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Funny Christmas videos / Crazy Christmas Kick - Watch Santa Claus!
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Re: How to display Chinese in a list retrieved from database via python

[zxo102]

On 12月25日, 下午3时35分, "Chris Rebert"  wrote:
> On Wed, Dec 24, 2008 at 11:29 PM, zxo102  wrote:
> > Hi,
> >   I retrieve some info in Chinese from postgresql  and assign it to a
> > variable 'info' defined in javascript of a html page:
> >   var info = ['\xd6\xd0\xce\xc4','\xd6\xd0\xce\xc4','\xd6\xd0\xce
> > \xc4']
> >  But I want it to be
> >   var info = ['中文','中文','中文']
> >  since in html pages (via javascript), the items in chinese out of the
> > former :['\xd6\xd0\xce\xc4','\xd6\xd0\xce\xc4','\xd6\xd0\xce\xc4'] can
> > not be displayed correctly when it is inserted into a html page. If
> > the list is  var info = ['中文','中文','中文'] , then everything works
> > fine.
>
> >  Anybody knows how to solve this problem?
>
> Upgrading to Python 2.6 would probably be beneficial due to its better
> handling of Unicode.
> Also, posting some of the actual code you're using (to generate
> JavaScript, I guess?) would definitely help.
>
> Merry Christmas,
> Chris
>
> --
> Follow the path of the Iguana...http://rebertia.com

Hi Chris:

I have to use python2.4 since many other python packages have not been
updated to 2.6.
Here is my demo:
I create a table in postgresql:

 create table my_table (
id   serial,
name char(20),
phone char(20)
 );

and insert two records into the table
(4, '中文', '133499555')
(5, '中文', '3434343434343')


I would like to generate a html page dynamically, here is the demo
script


def do_search(a):
 # 调用ODBC模块
 import odbc
 # 通过ODBC中的"my_odbc"和相应的数据库建立连接
 cc = odbc.odbc('dsn=wisco')
 cursor1 = cc.cursor()
 # 将数据存入数据库中的"my_table"
 #cursor1.execute("select * from my_table where name = '%s' "%a)
 cursor1.execute("select * from my_table where name like '%%%s%%'
"%a)
 rr = cursor1.fetchall()
 # 显示用户查到的数据
 row01 = rr[0]
 row02 = rr[1]
 print row01, row02
 html_str = ''
 #print "Content-Type: text/html\n\n"
 html_str += "  test  \n"
 html_str += "\n"
 html_str += " var row01 = %s\n"
 html_str += " var row02 = %s\n"
 html_str += "\n"
 html_str += " \n"
 html_str = html_str%(row01,row02)
 f = open('c:\\xbop_sinopec\\apache\\htdocs\\test01.html','w')
 f.write(html_str)
 f.close

do_search('中文')
#

The html code is as follows

  test 

 var row01 = (1, '\xd6\xd0\xce\xc4', '133499555')
 var row02 = (2, '\xd6\xd0\xce\xc4', '3434343434343')

 

But the '中文' is '\xd6\xd0\xce\xc4'. When row01 and row02 is called
from somewhere,
'\xd6\xd0\xce\xc4' can not be displayed correctly as '中文' in html
environment.

Thanks for your help and Merry Christmas to you too.

ouyang


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Re: object oriënted

[Jeremiah Dodds]

On Wed, Dec 24, 2008 at 10:54 AM, Dennis van Oosterhout <
de.slotenzwem...@gmail.com> wrote:

> I know that python is an Object Oriënted language but I was wondering if it
> gets used as a non-OOP also (by a good amount of people).
>
> --
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>
>
I, for one, use the different "paradigms" (OO, procedural, functional, etc)
where they feel appropriate for solving different problems.

I have quite a few strictly procedural scripts, mainly for sysadmin stuff
and generating project skeletons.

Most of the "complete" programs that I write use a mix of OO and functional
paradigms.
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Re: How to display Chinese in a list retrieved from database via python

[Jeroen Ruigrok van der Werven]

-On [20081225 08:30], zxo102 (zxo...@gmail.com) wrote:
> Anybody knows how to solve this problem?

You are assigning/pushing out Python byte sequences, not Unicode. Look at
u'' string variables, x.encode() and x.decode() to help you.
It's widely documented on the Internet, a quick Python Unicode (with encode
or decode) should get you there.

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イェルーン ラウフロック ヴァン デル ウェルヴェン
http://www.in-nomine.org/ | http://www.rangaku.org/ | GPG: 2EAC625B
Knowledge is soon changed, then lost in the mist, an echo half-heard...
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Is there a function to remove escape characters from a string ?

[Stef Mientki]

hello,

Is there a function to remove escape characters from a string ?
(preferable all escape characters except "\n").

thanks,
Stef
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os.system('cls')

[Dennis van Oosterhout]

Hi there! I was searching for a way to clear the 'DOS screen'/command screen
etc. and found that os.system('cls') works for this. I was just wondering
where I can find al the commands which can be used for os.system(). I
searched with google but I didn't find an answer. In the official python
tutorial it says os.system('command') executes the command, but it doesn't
say which commands exist (or I'm just blind).

Does anyone have an answer for this question?

Thanks,

Devilly
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Re: I always wonder ...

[Pierre-Alain Dorange]

r  wrote:

> 220 ratings and 1 star, WH!. I find this all quite amusing :D.
> Keep em coming. Oh, and FYI, I will always have 1 star! hahahahahha
> 
> 
>/"\
> |\./|
> |   |
>|   |
> |>~<|
> |   |
>  /'\|   |/'\
>  /~\|   |   |   |__
> |   |   }   |   |  \
> |   |   |   |   |   \
>| ~   ~   ~   ~ |`   )
> |   /
>   \  /
>   \   /
>\ /
> |--//''`\--|
> | (( +==)) |
> |--\_|_//--|

Very nice indeed, but you forget ascii art need a fixed font...

-- 
Pierre-Alain Dorange

Ce message est sous licence Creative Commons "by-nc-sa-2.0"

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Python with PyGIL_Ensure?

[googler . 1 . webmaster]

Hi!

I have a small problem with my python embedded interpreter. I do some
stuff where two threads exists which do some pythons stuff in the same
stuff.

So bpoth call PyGILState_Ensure() which occurs a crash. What can I do,
that one thread waits until the other thread released the gil state?

Thanks a lot.
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Re: Python with PyGIL_Ensure?

[googler . 1 . webmaster]

and merry christmas :)
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Re: Mathematica 7 compares to other languages

[Xah Lee]

> >On Dec 10, 2:47 pm, John W Kennedy  wrote:
> >> C:
>
> >> #include 
> >> #include 
>
> >> void normal(int dim, float* x, float* a) {
> >> float sum = 0.0f;
> >> int i;
> >> float divisor;
> >> for (i = 0; i < dim; ++i) sum += x[i] * x[i];
> >> divisor = sqrt(sum);
> >> for (i = 0; i < dim; ++i) a[i] = x[i]/divisor;
>
> >> }

Due to the low level of C, this C example should perhaps then accept a
sequence of numbers separated by space, and print the output. Having
dimension as part of input is not acceptable.

For examples in other langs that can take any input (in source code)
and print output, see:
http://xahlee.org/UnixResource_dir/writ/Mathematica_expressiveness.html

A new addition is in Scheme Lisp:

;; Scheme Lisp. By Bakul Shah
(define (normalize vec)
   (let ((d (sqrt (apply + (map (lambda (x) (* x x)) vec)
 (map (lambda (x) (/ x d)) vec)))

(normalize '(3 4))

The JavaScript example:

// Javascript. By William James
function normalize( vec ) {
var div=Math.sqrt(vec.map(function(x) x*x).reduce(function(a,b) a+b))
  return vec.map(function(x) x/div)
}

is also not qualified. (it is syntax error in SpiderMonkey engine
“JavaScript-C 1.7.0 2007-10-03”)

  Xah
∑ http://xahlee.org/

☄
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Re: os.system('cls')

[Dennis van Oosterhout]

Hello Arno,

thanks for the explanation! I have one more question: on the python
site it says it's better to replace the system commands by subprocess
and Popen.
Now I searched for some good example for my specific case (as I have
no idea how it should work and I don't get it any clearer by reading
http://docs.python.org/3.0/library/subprocess.html#module-subprocess)
and I found this:

> import subprocess
> def clear():
> subProcess.Popen('clear')

But it just doesn't seem to work. Would you have any idea how it would work?

Once more thanks for the first answer,

Devilly


2008/12/25 Python 
>
> On 25 dec 2008, at 11:22, Dennis van Oosterhout wrote:
>
>> Hi there! I was searching for a way to clear the 'DOS screen'/command screen 
>> etc. and found that os.system('cls') works for this. I was just wondering 
>> where I can find al the commands which can be used for os.system(). I 
>> searched with google but I didn't find an answer. In the official python 
>> tutorial it says os.system('command') executes the command, but it doesn't 
>> say which commands exist (or I'm just blind).
>>
>> Does anyone have an answer for this question?
>>
>> Thanks,
>>
>> Devilly
>
> Hey Deville,
>
>
> os.system() executes commands that you usually use in a shell outside python.
> so in the case of you being a windows user, you replace 'command' with any DOS
> command.
>
> gr
> Arno
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Re: Is there a function to remove escape characters from a string ?

[James Stroud]

Stef Mientki wrote:

hello,

Is there a function to remove escape characters from a string ?
(preferable all escape characters except "\n").

thanks,
Stef



import string

WANTED = string.printable[:-5] + "\n"

def descape(s, w=WANTED):
  return "".join(c for c in s if c in w)


James


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UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA  90095

http://www.jamesstroud.com
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Re: os.system('cls')

[Dennis van Oosterhout]

Btw...does that mean that system('cls') only works on Windows...or to
say it otherwise: the program isn't platform independant?

2008/12/25 Dennis van Oosterhout :
> Hello Arno,
>
> thanks for the explanation! I have one more question: on the python
> site it says it's better to replace the system commands by subprocess
> and Popen.
> Now I searched for some good example for my specific case (as I have
> no idea how it should work and I don't get it any clearer by reading
> http://docs.python.org/3.0/library/subprocess.html#module-subprocess)
> and I found this:
>
>> import subprocess
>> def clear():
>> subProcess.Popen('clear')
>
> But it just doesn't seem to work. Would you have any idea how it would work?
>
> Once more thanks for the first answer,
>
> Devilly
>
>
> 2008/12/25 Python 
>>
>> On 25 dec 2008, at 11:22, Dennis van Oosterhout wrote:
>>
>>> Hi there! I was searching for a way to clear the 'DOS screen'/command 
>>> screen etc. and found that os.system('cls') works for this. I was just 
>>> wondering where I can find al the commands which can be used for 
>>> os.system(). I searched with google but I didn't find an answer. In the 
>>> official python tutorial it says os.system('command') executes the command, 
>>> but it doesn't say which commands exist (or I'm just blind).
>>>
>>> Does anyone have an answer for this question?
>>>
>>> Thanks,
>>>
>>> Devilly
>>
>> Hey Deville,
>>
>>
>> os.system() executes commands that you usually use in a shell outside python.
>> so in the case of you being a windows user, you replace 'command' with any 
>> DOS
>> command.
>>
>> gr
>> Arno
>
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Re: os.system('cls')

[Python]

On 25 dec 2008, at 11:22, Dennis van Oosterhout wrote:

Hi there! I was searching for a way to clear the 'DOS screen'/ 
command screen etc. and found that os.system('cls') works for this.  
I was just wondering where I can find al the commands which can be  
used for os.system(). I searched with google but I didn't find an  
answer. In the official python tutorial it says os.system('command')  
executes the command, but it doesn't say which commands exist (or  
I'm just blind).


Does anyone have an answer for this question?

Thanks,

Devilly


Hey Deville,


os.system() executes commands that you usually use in a shell outside  
python.
so in the case of you being a windows user, you replace 'command' with  
any DOS

command.

gr
Arno
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Re: os.system('cls')

[Python]

On 25 dec 2008, at 12:56, Dennis van Oosterhout wrote:


Hello Arno,

thanks for the explanation! I have one more question: on the python
site it says it's better to replace the system commands by subprocess
and Popen.
Now I searched for some good example for my specific case (as I have
no idea how it should work and I don't get it any clearer by reading
http://docs.python.org/3.0/library/subprocess.html#module-subprocess)
and I found this:


import subprocess
def clear():
   subProcess.Popen('clear')



never used it myself either, but from reading the manual
i think you need

import subprocess
subprocess.Open('cls')


what you did is create a function that you need to call to execute it
(and a capital P typo in subprocess)

'clear' is for *nix systems
it won;t work in DOS i think
(I'm don;t have windows here...)


But it just doesn't seem to work. Would you have any idea how it  
would work?


Once more thanks for the first answer,




you;re welcome :)
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Re: os.system('cls')

[Jeremiah Dodds]

On Thu, Dec 25, 2008 at 7:11 AM, Dennis van Oosterhout <
de.slotenzwem...@gmail.com> wrote:

> Btw...does that mean that system('cls') only works on Windows...or to
> say it otherwise: the program isn't platform independant?
>
>
Yes.
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Re: os.system('cls')

[Python]

2008/12/25 Dennis van Oosterhout :

Hello Arno,

thanks for the explanation! I have one more question: on the python
site it says it's better to replace the system commands by subprocess
and Popen.
Now I searched for some good example for my specific case (as I have
no idea how it should work and I don't get it any clearer by reading
http://docs.python.org/3.0/library/subprocess.html#module-subprocess)
and I found this:


import subprocess
def clear():
   subProcess.Popen('clear')







On 25 dec 2008, at 13:11, Dennis van Oosterhout wrote:

Btw...does that mean that system('cls') only works on Windows...or to
say it otherwise: the program isn't platform independant?



what you are doing is executing a shell command.

look at it this way:

you open a DOS shell: start/run/command
there you enter the python interpreter by typing python (i think...)

now you can execute python commands

but if you want to execute DOS commands again,
you need to find a way to get "out" of python  and
back in to DOS

this is what happens...

so, "leaving" python brings you back into windows if you are on a  
windows system
thus you can't execute *nix commands and to answer your question,  
those commands

are system commands and so they are very system dependent ;)



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Re: Is there a function to remove escape characters from a string ?

[Jeremiah Dodds]

On Thu, Dec 25, 2008 at 7:02 AM, James Stroud  wrote:

> Stef Mientki wrote:
>
>> hello,
>>
>> Is there a function to remove escape characters from a string ?
>> (preferable all escape characters except "\n").
>>
>> thanks,
>> Stef
>>
>
>
>
import string

test = 'this\r is a test\t yeah\n'

for c in string.printable[-5:]:
 if c != '\n':
test = test.replace(c, ' ')


Hmm, should the escape codes be in their own little list in string? Or are
they, and I'm just not seeing them? Is string.printable[-5:] a reliable way
to get the list of escape codes?
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Re: SyntaxError: encoding problem: with BOM

[NoName]

On 25 дек, 03:35, "Diez B. Roggisch"  wrote:
> NoName schrieb:
>
>
>
> > On 25 ÄÅË, 00:37, "Diez B. Roggisch"  wrote:
> >> NoName schrieb:
>
> >>> i have 1.py in cp866 encoding:
> >>> # -*- coding: cp866 -*-
> >>> print ("ff")
> >>> It's not work in Python 3.0
> >>> Error:
> >>> File "", line 1
> >>> SyntaxError: encoding problem: with BOM
> >>> what's wrong?
> >> I can only guess, but just because you write the coding-header that
> >> doesn't mean that the editor you use does actually *use* that encoding.
> >> What I presume it does is to use utf-8, and write that stupid BOM
> >> microsoft uses for denoting utf-8-content as first byte. Try using a
> >> different editor, or alter it's settings to really use your desired
> >> encoding.
>
> >> Diez
>
> > I used Far Manager editor. and it *really* used cp866
> > I can print hex dump of source file.
> > I don't want to use UTF-8 for py-file!
>
> How about you show us the python file in question?
>
> diez

you can get it here http://slil.ru/26481345
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Re: Is there a function to remove escape characters from a string ?

[John Machin]

On Dec 25, 9:00 pm, Stef Mientki  wrote:
> hello,
>
> Is there a function to remove escape characters from a string ?
> (preferable all escape characters except "\n").

"\n" is not what most people would call an escape character. The "\"
is what most people would call an escape character when it is used in
a manner like in a Python non-raw string (e.g. "1\tStef\r\n2\tJames\r
\n").

Assuming (as James has done) that you meant you want to remove all but
"truly visible ASCII characters, plus newline", I'd have to ask: Are
you sure?? Do you really want to throw away tabs, when they might be
separating fields, as in the above example?

Let's start at the beginning:

Python 2.x or 3.x?
Type of your data objects is str/bytes or unicode/str or both?
If str/bytes, what encoding(s)?
What exactly are these "escape characters"?
Are you sure that you need to remove them all i.e. you don't want to
replace some with other characters?

HTH,
John
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RE: os.system('cls')

[Barak, Ron]

Hi Dennis,

print dir(os.system)
print os.__dict__
might help

Bye,
Ron.


From: Dennis van Oosterhout [mailto:de.slotenzwem...@gmail.com]
Sent: Thursday, December 25, 2008 12:22
To: python-list@python.org
Subject: os.system('cls')

Hi there! I was searching for a way to clear the 'DOS screen'/command screen 
etc. and found that os.system('cls') works for this. I was just wondering where 
I can find al the commands which can be used for os.system(). I searched with 
google but I didn't find an answer. In the official python tutorial it says 
os.system('command') executes the command, but it doesn't say which commands 
exist (or I'm just blind).

Does anyone have an answer for this question?

Thanks,

Devilly
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seek() returns unexpected results

[Barak, Ron]

 Hi,

When using seek() with a certain text file, I get strange results.
I looked at the text file with a binary editor and verified with 'file', and 
it's an ASCII English text file.

Running the script on other text files gives the expected output.

Could you suggest the reason ?

In the outputs below, when using generator.py as input for generator.py the 
'diff' is a nice progression as expected. ('diff' is the difference between the 
file pointer location and the number of characters read up to now).

However, when using sac.log as input for generator.py the 'diff' is a strange 
series: 1, 2, 1, 2, 3, 4, 5, 6

Running generator.py on a bigger portion of sac.log produces these 'diff's:
 1, 2, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 
21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 
12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 1, 
2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 
24, 25, 26, 27, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 
19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 
11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 
31, 32, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 
21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 
13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 1, 2, 3, 4, 5, 6, 7, 8, 
9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 1, 2, 3, 
4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 
25, 26, 27, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 
20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

Thanks,
Ron.



$ cat -n generator.py
 1  #!/usr/bin/env python
 2
 3  import gzip
 4  import sys
 5  from Debug import _line as line
 6
 7  class LogStream():
 8
 9  def __init__(self, filename):
10  self.filename = filename
11  self.input_file = self.open_file(filename)
12
13  def open_file(self, in_file):
14  try:
15  f = gzip.GzipFile(in_file, "r")
16  f.readline()
17  except IOError:
18  f = open(in_file, "r")
19  f.readline()
20  f.seek(0)
21  return(f)
22
23  def line_generator(self):
24  while True:
25  line_ = self.input_file.readline()
26  print line()+". line_==|"+line_.strip()+"|"
27  self.total_chars += len(line_)
28  print line()+". line length:",len(line_),"; file 
pointer:",self.input_file.tell(),
29  print "; total chars:",self.total_chars,"; 
diff:",self.input_file.tell() - self.total_chars
30  if not line_:
31  break
32  yield line_.strip()
33
34
35  if __name__ == "__main__":
36
37  filename = sys.argv[1]
38  log_stream = LogStream(filename)
39  log_stream.input_file.seek(0)
40  log_stream.total_chars = 0
41  line_generator = log_stream.line_generator()
42  for i in range(8):
43  line_ = line_generator.next()

$ python generator.py generator.py
26. line_==|#!/usr/bin/env python|
28. line length: 22 ; file pointer: 23 ; total chars: 22 ; diff: 1
26. line_==||
28. line length: 1 ; file pointer: 25 ; total chars: 23 ; diff: 2
26. line_==|import gzip|
28. line length: 12 ; file pointer: 38 ; total chars: 35 ; diff: 3
26. line_==|import sys|
28. line length: 11 ; file pointer: 50 ; total chars: 46 ; diff: 4
26. line_==|from Debug import _line as line|
28. line length: 32 ; file pointer: 83 ; total chars: 78 ; diff: 5
26. line_==||
28. line length: 1 ; file pointer: 85 ; total chars: 79 ; diff: 6
26. line_==|class LogStream():|
28. line length: 19 ; file pointer: 105 ; total chars: 98 ; diff: 7
26. line_==||
28. line length: 5 ; file pointer: 111 ; total chars: 103 ; diff: 8

$ python generator.py sac.log
26. line_==|Dec 15 15:45:20 iSW-00-090 svm_sac[1714]: AGENT[0]:  [tv_expand 
  ] tv_expand:[Domain 5:DVol1_3CG1-MM-1229347528T0] 
maxVolCapacityMB:[5121] tempVolCapacityMB:...[512] 
fivePercentMB:...[256] expandedTempVolCap:..[1024]|
28. line length: 246 ; file pointer: 247 ; total chars: 246 ; diff: 1
26. line_==|Dec 15 15:45:20 iSW-00-090 svm_sac[1714]: AGENT[0]:  
[daemon_send_expand_reque] [Domain 5:DVol1_3CG1-MM-1229347528T0]: Add expand 
request up to 1024 MB (2097152 sectors)|
28. line length: 170 ; file pointer: 418 ; total chars: 416 ; diff: 2
26. line_==|Dec 15 15:45:20 iSW-00-090 svm_sac[1746]: AGENT[0]:  
[domain_expand_exec  ] [Domain 5:DVol1_3CG1-MM-1229347528T0]: Send expand 
up to 1024 MB (2097152 sectors): success|
28. line 

Re: SyntaxError: encoding problem: with BOM

[John Machin]

On Dec 25, 11:36 pm, NoName  wrote:
> On 25 дек, 03:35, "Diez B. Roggisch"  wrote:
>
>
>
> > NoName schrieb:
>
> > > On 25 ÄÅË, 00:37, "Diez B. Roggisch"  wrote:
> > >> NoName schrieb:
>
> > >>> i have 1.py in cp866 encoding:
> > >>> # -*- coding: cp866 -*-
> > >>> print ("ff")
> > >>> It's not work in Python 3.0
> > >>> Error:
> > >>> File "", line 1
> > >>> SyntaxError: encoding problem: with BOM
> > >>> what's wrong?
> > >> I can only guess, but just because you write the coding-header that
> > >> doesn't mean that the editor you use does actually *use* that encoding.
> > >> What I presume it does is to use utf-8, and write that stupid BOM
> > >> microsoft uses for denoting utf-8-content as first byte. Try using a
> > >> different editor, or alter it's settings to really use your desired
> > >> encoding.
>
> > >> Diez
>
> > > I used Far Manager editor. and it *really* used cp866
> > > I can print hex dump of source file.
> > > I don't want to use UTF-8 for py-file!
>
> > How about you show us the python file in question?
>
> > diez
>
> you can get it here http://slil.ru/26481345

NoName, Asking people to download a zip file from a website written in
a language and character set that they probably are not familiar with
is liable to make them rather nervous and not bother. It's not a good
way to ask for help. All you had to do was display the file contents
unambiguously, like this:

C:\downloads>\python30\python
Python 3.0 (r30:67507, Dec  3 2008, 20:14:27) [MSC v.1500 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> open('11.py', 'rb').read()
b"# -*- coding: cp866 -*- \r\nprint('test')"
>>> ^Z

So, there's nothing very remarkable there ... a trailing space on the
end of the first line, the second line is not terminated by \r\n, no
non-ASCII characters in the file, ... nothing that might cause Python
to give you a syntax error.

... and it doesn't give a syntax error:

C:\downloads>\python30\python 11.py
test

If you still maintain that you are getting the syntax error mentioned
in your first posting, please construct a file that causes the error
to happen on your machine (what type of machine? what OS are you
using?) and show (like I did above) firstly what is in the file and
secondly what happens when you run it. No hex editors, no websites, no
zip files, just plain Python like I did.
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Re: PythonCard timer/thread tutorial

[Steven D'Aprano]

On Wed, 24 Dec 2008 16:59:23 -0800, Mike Driscoll wrote:


>> Among my questions are:
>> """ A little thread we've added""" seems to be an isolated string. It
>> does not seem to be doing anything there, almost like a comment. Why is
>> it there?
> 
> 
> That's what some people call a doc string. 

Other people call it "Maurice". *wink*

A doc[umentation] string is the accepted name for it. Anytime a function, 
class or module starts immediately with a loan string, that string is 
stored by the Python compiler in an attribute __doc__. E.g.:

>>> def parrot(x):
... "This is a doc string."
... return "Norwegian Blue"
...
>>> parrot.__doc__
'This is a doc string.'


> It is like a comment in that
> it helps the user know what the function is for. Notice the triple
> quotes. 

Triple quotes are a red herring. Any string literal will do.


-- 
Steven
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Re: PythonCard timer/thread tutorial

[Mike Driscoll]

On Dec 25, 7:24 am, Steven D'Aprano  wrote:
> On Wed, 24 Dec 2008 16:59:23 -0800, Mike Driscoll wrote:
> >> Among my questions are:
> >> """ A little thread we've added""" seems to be an isolated string. It
> >> does not seem to be doing anything there, almost like a comment. Why is
> >> it there?
>
> > That's what some people call a doc string.
>
> Other people call it "Maurice". *wink*
>
> A doc[umentation] string is the accepted name for it. Anytime a function,
> class or module starts immediately with a loan string, that string is
> stored by the Python compiler in an attribute __doc__. E.g.:
>
> >>> def parrot(x):
>
> ...     "This is a doc string."
> ...     return "Norwegian Blue"
> ...>>> parrot.__doc__
>
> 'This is a doc string.'
>
> > It is like a comment in that
> > it helps the user know what the function is for. Notice the triple
> > quotes.
>
> Triple quotes are a red herring. Any string literal will do.
>
> --
> Steven

Thanks for clearing that up. I suppose that's more of a recommended
style choice than a requirement. I'm pretty sure some of the Python
books I've read have implied that the triple quotes matter...oh well.
Live and learn. Merry Christmas!

Mike
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Canada lesbian couple

[kylefranki]

couple de lesbienne cherche sex occasionnelle femme seulement
http://canada-lesbi.blogbugs.org/
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DomainKey library for python

[Nicolas Delanos]

Hello,

Do you know if there is a domainkey library for python ?

thanks 
 
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Re: os.system('cls')

[D'Arcy J.M. Cain]

On Thu, 25 Dec 2008 13:11:09 +0100
"Dennis van Oosterhout"  wrote:
> Btw...does that mean that system('cls') only works on Windows...or to
> say it otherwise: the program isn't platform independant?

Exactly - sort of.  Unless, of course, you have a program called "cls"
installed on other platforms.  The "system" method is platform
independent in that it runs system commands on all platforms but it has
no control over what system commands happen to exist on your system.
Depending on the command you run it may not even be portable to another
Windows system of exactly the same version.

BTW, "os.system('clear') will clear the screen on many Unix systems.

-- 
D'Arcy J.M. Cain  |  Democracy is three wolves
http://www.druid.net/darcy/|  and a sheep voting on
+1 416 425 1212 (DoD#0082)(eNTP)   |  what's for dinner.
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Re: SyntaxError: encoding problem: with BOM

[NoName]

> NoName, Asking people to download a zip file from a website written in
> a language and character set that they probably are not familiar with
> is liable to make them rather nervous and not bother. It's not a good
> way to ask for help.

sorry:)

Now i know where problem.
But i dont know how to solve it.

Error

C:\Documents and Settings\Ra\Рабочий стол>11.py
  File "", line 1
SyntaxError: encoding problem: with BOM

No error

C:\Documents and Settings\Ra\Рабочий стол>python 11.py
test

Error when russian symbols in full path to py-script.
Is it Python bug? or i need to modify some registry keys?

OS: WinXP SP3 Russian.
Python 3.0 (r30:67507, Dec  3 2008, 20:14:27) [MSC v.1500 32 bit
(Intel)] on win32


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Re: Is there a function to remove escape characters from a string ?

[Steven D'Aprano]

On Thu, 25 Dec 2008 11:00:18 +0100, Stef Mientki wrote:

> hello,
> 
> Is there a function to remove escape characters from a string ?
> (preferable all escape characters except "\n").


Can you explain what you mean? I can think of at least four alternatives:

(1) Remove literal escape sequences (backslash-char):
"abc\\t\\ad" => "abcd"
r"abc\t\ad" => "abcd"


(2) Replace literal escape sequences with the character they represent:
"abc\\t\\ad" => "abc\t\ad"


(3) Remove characters generated by escape sequences:
"abc\t\ad" => "abcd"
"abc" => "abc" but "a\x62c" => "ac"

This is likely to be impossible without deep magic.


(4) Remove so-called binary characters which are typically inserted using 
escape sequences:
"abc\t\ad" => "abcd"
"abc" => "abc" but "a\x62c" => "abc"

This is probably the easiest, assuming you have bytes instead of unicode.

import string
table = string.maketrans('', '')
delchars =''.join(chr(n) for n in range(32))

s = string.translate(s, table, delchars)



-- 
Steven
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Getting a locked buffer from objects (PEP 3118)

[KKH]

Hi,

it seems the whole locking-theme has gone from PEP 3118 (PyBUF_LOCK is gone). 
Yet the string and byte objects seem to provide locked buffers through 
PyArg_Parse arguments s*, y* and z* (documentation says so).

Could someone please clarify the situation for me: Is it save to release the 
GIL after getting a reference to a buffer-object by the arguments above and 
only talking to this buffer while the GIL is gone?

And while we are at it :-) Is "PyArg_Parse('[syz]*'..." the only way to get a 
locked buffer-view from string/byte objects?

Regards
ebfe


  
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question; C/C++ with Python

[Hongtian]

Hi friends,

I have a C/C++ application and I wrote a .py file to extend it.
The .py file includes some simple functions without import any other
modules.

Today, I want to update my .py file and import SMTP library in the
file, but it seems fail to import SMTP library.

So I want to ask: when the .py file is used to extend C/C++
application, can it import other modules? How to do that? should I
copy all pythons libs to my C/C++ application directory? That could be
terrible...

Thanks.

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Topics on Electronics

[sriya]

Electronics is the field of manipulating electrical currents and
voltages using passive and active components that are connected
together to create circuits. Electronic circuits range from a simple
load resistor that converts a current to a voltage, to computer
central-processing units (CPUs) that can contain more than a million
transistors. The following indices and documents provide a basic
reference for understanding electronic components, circuits, and
applications.

http://electronicstopics.blogspot.com/2008/10/welcome-to-world-of-electronics.html
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Question withdrawn: seek() returns unexpected results

[Barak, Ron]

Hi,
Problem solved when strip() is being replaced by strip('\n').
Happy holidays,
Ron.


From: Barak, Ron
Sent: Thursday, December 25, 2008 15:05
To: 'python-list@python.org'
Subject: seek() returns unexpected results


 Hi,

When using seek() with a certain text file, I get strange results.
I looked at the text file with a binary editor and verified with 'file', and 
it's an ASCII English text file.

Running the script on other text files gives the expected output.

Could you suggest the reason ?

In the outputs below, when using generator.py as input for generator.py the 
'diff' is a nice progression as expected. ('diff' is the difference between the 
file pointer location and the number of characters read up to now).

However, when using sac.log as input for generator.py the 'diff' is a strange 
series: 1, 2, 1, 2, 3, 4, 5, 6

Running generator.py on a bigger portion of sac.log produces these 'diff's:
 1, 2, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 
21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 
12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 1, 
2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 
24, 25, 26, 27, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 
19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 
11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 
31, 32, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 
21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 
13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 1, 2, 3, 4, 5, 6, 7, 8, 
9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 1, 2, 3, 
4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 
25, 26, 27, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 
20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

Thanks,
Ron.



$ cat -n generator.py
 1  #!/usr/bin/env python
 2
 3  import gzip
 4  import sys
 5  from Debug import _line as line
 6
 7  class LogStream():
 8
 9  def __init__(self, filename):
10  self.filename = filename
11  self.input_file = self.open_file(filename)
12
13  def open_file(self, in_file):
14  try:
15  f = gzip.GzipFile(in_file, "r")
16  f.readline()
17  except IOError:
18  f = open(in_file, "r")
19  f.readline()
20  f.seek(0)
21  return(f)
22
23  def line_generator(self):
24  while True:
25  line_ = self.input_file.readline()
26  print line()+". line_==|"+line_.strip()+"|"
27  self.total_chars += len(line_)
28  print line()+". line length:",len(line_),"; file 
pointer:",self.input_file.tell(),
29  print "; total chars:",self.total_chars,"; 
diff:",self.input_file.tell() - self.total_chars
30  if not line_:
31  break
32  yield line_.strip()
33
34
35  if __name__ == "__main__":
36
37  filename = sys.argv[1]
38  log_stream = LogStream(filename)
39  log_stream.input_file.seek(0)
40  log_stream.total_chars = 0
41  line_generator = log_stream.line_generator()
42  for i in range(8):
43  line_ = line_generator.next()

$ python generator.py generator.py
26. line_==|#!/usr/bin/env python|
28. line length: 22 ; file pointer: 23 ; total chars: 22 ; diff: 1
26. line_==||
28. line length: 1 ; file pointer: 25 ; total chars: 23 ; diff: 2
26. line_==|import gzip|
28. line length: 12 ; file pointer: 38 ; total chars: 35 ; diff: 3
26. line_==|import sys|
28. line length: 11 ; file pointer: 50 ; total chars: 46 ; diff: 4
26. line_==|from Debug import _line as line|
28. line length: 32 ; file pointer: 83 ; total chars: 78 ; diff: 5
26. line_==||
28. line length: 1 ; file pointer: 85 ; total chars: 79 ; diff: 6
26. line_==|class LogStream():|
28. line length: 19 ; file pointer: 105 ; total chars: 98 ; diff: 7
26. line_==||
28. line length: 5 ; file pointer: 111 ; total chars: 103 ; diff: 8

$ python generator.py sac.log
26. line_==|Dec 15 15:45:20 iSW-00-090 svm_sac[1714]: AGENT[0]:  [tv_expand 
  ] tv_expand:[Domain 5:DVol1_3CG1-MM-1229347528T0] 
maxVolCapacityMB:[5121] tempVolCapacityMB:...[512] 
fivePercentMB:...[256] expandedTempVolCap:..[1024]|
28. line length: 246 ; file pointer: 247 ; total chars: 246 ; diff: 1
26. line_==|Dec 15 15:45:20 iSW-00-090 svm_sac[1714]: AGENT[0]:  
[daemon_send_expand_reque] [Domain 5:DVol1_3CG1-MM-1229347528T0]: Add expand 
request up to 1024 MB (2097152 sectors)|
28. line lengt

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Re: os.system('cls')

[Chris Gonnerman]

Depends on what operating system you are using.  The list of possible 
commands would be unbounded, if not truly infinite.



> From: Dennis van Oosterhout [mailto:de.slotenzwem...@gmail.com]
>
> Hi there! I was searching for a way to clear the 'DOS screen'/command
> screen etc. and found that os.system('cls') works for this. I was just
> wondering where I can find al the commands which can be used for
> os.system(). I searched with google but I didn't find an answer. In the
> official python tutorial it says os.system('command') executes the
> command, but it doesn't say which commands exist (or I'm just blind).
>
> Does anyone have an answer for this question?
>

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Exec inside a class method to call other class methods?

[Matthew Dubins]

Hello all,

I have made a python script to upload contact information from an excel 
worksheet to an online database.  One part of the program that really 
tripped me up was when I wanted to call specific class methods that I 
had made to deal with specific types of contact information (Parent's 
name, Child's name, Phone #, etc).  My first thought was to make it easy 
using the exec statement. 


The code (a method within a class) looked like this:
--
def parse(self, data, data_type)
   exec "self.__parse_%s(data)" % data_type
--
The data_type variable contains strings that exactly match the spellings 
of the 2nd word in the titles of the class methods that I wanted to call 
for each data_type inputted into the parse function.  For some reason, 
*it didn't work*.  Alternately, I found the ugly code shown below to be 
functional.  As you can see, for each data_type, I call the 
corresponding class method that I've specified.  Please help me to 
transform my ugly functional code into concise functional code. :)


Thanks,
Matthew
--
   def parse(self, data, data_type):
   if data_type == 'nocall':
   self.__parse_nocall(data)
   elif data_type == 'DOB':
   self.__parse_DOB(data)
   elif data_type == 'gender':
   self.__parse_gender(data)
   elif data_type == 'Prematurity':
   self.__parse_Prematurity(data)
   elif data_type == 'email':
   self.__parse_email(data)
   elif data_type == 'languages':
   self.__parse_languages(data)
   elif data_type == 'phone':
   self.__parse_phone(data)
   elif data_type == 'cname':
   self.__parse_cname(data)
   elif data_type == 'pname':
   self.__parse_pname(data)
   elif data_type == 'address':
   self.__parse_address(data)
   elif data_type == 'duedate':
   self.__parse_dudedate(data)

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Re: I always wonder ...

[r]

On Dec 25, 4:22 am, pdora...@pas-de-pub-merci.mac.com (Pierre-Alain
Dorange) wrote:
> r  wrote:
> > 220 ratings and 1 star, WH!. I find this all quite amusing :D.
> > Keep em coming. Oh, and FYI, I will always have 1 star! hahahahahha
>
> >                    /"\
> >                     |\./|
> >                     |   |
> >                    |   |
> >                     |>~<|
> >                     |   |
> >                  /'\|   |/'\
> >              /~\|   |   |   |__
> >             |   |   }   |   |  \
> >             |   |   |   |   |   \
> >            | ~   ~   ~   ~ |`   )
> >             |                   /
> >           \                  /
> >               \               /
> >                \         /
> >                 |--//''`\--|
> >                 | (( +==)) |
> >                 |--\_|_//--|
>
> Very nice indeed, but you forget ascii art need a fixed font...
>
> --
> Pierre-Alain Dorange
>
> Ce message est sous licence Creative Commons "by-nc-sa-2.0"
>         

Go to Google groups... it looks perfect :)
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Syntax error for print

[jsm4321]

IDLE 3.0
>>> print "hello"
SyntaxError: invalid syntax (, line 1)
>>> 3+3
6
>>> var = 4
>>> var = var*4
>>> print var
SyntaxError: invalid syntax (, line 1)
>>>



Any idea on why I am getting this error.
I have just started learning python and I am stuck at first thing
itself.
Any help would be greatly appreciated.


Thanks,
Jeetu Sahil


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Re: Exec inside a class method to call other class methods?

[bearophileHUGS]

Matthew Dubins:
> def parse(self, data, data_type)
>     exec "self.__parse_%s(data)" % data_type
> For some reason, *it didn't work*.

You can try defining this class attribute:
data_types = set("nocall DOB gender Prematurity email languages phone
cname pname address duedate".split())

And then a possible method can be:

def parse(self, data, data_type):
if data_type in Classname.data_types:
getattr(self, "__parse_" + data_type)(data)

If performance isn't a problem you can move data_types inside the
parse method.
If performance is a problem, data_types may become a dict, whose
values are references to the methods. That you can use as:

def parse(self, data, data_type):
if data_type in data_types:
data_types[data_type](data)

Or even as (but may be a little slower):

def parse(self, data, data_type):
data_types.get(data_type, lambda x: None)(data)

Bye,
bearophile
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Re: Syntax error for print

[bearophileHUGS]

On Dec 25, 7:53 pm, jsm4...@gmail.com wrote:
> IDLE 3.0>>> print "hello"
>
> SyntaxError: invalid syntax (, line 1)>>> 3+3
> 6
> >>> var = 4
> >>> var = var*4
> >>> print var
>
> SyntaxError: invalid syntax (, line 1)
>
>
>
> Any idea on why I am getting this error.
> I have just started learning python and I am stuck at first thing
> itself.
> Any help would be greatly appreciated.
>
> Thanks,
> Jeetu Sahil

The print of Python3 needs parentheses:

print(var)

Older Python versions are different.

Bye,
bearophile
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Re: Syntax error for print

[jsm4321]

Thanks Bearophile.

I should have used a tutorial for Python 3.0

I was reading tutorial for Python 2.5

On Dec 25, 11:58 pm, bearophileh...@lycos.com wrote:
> On Dec 25, 7:53 pm, jsm4...@gmail.com wrote:
>
>
>
> > IDLE 3.0>>> print "hello"
>
> > SyntaxError: invalid syntax (, line 1)>>> 3+3
> > 6
> > >>> var = 4
> > >>> var = var*4
> > >>> print var
>
> > SyntaxError: invalid syntax (, line 1)
>
> > Any idea on why I am getting this error.
> > I have just started learning python and I am stuck at first thing
> > itself.
> > Any help would be greatly appreciated.
>
> > Thanks,
> > Jeetu Sahil
>
> The print of Python3 needs parentheses:
>
> print(var)
>
> Older Python versions are different.
>
> Bye,
> bearophile

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Re: Syntax error for print

[Christian Heimes]

jsm4...@gmail.com schrieb:
> Thanks Bearophile.
> 
> I should have used a tutorial for Python 3.0
> 
> I was reading tutorial for Python 2.5

Get Python 2.5 or 2.6, seriously. Python 3.0 is not (yet) supported by
most tutorials, third party extensions and books.

Christian

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odfpy examples

[Ellinghaus, Lance]

Has anyone created any complex spreadsheets using odfpy?
The samples that come with odfpy are pretty simple and I need some
examples of more complex spreadsheets.

Thank you,
lance

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Re: How to display Chinese in a list retrieved from database via python

[Gabriel Genellina]

En Thu, 25 Dec 2008 07:27:03 -0200, zxo102  escribió:


On 12月25日, 下午3时35分, "Chris Rebert"  wrote:

On Wed, Dec 24, 2008 at 11:29 PM, zxo102  wrote:
> Hi,
>   I retrieve some info in Chinese from postgresql  and assign it to a
> variable 'info' defined in javascript of a html page:
>   var info = ['\xd6\xd0\xce\xc4','\xd6\xd0\xce\xc4','\xd6\xd0\xce
> \xc4']
>  But I want it to be
>   var info = ['中文','中文','中文']
>  since in html pages (via javascript), the items in chinese out of the
> former :['\xd6\xd0\xce\xc4','\xd6\xd0\xce\xc4','\xd6\xd0\xce\xc4'] can
> not be displayed correctly when it is inserted into a html page. If
> the list is  var info = ['中文','中文','中文'] , then everything works
> fine.



The html code is as follows

  test 

 var row01 = (1, '\xd6\xd0\xce\xc4', '133499555')
 var row02 = (2, '\xd6\xd0\xce\xc4', '3434343434343')

 

But the '中文' is '\xd6\xd0\xce\xc4'. When row01 and row02 is called
from somewhere,
'\xd6\xd0\xce\xc4' can not be displayed correctly as '中文' in html
environment.


You forgot to specify the page encoding, gb2312 presumably. If adding the  
encoding does not help, I'd say the problem must reside on how you later  
use row01 and row02 (your html page does not those variables for  
anything). '中文' is the same as '\xd6\xd0\xce\xc4', and both javascript  
and Python share the same representation for strings (mostly) so this  
should not be an issue.


My PC is unable to display those characters, but I get "true" from this:

 test 
language=javascript>alert('中文'=='\xd6\xd0\xce\xc4')


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