On Thu, Feb 7, 2013 at 5:50 PM, Steven D'Aprano
wrote:
> On Thu, 07 Feb 2013 16:28:17 +1100, Chris Angelico wrote:
>
>> You misunderstand. It's actually a very simple rule. Python follows C's
>> principle of accepting that any return value from an expression should
>> be ignored if you don't do an
I'm trying to listen to a bunch of sockets using epoll under Linux, e.g.
import select, socket
socket1 = socket.socket() ...
p = select.epoll()
p.register(socket1); p.register(socket2); ...
result = p.poll()
This returns `result' as a list of 2-tuples (fd, status) where fd
is a Li
On Thu, 07 Feb 2013 16:28:17 +1100, Chris Angelico wrote:
> On Thu, Feb 7, 2013 at 10:46 AM, Steven D'Aprano
> wrote:
>> Dennis Lee Bieber wrote:
>>> Though that is the nice feature of REXX*... Anything that wasn't
>>> parsable as a REXX statement was automatically sent to the current
>>> command
On Thu, Feb 7, 2013 at 9:02 AM, wrote:
> Basically I am creating a program that will stream musical notes into a
> program called Lilypond one-by-one and it will create the sheet music for
> that stream of music via OS command. Your understanding of Lilypond is not
> needed, but you need to kn
Steven D'Aprano wrote:
>
>Does anyone have an explanation why Decimal 0**0 behaves so differently from
>float 0**0?
>...
>I am familiar with the arguments for treating 0**0 as 0, or undefined, but
>thought that except for specialist use-cases, it was standard practice for
>programming languages to
On Thu, Feb 7, 2013 at 10:46 AM, Steven D'Aprano
wrote:
> Dennis Lee Bieber wrote:
>> Though that is the nice feature of REXX*... Anything that wasn't
>> parsable as a REXX statement was automatically sent to the current
>> command processor.
>
> Nice? Are you being sarcastic? What you're describi
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On Thu, 07 Feb 2013 10:06:32 +1100, Cameron Simpson wrote:
> | I cannot see how the firewall could possible distinguish between using
> | a temporary variable or not in these two snippets:
> |
> | # no temporary variable hangs, or fails
> | urllib2.urlopen("ftp://ftp2.census.gov/";).read()
> |
>
On Wed, 06 Feb 2013 10:37:07 -0500, Vladimir Ivkovic wrote:
> Hi Python experts,
>
> I am working with an array of data and am trying to plot several columns
> of data which are not continuous; i.e. I would like to plot columns 1:4
> and 6:8, without plotting column 5. The syntax I am currently u
On 02/06/2013 04:57 PM, Ethan Furman wrote:
On 02/06/2013 04:43 PM, c wrote:
But the function in the module is also within a *class* so I don't
think the function does have access to the module's global namespace.
Here's the hierarchy:
-- Module namespace
class namespace (Database
On 02/06/2013 04:43 PM, c wrote:
But the function in the module is also within a *class* so I don't
think the function does have access to the module's global namespace.
Here's the hierarchy:
-- Module namespace
class namespace (DatabaseAccess is the name of the class)
--
On 02/06/2013 05:45 PM, CM wrote:
> But the function in the module is also within a *class* so I don't
> think the function does have access to the module's global namespace.
> Here's the hierarchy:
>
> -- Module namespace
> class namespace (DatabaseAccess is the name of the class)
>
I was using self correctly, I think; but I should have said that the
code in the importing module would be within a class, so self there
refers to that class. But that's a side point.
I agree that utilities.shared_cursor is visible within the importing
module. But the problem below remains for m
On Feb 6, 7:03 pm, Michael Torrie wrote:
> On 02/06/2013 03:41 PM, CM wrote:
>
> > Thank you. But, I'm sorry, I'm not following this enough to get it to
> > work. Shouldn't it be a little more like this:
>
> No, not exactly.
>
>
>
> > # in utilities module
> > shared_cursor = DatabaseAccess_ins
On 02/06/2013 05:03 PM, Michael Torrie wrote:
> Every function in a module has access to the module's global namespace.
> And your shared_cursor is there, inside of the utilities reference,
> since utilities was imported into your module, "importer."
Just to be clear:
mod1.py:
a=5
-
On 02/06/2013 03:41 PM, CM wrote:
> Thank you. But, I'm sorry, I'm not following this enough to get it to
> work. Shouldn't it be a little more like this:
No, not exactly.
>
> # in utilities module
> shared_cursor = DatabaseAccess_instance #but how? see my question
> below...
How what?
> #
Let's keep this on the mailing list. Replying to back to the list.
On 02/06/2013 10:47 AM, tkhan10 wrote:
> Yes I have some shapefiles where some locations are geocoded. You can
> think it as a layer containing some points. I need to hide the actual
> point locations and create a new locations in
Dennis Lee Bieber wrote:
> On Wed, 6 Feb 2013 17:16:04 +1100, Chris Angelico
> declaimed the following in gmane.comp.python.general:
>
>>
>> It feels silly enough translating this OS/2 batch script:
>>
>> @logon SOME_USER /pSOME_PASS /vl
>> @e:\rexx\load
>> @db2 start database manager
>> @exit
Oops! Not that sort stability is used in this algorithm. Was thinking of
something else :-)
N
On Thursday, 7 February 2013 10:25:36 UTC+11, Nick Mellor wrote:
> Python 3 version:
>
>
>
> from collections import defaultdict
>
>
>
> data =
> ((0,'a','b'),(1,'c','d'),(2,'e','f'),(3,'g','h')
Hi Dennis,
Dennis Lee Bieber wrote:
> If this is meant to be a web-based system, you probably should be
> looking into using some sort of framework: Django, Zope/Plone, etc.
I tried both frameworks but I always see, that these frameworks
improve the progress to get things done but also lim
Python 3 version:
from collections import defaultdict
data =
((0,'a','b'),(1,'c','d'),(2,'e','f'),(3,'g','h'),(1,'i','j'),(2,'k','l'),(4,'m','n'),(2,'o','p'),(4,'q','r'),(5,'s','t'))
register = defaultdict(list)
for number, *letters in data:
register[number].extend(letters)
final = []
for i
On 2013-02-06 21:41, rh wrote:
I am curious to know if others would have done this differently. And if so
how so?
This converts a url to a more easily managed filename, stripping the
http protocol off.
This:
http://alongnameofasite1234567.com/q?sports=run&a=1&b=1
becomes this:
alongnameofasi
On 24Jan2013 04:12, Steven D'Aprano
wrote:
| On Thu, 24 Jan 2013 01:45:31 +0100, Hans Mulder wrote:
| > On 24/01/13 00:58:04, Chris Angelico wrote:
| >> Possibly it's some kind of race condition??
| >
| > If urllib2 is using active mode FTP, then a firewall on your box could
| > explain what you
On Feb 6, 12:04 am, Terry Reedy wrote:
> On 2/5/2013 11:40 PM, CM wrote:
>
>
>
>
>
>
>
>
>
> > I have recently moved all my SQLite3 database-related functions into a
> > class, DatabaseAccess, that lives in a "utilities" module. When the
> > application loads, the namespace of the instance of the
python -m cProfile [script_name].py
http://docs.python.org/2/library/profile.html#module-cProfile
Demian Brecht
http://demianbrecht.github.com
On 2013-02-06 2:30 PM, "richard_hubbe11"
wrote:
>I see that urlparse uses split and not re at all and, in my tests,
>urlparse
>completes in less ti
On 06Feb2013 09:59, Dave Angel wrote:
| The only place I now of where we care whether a particular thread in a
| process is "the main thread" is with a gui, which usually can only sit
| in a single, "main" thread. Any gui-related processing done in other
| threads must be done very carefully.
Hello,
I have been using Python for a few months now, so I am still learning a few
things here and there.
Basically I am creating a program that will stream musical notes into a program
called Lilypond one-by-one and it will create the sheet music for that stream
of music via OS command. Your
On 2013-02-05, Dennis Lee Bieber wrote:
> I'll echo the "Ugh" about the use of global AND ADD a dislike of the
> busy loop that only exits if some other return sets a value. If the busy
> loop were performing some action that changed the test state within the
> loop itself, okay...
TBH, I w
On 2013-02-05, Dave Angel wrote:
> I'm no fan of Java. But it's not about a "main" method, it's about
> sharing data between functions. Most of the time non-constant globals
> are a mistake. If the data can't be passed as an argument, then it
> should probably be part of the instance data of
Well, an alternative /could/ be:
from urlparse import urlparse
parts = urlparse('http://alongnameofasite1234567.com/q?sports=run&a=1&b=1')
print '%s%s_%s' % (parts.netloc.replace('.', '_'),
parts.path.replace('/', '_'),
parts.query.replace('&', '_').replace('=', '_')
)
Although wit
In article ,
rh wrote:
> I am curious to know if others would have done this differently. And if so
> how so?
>
> This converts a url to a more easily managed filename, stripping the
> http protocol off.
I would have used the urlparse module.
http://docs.python.org/2/library/urlparse.html
--
On Wed, 06 Feb 2013 10:03:08 -0800, rusi wrote:
> On Feb 6, 5:58 pm, Andriy Kornatskyy wrote:
>> The question of persistence implementation arise often. I found
>> repository pattern very valuable due to separation of concerns, mediate
>> between domain model and data source (mock, file, database
I agree that ORMs can be rather complicated; especially when you need
to do some refactoring.
Another reason not to use ORMs is difficult of measuring query complexity.
However, some of the most major advantages of ORMs are:
- Generation of forms
- Same code can be used with multiple backends
- T
On Feb 6, 5:58 pm, Andriy Kornatskyy
wrote:
> The question of persistence implementation arise often. I found repository
> pattern very valuable due to separation of concerns, mediate between domain
> model and data source (mock, file, database, web service, etc).
>
> The database data source is
On 02/06/2013 09:37 AM, tkhan10 wrote:
> Hello Everyone
>
> I am new to python and trying to understand this programming
> language. But right now I need to find a script on geographic masking
> methods. This is an emergency. These masking methods are to hide a
> specific location so that the iden
Julien Le Goff writes:
> Today I came accross a behaviour I did not expect in python (I am
> using 2.7). In my program, random.random() always seemed to return the
> same number; it turned out to be related to the fact that I was using
> os.fork.
The random number generator is initialized once,
Julien Le Goff wrote:
> Hi everyone,
>
> Today I came accross a behaviour I did not expect in python (I am using
> 2.7). In my program, random.random() always seemed to return the same
> number; it turned out to be related to the fact that I was using os.fork.
>
> See below a small program that
Hello Everyone
I am new to python and trying to understand this programming language. But
right now I need to find a script on geographic masking methods. This is an
emergency. These masking methods are to hide a specific location so that the
identification of that location is not revealed. I a
Hi everyone,
Today I came accross a behaviour I did not expect in python (I am using 2.7).
In my program, random.random() always seemed to return the same number; it
turned out to be related to the fact that I was using os.fork.
See below a small program that illustrates this. It is easily fixe
On Feb 6, 4:52 am, Banh wrote:
> Hi,
> I have a problem with learning Python. My code is really bad and I can't
> solve many problems. I
> really want to improve it. Do you know any website which helps me to learn
> python effectively (for
> beginners)? This is my first programming language and
On Saturday, February 2, 2013 12:01:40 PM UTC+2, Armin Karner wrote:
> Dear Sir or Madam,
>
>
>
>
>
>
>
> I am curious if there is an update of MySQLdb for python versions 3.3 or
> higher. Because I really need this for a diploma thesis.
> I've tried several of them, including various 2.x
Hi Python experts,
I am working with an array of data and am trying to plot several columns of
data which are not continuous; i.e. I would like to plot columns 1:4 and
6:8, without plotting column 5. The syntax I am currently using is:
oplot (t,d[:,0:4])
The question is: How do I specif
On 2013-02-06, Steven D'Aprano wrote:
> Chris Angelico wrote:
>
>> Python is not an "excellent option". It's a bad fit for shell
>> scripting, it just happens to be way better than a weak shell. Having
>> grown up on command.com, I found OS/2's cmd.exe to be a massive
>> improvement, and Windows's
The distutils.core.setup() function accepts a bunch of attributes, among them a
download_url parameter. I don't see a way to specify a VCS repository. Is that
possible?
Thx,
Skip
--
http://mail.python.org/mailman/listinfo/python-list
On 2013-02-06, Neil Cerutti wrote:
> On 2013-02-05, Grant Edwards wrote:
>> On 2013-02-05, Neil Cerutti wrote:
>>> On 2013-02-05, Walter Hurry wrote:
> Sorry, I'm a Linux guy. I have no clue what that means.
Hooray for common sense! Python is great, but it's silly to use
Pyt
On Saturday, January 12, 2013 2:45:38 AM UTC-5, Alec Taylor wrote:
> There have been various threads for MSVC 2010[1][2], but the most
>
> recent thing I found for MSVC 2012 was [3]… from 6 months ago.
>
>
>
> Basically I want to be able to compile bcrypt—and yes I should be
>
> using Keccak—x
On 2013-02-06, Ian Kelly wrote:
> On Tue, Feb 5, 2013 at 3:59 PM, Grant Edwards wrote:
>> On 2013-02-05, Neil Cerutti wrote:
>>> On 2013-02-05, Walter Hurry wrote:
> Sorry, I'm a Linux guy. I have no clue what that means.
Hooray for common sense! Python is great, but it's silly t
On 02/06/2013 06:52 AM, Steven D'Aprano wrote:
iMath wrote:
When a program starts up, one thread begins running immediately. This is
usually called the main thread of the program ,so each process only has
one main thread ,right ?
I'm not sure if we should say "each process HAS one main thread
- Original Message -
> Hi,
> I have a problem with learning Python. My code is really bad and I
> can't solve many problems. I really want to improve it. Do you know
> any website which helps me to learn python effectively (for
> beginners)? This is my first programming language and I am s
On 02/06/2013 05:19 AM, Ulrich Eckhardt wrote:
Dave and Terry,
Thanks you both for your explanations! I really appreciate the time you
took.
Am 05.02.2013 19:07, schrieb Dave Angel:
The main place where I see this type of problem is in a gui, where
you're defining a callback to be used by
On 7 February 2013 00:12, Sam Berry wrote:
> Hi,
>
> This is for a university project.
>
> My issue is that i have built an App using pythons Kivy module, and i need
> to be able to stream and record from an IP camera upon request.
>
> I have just used the VLC.exe to stream the video feed. But it
Banh writes:
> Hi,
> I have a problem with learning Python. My code is really bad and I can't
> solve many problems. I really want to improve it. Do you know any website
> which helps me to learn python effectively (for beginners)? This is my first
> programming language and I am studying abou
On 2013-02-05, Grant Edwards wrote:
> On 2013-02-05, Neil Cerutti wrote:
>> On 2013-02-05, Walter Hurry wrote:
Sorry, I'm a Linux guy. I have no clue what that means.
>>>
>>> Hooray for common sense! Python is great, but it's silly to use
>>> Python (unless there is good reason) when a sim
Dennis Lee Bieber writes:
> PowerShell is meant to be used for administrative level scripting,
> replacing such things as WSH.
Yeah and WSH has been included since Windows 98... So Windows has been
at least OK with shell scripting VBScript and JScript for the last 15
years or so. And I can
Hi,
This is for a university project.
My issue is that i have built an App using pythons Kivy module, and i need to
be able to stream and record from an IP camera upon request.
I have just used the VLC.exe to stream the video feed. But it is the recording
i am having problems with.
I'l look
The question of persistence implementation arise often. I found repository
pattern very valuable due to separation of concerns, mediate between domain
model and data source (mock, file, database, web service, etc).
The database data source is somewhat specific since you can proceed with SQL
fu
Thank you for the quick reply!
I found this code just from multiple google searches, but yer it mentioned
online video streaming, however my IP camera would be streaming in Mjpeg format
(I thought been able to convert between the two formats seemed way to easy!)
So i'm guessing its just 20mb of
On 6 February 2013 23:12, Sam Berry wrote:
> I have no vast knowledge of python, but i came across this code to capture
> video from my IP camera
>
> This code works, however when i try to playback the .avi file in VLC
> player...
I've been working with several IP cameras with Python and OpenCV
Sam Berry wrote:
> Hey,
>
> I have no vast knowledge of python, but i came across this code to capture
> video from my IP camera
>
> import urllib2
> import time
> import logging
>
> print "Recording video..."
> response = urllib2.urlopen("IP Address")
> filename = time.strftime("%Y%m%d%H%M%S",
Hey,
I have no vast knowledge of python, but i came across this code to capture
video from my IP camera
import urllib2
import time
import logging
print "Recording video..."
response = urllib2.urlopen("IP Address")
filename = time.strftime("%Y%m%d%H%M%S",time.localtime())+".avi"
f = open(filenam
iMath wrote:
> When a program starts up, one thread begins running immediately. This is
> usually called the main thread of the program ,so each process only has
> one main thread ,right ?
I'm not sure if we should say "each process HAS one main thread" or "each
process IS one main thread", or wh
When a program starts up, one thread begins running immediately. This is
usually called the main thread of the program ,so each process only has one
main thread ,right ?
--
http://mail.python.org/mailman/listinfo/python-list
Dave and Terry,
Thanks you both for your explanations! I really appreciate the time you
took.
Am 05.02.2013 19:07, schrieb Dave Angel:
If you need to have separate function objects that already know a
value for i, you need to somehow bind the value into the function object.
One way to do it,
You can just flatten the list using itertools and collate the results using
defaultdict:
import itertools
from collections import defaultdict
sequence =
((0,'a','b'),(1,'c','d'),(2,'e','f'),(3,'g','h'),(1,'i','j'),(2,'k','l'),(4,'m','n'),(2,'o','p'),(4,'q','r'),(5,'s','t'))
# flatten the list
- Original Message -
>
> [...]
> > By the way, did someone ever notice that r'\' fails ? I'm sure
> > there's a
> > reason for that... (python 2.5) Anyone knows ?
> >
> > r'\'
> > SyntaxError: EOL while scanning single-quoted string
> >
> >
> "Even in a raw string, string quotes can be e
Dennis Lee Bieber wrote:
> Which does, to me, imply an unnormalized database. The
> "team/category" should be a separate field.
> club(*ID*, name)
>
> team(*ID*, /club/, category)
>
> {where *..* is primary key, /../ is a foreign key}
You are right, but as I mentioned above I had to use so
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