames:
 # Delete spurious
 cur.execute('''DELETE FROM files WHERE url = %s''', url )


#
=

# Display ALL files, each with its own download button
#
=

print('''
  
  
''')

try:
 cur.execute( '''SELECT * FROM files ORDER BY lastvisit DESC''' )
 data = cur.fetchall()

 for row in data:
 (filename, hits, host, lastvisit) = row
 lastvisit = lastvisit.strftime('%A %e %b, %H:%M')

 print('''
 
 

%s 
%s 
%s 
 
 
 ''' % (filename, hits, host, lastvisit) )
 print( '' )
except pymysql.ProgrammingError as e:
 print( repr(e) )

sys.exit(0)

==
ima happy that at elaST IT DOES NOT ERRIGN OUT!



Can you shed some ligth please as to what might the problem be and its 
not displayign the filenames sicn ethey are utf8 encoded correctly?


Something you want me to try?
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Re: Simple algorithm question - how to reorder a sequence economically

[Robert Kern]

On 2013-05-24 14:43, Chris Angelico wrote:

On Fri, May 24, 2013 at 11:23 PM, Peter Brooks
 wrote:

Actually, thinking about
it, there is probably a source of non-algorithmically-derived 'random'
numbers somewhere on the net that would do the job nicely.


True entropy is usually provided by a source such as /dev/random (on
Unix systems). It's sometimes referred to as "cryptographic"
randomness, due to its necessity in secure encryption work. There are
various ways to get this in a cross-platform way.


os.random() and os.urandom(), particularly.

--
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco

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Re: PYTHONPATH: dev and prod

[jacopo]

> 1. How you run -- 'launch' -- the code -- from py and from prod
when I have to test I use "python any_script.py"  but in production there is a 
c++ program that is able to wrap and run python code (the technical details are 
a bit beyond my knowledge)
 
> 2. What error you get
when I run as "python any_script.py" I get
"ValueError: Attempted relative import in non-package"
I have found this explanation:
http://stackoverflow.com/questions/11536764/attempted-relative-import-in-non-package-even-with-init-py
So I have added at the top of my module:

if __name__=="__main__" and __package__ is None:
 __package__="myscripts"
from ..mylib import MyClass

and I get the error:
SystemError: Parent module 'mylib' not loaded, canno perform relative import

 
> 3. Did you try bundling your modules into a package? What problem
> happened?
What does it mean? what does build mean in this contest? I am not compiling, I 
just write the .py files.
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Re: py_compile vs. built-in compile, with __future__

[Neil Cerutti]

On 2013-06-11, dhyams  wrote:
>> You would use StringIO instead of writing a temp file.
>
> I don't think that would work...py_compile takes a filename as
> input, not a file object.

Dang. Sorry for the misinfo.

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Re: A certainl part of an if() structure never gets executed.

[Mark Lawrence]

On 12/06/2013 14:05, Neil Cerutti wrote:



Also, I wish he would stop fudging his From info. I've got
something like 8 entries for this ass in my killfile, and it
seems I need a new one every day.



An ass eh, when did he get promoted to that position?

--
"Steve is going for the pink ball - and for those of you who are 
watching in black and white, the pink is next to the green." Snooker 
commentator 'Whispering' Ted Lowe.


Mark Lawrence

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Re: "Don't rebind built-in names*" - it confuses readers

[Grant Edwards]

On 2013-06-11, Mark Janssen  wrote:
>> list = []
>> Reading further, one sees that the function works with two lists, a list of
>> file names, unfortunately called 'list',
>
> That is very good advice in general:  never choose a variable name
> that is a keyword.

You can't choose a vriable name that is a keyword: the compiler won't
allow it.

"list" isn't a keyword.

-- 
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  at   asked for my Neutron Bomb
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Re: How to get an integer from a sequence of bytes

[Grant Edwards]

On 2013-06-12, F?bio Santos  wrote:
> On 5 Jun 2013 06:23, "Tim Roberts"  wrote:
>> A single machine word was 60 bits, so a single register read got you 10
>> characters.
>
> 10 characters! Now that sounds like it's enough to actually store a word.
> However long words can inadverten be cropped.

Only the first 10 characters in variable names were significant when
you wrote Pascal programs (I don't remember if that was true for
FORTRAN, but I bet it was).

-- 
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  at   NUCLEAR WASTE DUMP near
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Re: Turnign greek-iso filenames => utf-8 iso

[Mark Lawrence]

On 12/06/2013 13:42, Νικόλαος Κούρας wrote:


Something you want me to try?


I'd suggest suicide but that would no doubt start another stream of 
questions along the lines of "How do I do it?".


--
"Steve is going for the pink ball - and for those of you who are 
watching in black and white, the pink is next to the green." Snooker 
commentator 'Whispering' Ted Lowe.


Mark Lawrence

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Re: A certainl part of an if() structure never gets executed.

[Neil Cerutti]

On 2013-06-12, Grant Edwards  wrote:
> On 2013-06-12, Tim Roberts  wrote:
>>  ??  wrote:
>>>
>>>[code]
>>> if not re.search( '=', name ) and not re.search( '=', month ) 
>>> and not re.search( '=', year ):
>>> cur.execute( '''SELECT * FROM works WHERE clientsID = 
>>> (SELECT id FROM clients WHERE name = %s) and MONTH(lastvisit) = %s and 
>>> YEAR(lastvisit) = %s ORDER BY lastvisit ASC''', (name, month, year) )
>>> elif not re.search( '=', month ) and not re.search( '=', year ):
>>> cur.execute( '''SELECT * FROM works WHERE 
>>> MONTH(lastvisit) = %s and YEAR(lastvisit) = %s ORDER BY lastvisit ASC''', 
>>> (month, year) )
>>> elif not re.search( '=', year ):
>>> cur.execute( '''SELECT * FROM works WHERE 
>>> YEAR(lastvisit) = %s ORDER BY lastvisit ASC''', year )
>>
>> There is so much you didn't tell us here, including which database you are
>> using.
>
> Are you guys _still_ on Nikos hook?
>
> [No, I don't really think he's trolling, but it would be really
> impressive if he were.]

He's definitely trolling. I can't think of any other reason to
make it so hard to kill-file himself.

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Re: A certainl part of an if() structure never gets executed.

[Grant Edwards]

On 2013-06-12, Tim Roberts  wrote:
>  ??  wrote:
>>
>>[code]
>>  if not re.search( '=', name ) and not re.search( '=', month ) 
>> and not re.search( '=', year ):
>>  cur.execute( '''SELECT * FROM works WHERE clientsID = 
>> (SELECT id FROM clients WHERE name = %s) and MONTH(lastvisit) = %s and 
>> YEAR(lastvisit) = %s ORDER BY lastvisit ASC''', (name, month, year) )
>>  elif not re.search( '=', month ) and not re.search( '=', year ):
>>  cur.execute( '''SELECT * FROM works WHERE 
>> MONTH(lastvisit) = %s and YEAR(lastvisit) = %s ORDER BY lastvisit ASC''', 
>> (month, year) )
>>  elif not re.search( '=', year ):
>>  cur.execute( '''SELECT * FROM works WHERE 
>> YEAR(lastvisit) = %s ORDER BY lastvisit ASC''', year )
>
> There is so much you didn't tell us here, including which database you are
> using.

Are you guys _still_ on Nikos hook?

[No, I don't really think he's trolling, but it would be really
impressive if he were.]

Anyway, I salute your patience.

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  at   sensuous GIRAFFE, CAVORTING
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Re: Why doesn't nose see my plugin? (FIXED)

[Roy Smith]

In article ,
Roy Smith   wrote:

>setup(
>name = "Mongo Reporter",
>version = "0.0",
>entry_points = {
>'nose.plugins.1.10': ['mongoreporter = mongo_reporter.MongoReporter'],
>},
>)

The problem turned out to be the syntax of the entry_point
declaration.  It should have been "mongo_reporter:MongoReporter"
(colon, not dot, delimiting the module from the class).

Still strugging to get my head fully around setuptools :-)
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Re: PYTHONPATH: dev and prod

[rusi]

On Jun 12, 6:29 pm, jacopo  wrote:
> > 1. How you run -- 'launch' -- the code -- from py and from prod
>
> when I have to test I use "python any_script.py"  but in production there is 
> a c++ program that is able to wrap and run python code (the technical details 
> are a bit beyond my knowledge)
>
> > 2. What error you get
>
> when I run as "python any_script.py" I get
> "ValueError: Attempted relative import in non-package"
> I have found this 
> explanation:http://stackoverflow.com/questions/11536764/attempted-relative-import...
> So I have added at the top of my module:
>
> if __name__=="__main__" and __package__ is None:
>      __package__="myscripts"
> from ..mylib import MyClass
>
> and I get the error:
> SystemError: Parent module 'mylib' not loaded, canno perform relative import
>
> > 3. Did you try bundling your modules into a package? What problem
> > happened?
>
> What does it mean? what does build mean in this contest? I am not compiling, 
> I just write the .py files.

I mean use a python package to wrap the modules.
Roughly that means have a file named __init__.py in the root of your
modules directory.
For the details see http://docs.python.org/2/tutorial/modules.html#packages

More intricacies I dont know. Hopefully someone who knows better can
answer
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