[issue45723] Improve and simplify configure.ac checks
Change by Ant Man : -- nosy: +alwaysasetup ___ Python tracker <https://bugs.python.org/issue45723> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45723] Improve and simplify configure.ac checks
Change by Ant Man : -- components: +2to3 (2.x to 3.x conversion tool), Argument Clinic, C API, Cross-Build, Demos and Tools, Distutils, Documentation, Extension Modules, FreeBSD, IDLE, IO, Installation, Interpreter Core, Library (Lib), Parser, Regular Expressions, SSL, Subinterpreters, Tests, Tkinter, Unicode, Windows, XML, asyncio, ctypes, email, macOS nosy: +Alex.Willmer, asvetlov, barry, dstufft, eric.araujo, ezio.melotti, koobs, larry, lys.nikolaou, mrabarnett, ned.deily, pablogsal, paul.moore, r.david.murray, ronaldoussoren, steve.dower, terry.reedy, tim.golden, vstinner, yselivanov, zach.ware ___ Python tracker <https://bugs.python.org/issue45723> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45723] Improve and simplify configure.ac checks
Change by Ant Man : -- type: enhancement -> security ___ Python tracker <https://bugs.python.org/issue45723> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue46314] Stray RESUME opcode for unused lambda
Change by Ant Man : -- components: +2to3 (2.x to 3.x conversion tool), Argument Clinic, Build, C API, Cross-Build, Demos and Tools, Distutils, Documentation, Extension Modules, FreeBSD, IDLE, IO, Installation, Library (Lib), Parser, Regular Expressions, SSL, Subinterpreters, Tests, Tkinter, Unicode, Windows, XML, asyncio, ctypes, email, macOS nosy: +Alex.Willmer, asvetlov, barry, dstufft, eric.araujo, ezio.melotti, koobs, larry, lys.nikolaou, mrabarnett, ned.deily, paul.moore, r.david.murray, ronaldoussoren, steve.dower, terry.reedy, tim.golden, vstinner, yselivanov, zach.ware type: behavior -> security ___ Python tracker <https://bugs.python.org/issue46314> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
next steps to make a python program more available
ok, i have the program going and installable for my local Linux distribution. aka i have it packaged and on PyPI and it runs from my local terminal command line. i have people available for testing it out on Windows and a Mac, but i don't have any way of knowing what to do to make the program appear in their Menu system to make it clickable. in MATE (which is what i run here) i can figure it out as something to do with the desktop, so somehow i have to do that, but i don't know what keywords to even search for to do that, desktop icons i guess and menu, but is there a more global way to set that up? XDG seems to be a part of that. i'm figuring if i get it working for MATE that it should also work for Gnome. i haven't touched KDE in quite a few years. Windows i'll figure out after the more Linux/Posix systems. so my priorties are about like: 1. posix/other linux sytems (perhaps Macs fit into this anways) 2. Macs 3. Windows luckily i do have other examples of python 3 programs which seem to be multiple platform oriented that i can look at and see what they've done. so i won't be forever lost in the wilderness... thanks for help, :) ant -- https://mail.python.org/mailman/listinfo/python-list
Re: Why am I getting Error 405 while uploading my package to https://test.pypi.org/legacy?
sntshkm...@gmail.com wrote: >> $ pip install readme_renderer[md] > > Thanks a lot for this, I wasn't able to figure it out earlier. does it work ok now? got the upload to go to pypitest? ant -- https://mail.python.org/mailman/listinfo/python-list
Re: Why am I getting Error 405 while uploading my package to https://test.pypi.org/legacy?
sntshkm...@gmail.com wrote: >> did you check your dists via twine? >> >> $ twine check --verbose dist/* > > I checked with `twine check dist/*` (there's no --verbose option though). > I only get warning about markdown right, i see later in my history i used the twine check without the verbose option. you have to fix that for it to upload... $ pip install readme_renderer[md] >> also make sure you are using up to date versions of >> setuptools, wheel and twine >> >> >> $ pip install --upgrade setuptools >> $ pip install --upgrade wheel >> $ pip install --upgrade twine > > [65]> import setuptools, wheel, twine > [66]> print(setuptools.__version__) > 40.6.3 > [67]> print(wheel.__version__) > 0.32.3 > [68]> print(twine.__version__) > 1.12.1 > > >> i just used it earlier today... worked fine for me. >> is your account there and verified? > > Yes, I have an account on TestPyPI and is verified. try the above... ant -- https://mail.python.org/mailman/listinfo/python-list
Re: Why am I getting Error 405 while uploading my package to https://test.pypi.org/legacy?
sntshkm...@gmail.com wrote: >> .pypirc >>= >> [distutils] >> index-servers= >> testpypi >> >> [testpypi] >> repository: https://test.pypi.org/legacy/ >> username: UserName >> password: Password > > >> twine upload --repository testpypi dist/* > > Tried your suggestion for .pypirc file. Still the same error. > > Has something changed and is not reflected in the documentation? did you check your dists via twine? $ twine check --verbose dist/* also make sure you are using up to date versions of setuptools, wheel and twine $ pip install --upgrade setuptools $ pip install --upgrade wheel $ pip install --upgrade twine i just used it earlier today... worked fine for me. is your account there and verified? ant -- https://mail.python.org/mailman/listinfo/python-list
Re: Why am I getting Error 405 while uploading my package to https://test.pypi.org/legacy?
ant wrote: ... > .pypirc >= > [distutils] > index-servers= > testpypi > > [testpypi] > repository: https://test.pypi.org/legacy/ > username: UserName > password: Password >= > > > and my upload command is: > > >= > #!/bin/sh > # > # upload ngfp to test pypi > > NGFP_SRC_HOME="/home/me/src/salsa/ngfp" > if test ! -d "$NGFP_SRC_HOME" ; then > echo " directory $NGFP_SRC_HOME does not exist!" > exit > fi > > cd $NGFP_SRC_HOME > > twine upload --repository testpypi dist/* >= since i just went through this myself i thought i'd add a bit more. when you change over to post to the main pypi.org you need to do it to upload.pypi.org like: = [pypi] repository: https://upload.pypi.org/legacy/ = as i was getting 405 errors when using just pypi.org i suspect your error above is that you're not using the /legacy/ part at the end... good luck! ant -- https://mail.python.org/mailman/listinfo/python-list
Re: Why am I getting Error 405 while uploading my package to https://test.pypi.org/legacy?
sntshkm...@gmail.com wrote: > I'm trying to upload my package to PyPi, but before that I wanted to upload > my package to TestPyPi. > > I'm following https://packaging.python.org/guides/using-testpypi/ > > I'm issuing this command: `twine upload --repository-url > https://test.pypi.org/legacy/ dist/*` > > Here is the output: > > ``` > Enter your username: sntshkmr60 > Enter your password: > Uploading distributions to https://test.pypi.org/ > Uploading mysecretpackage-0.0.1a0-py3-none-any.whl > 100%|| > 16.7k/16.7k [00:06<00:00, 2.50kB/s] > NOTE: Try --verbose to see response content. > HTTPError: 405 Client Error: Method Not Allowed for url: > https://test.pypi.org/ > ``` > > Here is the extra output from --verbose flag: > > ``` > Content received from server: > > > 405 Method Not Allowed > > > 405 Method Not Allowed > The method POST is not allowed for this resource. > > > > HTTPError: 405 Client Error: Method Not Allowed for url: > https://test.pypi.org/ > ``` > > What am I doing wrong? well, i used it earlier so here is how i have it set up as follows. because this is testing repository i am not worried about password being stored in a file: .pypirc = [distutils] index-servers= testpypi [testpypi] repository: https://test.pypi.org/legacy/ username: UserName password: Password = and my upload command is: = #!/bin/sh # # upload ngfp to test pypi NGFP_SRC_HOME="/home/me/src/salsa/ngfp" if test ! -d "$NGFP_SRC_HOME" ; then echo " directory $NGFP_SRC_HOME does not exist!" exit fi cd $NGFP_SRC_HOME twine upload --repository testpypi dist/* = note: it may take a while for what you uploaded to be made available for download again even if it reflected in your project page. sometimes it has been as long as a half hour or more before it comes down. other times it has only been a few minutes. hope this helps... ant -- https://mail.python.org/mailman/listinfo/python-list
[SOLVED] Re: ah, progress...
dieter wrote: ... thank you for your help. :) i finally worked through the changes needed at last. my current package in testing PyPI is at: https://test.pypi.org/project/ngfp/ which uses my code from: https://salsa.debian.org/ant-guest/gfpoken-in-python i ended up needing to do two things. to get all the import statements changed to include the package/module name and to change all my image load statements to include the full path as determined at runtime. this may not work on a non-linux or non-posix system from the binary distribution but the source code distribution may work ok. if anyone wants to try it out. feedback is appreciated in any case. :) now the next fun steps (figuring out the windows, other versions and then the Debian packaging for it). since i don't have windows or other machines to test on i don't know how that will go. cheers and thanks again, ant -- https://mail.python.org/mailman/listinfo/python-list
Re: ah, progress...
dieter wrote: > ant writes: >> ... >> in order to get this far below i had to edit each >> file and put a try: except: around each import >> statment checking if the module could be found >> like (as an example): >> >> try: >> import config as cfg >> except: >> import frog.config as cfg > > Is "frog" the package, you want to install? > Then always use "import frog.config ...". frog is my temporary adaptation of my project to test out how to do this without actually making all those changes until i'm sure it is doing what i want. frog is a package as i understand it. here is the structure: = (env) me@ant(15)~/src/salsa/frog$ find . -print | grep -v ".git" | grep -v "__pycache__" | grep -v "dist" | grep -v "build" | sort . ./frog ./frog/active.py ./frog/background.py ./frog/board.py ./frog/commands.py ./frog/config.py ./frog/dialog.py ./frog/doc ./frog/doc/ngfp.6 ./frog.egg-info ./frog.egg-info/dependency_links.txt ./frog.egg-info/entry_points.txt ./frog.egg-info/PKG-INFO ./frog.egg-info/requires.txt ./frog.egg-info/SOURCES.txt ./frog.egg-info/top_level.txt ./frog/history.py ./frog/__init__.py ./frog/labels.py ./frog/__main__.py ./frog/marbles.py ./frog/my_init.py ./frog/ngfp.py ./frog/png ./frog/png/arrows ./frog/png/arrows/picDDownW.png ./frog/png/arrows/picDLeftW.png ...80 lines skipped... ./frog/png/misc/sink_inv.png ./frog/png/misc/sink_orig.png ./frog/randboard.py ./LICENSE ./LICENSE.GPL ./MANIFEST.in ./NOTICE ./README.md ./setup.cfg ./setup.py = > Python locates (top level) packages/modules via the so > called "Python path" (--> "sys.path"). When > you run a script, the "Python path" is extended by the > directory the script resides in -- thus a script typically > can import "local" packages/module (residing in its directory). > However, it is good practise to always access installed > packages via their "official package path" (which > in your case likely means "frog.config"). this is the first i'm hearing of a path being extended. why isn't that reflected when i print the current working directory when the program is running (in both cases the paths show identical)? this is also the first time i'm hearing of "official package path". there are likely the details i'm beating my head against... thank you. :) > When you develop a package, it may not yet be installed. > This might hinder you to import in the "official" way. correct. when i am testing/writing code i am in the source code directory above called frog which looks like: = -rw--- 1 me me 8962 Dec 21 00:20 active.py -rw--- 1 me me 6673 Dec 21 00:11 background.py -rw--- 1 me me 11796 Dec 21 00:10 board.py -rw--- 1 me me 217 Dec 20 23:16 commands.py -rw--- 1 me me 5987 Dec 21 00:12 config.py -rw--- 1 me me 34077 Dec 21 00:14 dialog.py drwx-- 2 me me 4096 Dec 18 09:26 doc -rw--- 1 me me 1943 Dec 21 00:15 history.py -rw--- 1 me me 310 Dec 20 23:39 __init__.py -rw--- 1 me me 1845 Dec 21 00:15 labels.py -rw--- 1 me me 140 Dec 20 22:39 __main__.py -rw------- 1 me me 23973 Dec 21 00:17 marbles.py -rw--- 1 me me 13534 Dec 21 00:34 my_init.py -rw--- 1 me me 10354 Dec 21 09:02 ngfp.py drwx-- 10 me me 4096 Dec 18 09:26 png -rw--- 1 me me 5514 Dec 21 00:18 randboard.py (env) me@ant(18)~/src/salsa/frog/frog$ = so to test the code i simply run it via $ python3 ngfp.py which works as i expect it. = > I work around this by using "setuptools" and its "setup" > function in my "setup.py". "setuptools" supports the > command "develop" (activated via "python setup.py develop") > which "installs" the package in a way that it refers to > the developped sources. This way, I can always > import in the "official" way and nevertheless all > my changes are effective immediately. i'm not sure how this works, but i will look into it. > Another approach would be to lay out your package in such > a way that it refects the installed structure and > for testing put your script in the directory containing > your top level packages (or extend "sys.path" with this directory). i think that is what i've always assumed that was how the code is installed is exactly as how i have it in my development directory as shown above. your hint here says that it probably isn't so... heh... thanks, these are things a newbie doesn't know, but someone experienced just considers common sense. for me coming from C code, packed and unpacked via tarballs and such exactly where i want them to go is the normal and it seems so strange to find things so hard to
Re: Mask two images with python
Umar Yusuf wrote:
...
> Hello Oscar,
> Thank you for your time.. Here is attached is an example set of the images:
> https://drive.google.com/file/d/1hyiWswx4GCZQDepXZjktq2zgM_LBbxXt/view?usp=sharing
> basically, it is "design + mask and glow = result"
that didn't work for me at all...
are the images .png or some other format that
allows transparency?
is it critical that it be done via Python or do you
just want it done at all? :)
gimp and other tools (Graphics Magic) will allow
this to be done interactively or via the command
line.
if it has to be done in python i'm only familiar
with pyglet and could do it easily enough that way
(sorry i'm a newbie about other ways in python :) ).
make a sprite in a certain location in a window with
the background image and then make another sprite with
the next layer on top of that one, one at a time, each
with it's own batch id.
then when it appears how you like it you can grab a
screen shot via:
The following example shows how to grab a screenshot of your application window:
pyglet.image.get_buffer_manager().get_color_buffer().save('screenshot.png')
Note that images can only be saved in the PNG format unless the Pillow library
is installed.
=
if you want an example of multiple layers i have
my work in progress that does exactly this sort of
thing (except i never save an image yet - that could
be easily added as above). you're welcome to take
the code and use it however you like:
https://salsa.debian.org/ant-guest/gfpoken-in-python
ant
--
https://mail.python.org/mailman/listinfo/python-list
Re: ah, progress...
dieter wrote:
> ant writes:
>> ant wrote:
>> ...
>>> (env) me@ant(26)~/src/test$ ngfp
>>> Traceback (most recent call last):
>>> File "/home/me/src/env/bin/ngfp", line 7, in
>>> from ngfp import main
>>> ImportError: cannot import name 'main' from 'ngfp'
>>> (/home/me/src/salsa/env/lib/python3.7/site-packages/ngfp/__init__.py)
>> ...
>> hmmm, but my main is defined in ngfp.py
>
> The error message tells you that it looks for "main"
> in "...ngfp/__init__.py", not in "ngfp.py".
i took an examply python program called afew and
edited it down to work for a very simple program
which i then took my other code and put it in that
directory structure to make sure i wasn't doing
anything strange, but i still ended up where
running the program one way works and running it
the other way it seems to miss something important
which i don't understand.
in order to get this far below i had to edit each
file and put a try: except: around each import
statment checking if the module could be found
like (as an example):
try:
import config as cfg
except:
import frog.config as cfg
this is very frustrating because the following makes
no sense to me:
when i run the code within the directory like this i get:
= this works as it should
(env) me@ant(30)~/src/salsa/frog/frog$ python3 ngfp.py
current_dir : /home/me/src/salsa/frog/frog
(env) me@ant(31)~/src/salsa/frog/frog$
=
when i pack it up and then install it using (and then run it via
the script):
= it doesn't work, but the directory is the same...?
(env) me@ant(150)~/src/salsa/test$ pip3 --no-cache-dir install -e ../frog/
--force-reinstall
Obtaining file:///home/me/src/salsa/frog
Requirement already satisfied: pyglet>=1.3.0 in
/home/me/src/salsa/env/lib/python3.7/site-packages (from frog==1.0.0)
Requirement already satisfied: future in
/home/me/src/salsa/env/lib/python3.7/site-packages (from
pyglet>=1.3.0->frog==1.0.0)
Installing collected packages: frog
Found existing installation: frog 1.0.0
Uninstalling frog-1.0.0:
Successfully uninstalled frog-1.0.0
Running setup.py develop for frog
Successfully installed frog
(env) me@ant(151)~/src/salsa/test$ frog
current_dir : /home/me/src/salsa/frog/frog
Traceback (most recent call last):
File "/home/me/src/salsa/env/bin/frog", line 11, in
load_entry_point('frog', 'console_scripts', 'frog')()
File "/home/me/src/salsa/frog/frog/commands.py", line 12, in main
inner_main()
File "/home/me/src/salsa/frog/frog/ngfp.py", line 284, in main
window = Window(width=cfg.img_pix*(cfg.game_cols+cfg.control_cols+3),
height=cfg.img_pix*(cfg.game_rows+2), caption="Ngfp", resizable=True,
fullscreen=False, visible=False)
File "/home/me/src/salsa/frog/frog/ngfp.py", line 63, in __init__
MyInitStuff (self)
File "/home/me/src/salsa/frog/frog/my_init.py", line 113, in MyInitStuff
self.game_bg_image = pyglet.image.load("png/mirrors/00_bg.png")
File
"/home/me/src/salsa/env/lib/python3.7/site-packages/pyglet/image/__init__.py",
line 180, in load
file = open(filename, 'rb')
FileNotFoundError: [Errno 2] No such file or directory: 'png/mirrors/00_bg.png'
(env) me@ant(152)~/src/salsa/test$
=
the paths are exactly the same when i print the current
directory.
the png directory is there and the image is there.
ugh, time to sleep...
ant
--
https://mail.python.org/mailman/listinfo/python-list
Re: ah, progress...
ant wrote: > ant wrote: > > ... > > script was there, but the package was not actually > installed. > > after installing again i get: > >= > > (env) me@ant(26)~/src/test$ ngfp > Traceback (most recent call last): > File "/home/me/src/env/bin/ngfp", line 7, in > from ngfp import main > ImportError: cannot import name 'main' from 'ngfp' > (/home/me/src/salsa/env/lib/python3.7/site-packages/ngfp/__init__.py) > >= > > i'm not sure if this is because my __init__.py is > another directory deeper (my project has a top level > directory with the setup.py in it and then the > ngfp directory with the __init__.py in it which > contains the following: > >= > name = "ngfp" >= > > which obviously says nothing about main... > i hate being a newbie. > > but at least i'm making progress. :) hmmm, but my main is defined in ngfp.py = ... def main(): window = Window(width=cfg.img_pix*(cfg.game_cols+cfg.control_cols+3), height=cfg.img_pix*(cfg.game_rows+2), caption="Ngfp", resizable=True, fullscreen=False, visible=False) pyglet.clock.schedule_interval(window.update, 1/120.0) # update at 60Hz pyglet.app.run() if __name__ == "__main__": main() = when i'm in the directory with the source code: $ python3 ngfp.py works exactly as it should. ant -- https://mail.python.org/mailman/listinfo/python-list
ah, progress...
ant wrote: ... script was there, but the package was not actually installed. after installing again i get: = (env) me@ant(26)~/src/test$ ngfp Traceback (most recent call last): File "/home/me/src/env/bin/ngfp", line 7, in from ngfp import main ImportError: cannot import name 'main' from 'ngfp' (/home/me/src/salsa/env/lib/python3.7/site-packages/ngfp/__init__.py) = i'm not sure if this is because my __init__.py is another directory deeper (my project has a top level directory with the setup.py in it and then the ngfp directory with the __init__.py in it which contains the following: = name = "ngfp" = which obviously says nothing about main... i hate being a newbie. but at least i'm making progress. :) ant -- https://mail.python.org/mailman/listinfo/python-list
Re: setup.py, how to find main program/module?
dieter wrote:
> ant writes:
>> ...
>> yet not quite all the way yet. i run the
>> commands to make the sdist and wheels and upload
>> it using twine to my test account, but when
>> i install it and try to run it the ngfp.py is
>> not found (i've also tried nfgp and main).
>> ...
>> i suspect i've not really understood entry
>> points and may not have it specified correctly in
>> setup.py.
>>
>> any help appreciated. :)
>
> I think you are right: the problem is likely with the
> "entry_points" specification.
>
>
> My "dm.zopepatches.ztest" package has
> entry_points = dict(
> console_scripts = [
>'ztest = dm.zopepatches.ztest:main',
>]
> ),
> This is responsible for the creation of a script called
> "ztest" in Python's "bin" directory.
>
>
> Does your "entry_points" specification look similar?
yes.
> Do you find corresponding scripts in Python's "bin" directory?
thank you,
yes, it is there:
=
(env) me@ant(9)~/src/env/bin$ more ngfp
#!/home/me/src/env/bin/python3
# EASY-INSTALL-ENTRY-SCRIPT: 'ngfp','console_scripts','ngfp'
__requires__ = 'ngfp'
import re
import sys
from pkg_resources import load_entry_point
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
sys.exit(
load_entry_point('ngfp', 'console_scripts', 'ngfp')()
)
=
(env) me@ant(11)~/src/test$ ngfp
Traceback (most recent call last):
File "/home/me/src/env/bin/ngfp", line 6, in
from pkg_resources import load_entry_point
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3126,
in
@_call_aside
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3110,
in _call_aside
f(*args, **kwargs)
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3139,
in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 581, in
_build_master
ws.require(__requires__)
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 898, in
require
needed = self.resolve(parse_requirements(requirements))
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 784, in
resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'ngfp' distribution was not found and
is required by the application
=
so, actually, the problem isn't what i expected it to be.
but i'm still not sure how to fix it. :)
ant
--
https://mail.python.org/mailman/listinfo/python-list
setup.py, how to find main program/module?
hello, i'm getting there... yet not quite all the way yet. i run the commands to make the sdist and wheels and upload it using twine to my test account, but when i install it and try to run it the ngfp.py is not found (i've also tried nfgp and main). test upload: https://test.pypi.org/project/ngfp/ i suspect i've not really understood entry points and may not have it specified correctly in setup.py. any help appreciated. :) to install it you'll need to use (to pull in pyglet): $ pip install --index-url https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple ngfp==0.1.5.post3 thank you and cheers, ant -- https://mail.python.org/mailman/listinfo/python-list
Python in Linux - barrier to Python 3.x
Hi all, I've just seen this: http://sheddingbikes.com/posts/1285063820.html Whatever you think of Zed Shaw (author of the Mongrel Ruby server and relatively recent Python convert), he has a very good point in this. I run Fedora 12 on my home computers, and find it far too much hassle to try to get Python 3 installed. Even the 2.x's are behind - IIRC think it currently uses 2.5. So I really think this is a barrier to entry to Python 3 that we could do without - it's the only reason I do all of my Python work in 2.x, I would jump at migrating to Python 3 if it was easily available on Fedora. Is there a solution to this that anyone knows of? Has Zed jumped to conclusions? Have I? -- http://mail.python.org/mailman/listinfo/python-list
Re: Python in Linux - barrier to Python 3.x
On Sep 21, 2:04 pm, Philip Semanchuk phi...@semanchuk.com wrote: On Sep 21, 2010, at 8:29 AM, Ant wrote: Don't know about Python 3 on Fedora (I use a Mac), but distrowatch.org reports that Fedora has been using Python = 2.6 since Fedora 11 which was released in June of 2009. Yes you are right - I've checked on my home machine, and it is indeed 2.6. Still, no Python 3 unless I upgrade to Fedora 13, and upgrading an OS in order to get the latest version of one package is a bit much! I know that this is a distribution issue, and not strictly a Python one, but the issue exists primarily because python is such a successful language it has become deeply embedded in linux distributions, and so there is now a lot of work involved in checking that a python upgrade doesn't break things. Some solution involving virtualenv is perhaps a possibility. -- http://mail.python.org/mailman/listinfo/python-list
Re: GUIs - A Modest Proposal
I don't know whether this thread is going backwards, forwards or sideways. But a lot of useful information is creeping out of the woodwork. I like the points about backwards compatibility. Presumably that reason alone is enough to keep Tkinter in the standard library for a long while. But the point has also been made that there are several things there that are - if not duplicates - at least alternatives. So would it be so awful to have Tkinter and GUI2 (whatever it is) in the stdlib, assuming that both had equivalent functionality? That would be the way to give people the choice. But it does imply that GUI2 is not too huge, to prevent excessive bloat (is that a tautology?). Other interesting comments: licencing. Can anyone give a concise summary of whether the 'major' GUIs have any insuperable licencing problems that would rule them out anyway? Programming is hard enough without lawyers. -- http://mail.python.org/mailman/listinfo/python-list
Re: GUIs - A Modest Proposal
Since I started this thread, I feel a sense of responsibility for it, in some bizarre way. Not to prolong its existence, which is clearly a troubling one for some, but to try to steer it towards some kind of consensus that will irritate the least number of people. Or better, that will gain some kind of support and momentum so that something happens. And since I have neither a reputation to lose, nor any great fondness for most of the proposed solutions, I will try to summarise some of the points made as impartially as I can. And I will add my own opinions; but a group as sophisticated as this will be able to spot them... 1 Although a few advocates of Tkinter have spoken in favour of it, most seem to think that: It's not particularly elegant, either in its use or its implementation with Tcl/Tk If we didn't have a GUI in the distribution, we wouldn't choose Tkinter now; it seems like its inclusion is a sort of historical accident. It may be all right for small projects, but once things get bigger, you have to throw away what you've done and use something else. Not many people use it anyway, so why bother? 2 Most people who have used a GUI have some investment in it. So arguments about which one is best tend to be partial and not wonderfully constructive. Indeed, about the only common thread that comes out seems to be a general dislike of Tkinter. 3 There is a surprising number of people who think that Python shouldn't have any 'favoured' association with a GUI at all. I find that surprising because of my own experience: I have written a few hundred Python programs over the last few years, mostly small and almost entirely for my own benefit. Most of those don't use a GUI. But whenever I write a program that someone else is going to use, it has to have a GUI. Is that not true for most people? 4 Some think that including any sort of GUI is 'bad'. People can choose the one they want from the large list available. I certainly don't want to stop people doing what they want. However many people have neither the time or the expertise to decide, and the experience of choosing the wrong one is a real turn-off. That, in my opinion, is where a replacement for Tkinter should be aimed: the beginning graphics programmer. But if it is built on the right foundation (which Tkinter seems not to be), it could be extended to cover far more useful cases than Tkinter can. 5 I should stop pontificating, and write code. If it's better than the existing, people will use it and it will become the standard. I don't think so. Even vast libraries of well-written code haven't become the standard. I seem to remember a DEC assembler manual from the last century, which said A standard doesn't have to be optimal, it just has to be standard (Feel free to correct me on that one. The last century seems like a long time ago). So I think comments like the system doesn't work like that - nothing happens till code is working miss the point. We are not talking about some vital but complex module or library here - it's more important than that. We are talking about the thing that the rest of the world sees as Python's biggest missing piece - the thing that beginning programmers look for and don't find - a decent, well- supported and elegant GUI. And who are the beginning programmers going to turn into? If we do our stuff right, Python programmers. If not, Java or PHP or Visual Basic programmers. Or website designers. Or worse (is there a worse?). So, to summarise the summary: I reiterate my call. Somebody has to get Tkinter out of the distribution and replaced by something that - as a minimum - doesn't get slagged off by nearly everyone. It can't be me - I don't have the clout. -- http://mail.python.org/mailman/listinfo/python-list
Re: GUIs - A Modest Proposal
I rather feel like I'm flogging a dead horse here, but time for another mile... First off, I'm not volunteering to lead this effort. I don't think anyone should even think about that until and unless the Python Powers That Be actually decide that it is worth doing. That is what I meant by 'strong leadership'. Second; 'A minor programming language'. According to http://www.tiobe.com/index.php/content/paperinfo/tpci/index.html Visual Basic is more popular than Python. That makes me feel that there is something wrong with the world. Third: I'm curious why you think fragmented GUI choices is a particular problem for Python compared to other languages? Or why this is the main issue holding Python back? It's not a particular problem for Python compared to other languages. It's a general problem for all programming languages. But I presume that you read this newgroup because you think Python is in some sense 'better' than other programming languages. And I think we can make it better still. Fourth: BTW, what's your plan for producing such a leader? Because if we don't have a leader it's kind of a moot point. (I know some people asked you to volunteer, but I suspect you would agree that you're not up to the task, so I assume you are merely a visionary and have someone lined up that you've somehow convince to do the dirty work of leadership.) I'm not a visionary and I don't have someone lined up. And I am certainly not up to the task myself. But I have watched with interest the process of turning Python2.x into Python3.x. Does that give any hints about who I think should be considering this topic (see first point)? -- http://mail.python.org/mailman/listinfo/python-list
Re: GUIs - A Modest Proposal
On Jun 6, 2:22 pm, ant shi...@uklinux.net wrote: I get the strong feeling that nobody is really happy with the state of Python GUIs. snip... What an interesting set of responses I got! And - even more interesting - how few of them actually seem to think there is a problem, let alone make any attempt to move the situation forward. I appreciate that there are proponents of many different GUIs. I am asking that all step back from their particular interests and - for example - try to see the situation from the viewpoint of - say - a Python newbie, or an organisation that is thinking of switching from (example only!) Visual Basic. I obviously didn't make my main point clearly enough; I'll restate it with a different emphasis: The default GUI shipped with Python is Tkinter. Few people seem to like it much. This has several consequences. - It has not blossomed, like Python has. - There are not hundreds of talented programmers making rapid and impressive improvements to it. - Books about Python use it in examples (because it IS the default), but imply that one should move on. The result that our hypothetical new recruit has to make a choice for the new, big project. Remember that GUIs have hundreds (sometimes thousands) of classes, functions and constants. Let alone idioms and design patterns. That is what I meant by 'Our resources are being dissipated'; the effort of learning, remembering and relearning a workable subset of these is substantial. So it would be good to be able to use One Right Way, not try several (as I have - I will admit I didn't try PyQt; GUI fatigue was setting in by then). If we are to make progress, I can see two obvious approaches: 1) Improve Tkinter to the point where it is supportable and supported by a good fraction of Python programmers or 2) Drop Tkinter as the default and use something else. If we choose 2) then we have a new set of possibilities: 2a) Use one of the 'major' GUIs, pretty much as is, but presumably with a lot more people supporting it if it is the default. 2b) Use one of the 'minor' GUIs, and get a lot of people working on it to make it really good. 2c) Start from scratch. With a project supported by the Community as a whole, with the agreed objective of being the default. None of these is easy. All require strong leadership and great committment. What surprises me is the apparent willingness of the Python community to let this issue slide. I can see that many people have committed to one GUI and want to use that forever. Fair enough. For the reasons I stated originally, I've not found one. I think a lot of people deep down are uneasy about this. My concern is simple: I think that Python is doomed to remain a minor language unless we crack this problem. -- http://mail.python.org/mailman/listinfo/python-list
GUIs - A Modest Proposal
I get the strong feeling that nobody is really happy with the state of Python GUIs. Tkinter is not widely liked, but is widely distributed. WxPython and PyGtk are both powerful, but quirky in different ways. PyQt is tied to one platform. And there are dozens more. Whether or not we like graphics programming, it's not going to go away. I get the uneasy feeling whenever I start a new project that there should be a 'better' GUI than the ones I currently use (WxPython and PyGtk). Fragmentation is our enemy. Our resources are being dissipated. Is it not time to start again? We have shown that it is possible to do the right thing, by creating Python3. I ask the group; should we try to create a new GUI for Python, with the following properties?: - Pythonic - The default GUI (so it replaces Tkinter) - It has the support of the majority of the Python community - Simple and obvious to use for simple things - Comprehensive, for complicated things - Cross-platform - Looks good (to be defined) - As small as possible in its default form If so, what are the next steps? The Python SIG on GUIs closed years ago. Should that be revived? This is A Modest Proposal (J. Swift). In a sense, I am suggesting that we eat our own babies. But don't we owe it to the community? -- http://mail.python.org/mailman/listinfo/python-list
Re: What text editor is everyone using for Python
On May 25, 6:35 pm, LittleGrasshopper seattleha...@yahoo.com wrote: With so many choices, I was wondering what editor is the one you prefer when coding Python, and why. I normally use vi, and just got I use GVim or vim if on a terminal. There are quite a few plugins and scripts I find invaluable, but most are not python specific, and many are home grown (if compiled against python, you can script vim using Python). -- http://mail.python.org/mailman/listinfo/python-list
Re: Performance java vs. python
On May 20, 6:46 pm, namekuseijin namekusei...@gmail.com wrote:
anyway, again, thanks for the laughs.
I'm a Java developer in my day job, and I use Jython for testing out
ideas and prototyping, due to the way Jython makes writing Java so
much easier... Those examples were spot on - things weren't much
simpler before generics, as you had casting going on everywhere. Not
to mention the nice primitive / object divide to add to the languages
complexity.
And the libraries in Java... Compare cat implementations:
# Python
fh = open(myfile.txt)
for line in fh:
print line
// Java
...
BufferedReader reader = new BufferedReader(new FileReader
(myfile.txt));
String line = reader.readLine();
while (line != null) {
System.out.println(line);
}
...
And that's without all of the class/main method boilerplate or try
catch block required due to checked exceptions.
I've taught both Java and Python, and the latter is far easier to pick
up and run with, from both a syntactic point of view and in the use of
the libraries.
--
http://mail.python.org/mailman/listinfo/python-list
matplotlib - overlaying plots.
Hi All, I am trying to get matplotlib to overlay a couple of graphs, but am getting nowhere. I originally thought that the following may work: x = [1,2,3,4,5] y = [2,4,6,8,10] y2 = [1,4,9,16,25] plot(x, y) plot(x, y2) Now this works as desired, however, the actual case I have is more like this: x = [1,2,3,4,5] y = [2,4,6,8,10] y2 = [.0001, .0002, .0003, .0004, .0005] Now the graph is useless, since the results are plotted on the same axis. What I really want is two different sets of axes, each scaled appropriately, but overlayed. The data I actually have, is one set of axes plotting distance against elevation, and a second plotting distance against speed. The former has (y-coord) units in the range 0-2000 ft and the latter 0 - 0.01 miles/second. I want them on the same graph, so points can be easily correlated, but overlayed so that each line has a different scale on the y-axis. The closest I can get is to have two subplots, one above the other. Thanks in advance, Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: matplotlib - overlaying plots.
On May 14, 3:52 pm, Hyuga hyugaricd...@gmail.com wrote: ... On the other hand, I just took a peek at the matplotlib example gallery, which is very diverse, and it has an example that I think is exactly what you're looking for:http://matplotlib.sourceforge.net/examples/api/two_scales.html Superb - spot on. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: Which python version do I use with virtualenv?
On May 7, 8:03 am, OldGrantonian oldgranton...@googlemail.com wrote: ... I had Python 2.6 on my laptop. I needed easyinstall to install virtualenv. During installation of easyinstall, I got the message Python 2.5 not found So I installed Python 2.5, then installed virtualenv So I now have c:\Python 2.5 and c:\Python 2.6 ... Sounds like you've downloaded the Python 2.5 version of Easy Install. If I were you I'd uninstall Python 2.5, and re-install easy_install using the correct exe for Python 2.6. Check that typing 'python' on the commandline still works, as installing and uninstalling 2.5 may have messed up your path. if it has, either manually add the Python install directory to the path, or reinstall Python 2.6. Note: have you changed the default install folder? I haven't got Vista, but on XP it installs to c:\Python26 not C:\Python 2.6. I'd be carefull of changing the default install directory of Python, particularly if you are non-techy as some packages installers may look for Python in the default location. -- Ant -- http://mail.python.org/mailman/listinfo/python-list
Re: Cannot find text in *.py files with Windows Explorer?
On Apr 4, 7:09 am, Tim Golden m...@timgolden.me.uk wrote: ... Now I think about it, try searching for xplorer2 ... I'll second that. It's one of the few non-open source bits of software that I'll willingly pay a license for. Have used it for around 5 or 6 years now. It's by a little 1 man company called Zabkat. -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: file.read() doesn't read the whole file
On Mar 24, 7:59 am, Sreejith K sreejith...@gmail.com wrote: ... data is the whole file, but 'less' gives only the two lines... From this statement (that you are using less), it appears that you are redirecting sys.stdout to a file or similar - if that is the case, you may need to flush or close the output file before it picks up any changes. -- http://mail.python.org/mailman/listinfo/python-list
Re: 2to3 Help?
On Jan 15, 6:43 am, James Mills prolo...@shortcircuit.net.au wrote: ... That is a good idea :) Windows teaches you nothing! Not true. Windows teaches you the art of the workaround... -- http://mail.python.org/mailman/listinfo/python-list
Re: Regexp
A 0-width positive lookahead is probably what you want here: s = ... hdhd a href=http://mysite.com/blah.html;Test iString/i OK/ a ... ... p = r'href=(http://mysite.com/[^]+)(.*)(?=/a)' m = re.search(p, s) m.group(1) 'http://mysite.com/blah.html' m.group(2) 'Test iString/i OK' The (?=...) bit is the lookahead, and won't consume any of the string you are searching. I've binned the named groups for clarity. The beautiful soup answers are a better bet though - they've already done the hard work, and after all, you are trying to roll your own partial HTML parser here, which will struggle with badly formed html... -- http://mail.python.org/mailman/listinfo/python-list
Re: drive a desktop app from python?
On Jan 8, 9:06 pm, Tim Arnold tim.arn...@sas.com wrote: Is there any lib or recipe(s) for doing something like this via python? Look into the PyWin32 extension module. It gives access to Windows internals including the COM interface. You'll need to do some research into how to automate the GUI you're using from other sources (there are often VBA examples on the web that can be modified). http://pywin32.sourceforge.net/ I've successfully used this in the past for automating MS Excel. -- http://mail.python.org/mailman/listinfo/python-list
Re: Generator metadata/attributes
You could look at something like the following to turn the class
iteslf into a decorator (changed lines *-ed):
class TaggedWrapper():
* def __init__(self, logMixin, stream):
self.__tag = '%...@%s' % (logMixin.describe(), stream)
logMixin._debug('Created %s' % self)
def __next__(self):
return next(self.__generator)
def __str__(self):
return self.__tag
def __call__(self, generator):
self.__generator = generator
return self
and then decorate your generator:
@TaggedWrapper(mixin, stream)
def myGen;
for a in range(1,100):
yield a
(Disclaimer: Completely untested...)
--
http://mail.python.org/mailman/listinfo/python-list
Re: My last working day of 2007
On Jan 5, 9:47 am, Jack.Chu working...@gmail.com wrote: Hello guys: I created a simple tool to count how I wasted my time day by day ;-)http://www.flickr.com/photos/34017...@n07/3169438647/sizes/o/ Looks interesting - did you have some sort of time machine to be spending that much time in Chrome at the end of 2007? ;-) I just want to get suggestions to improve it, ... It's a bit hard to tell just from the screenshot... Do you have some code we could look at? Would be perhaps good to sub-log each window's title so that you could subdivide, for example, Firefox's time by the pages you were looking at (this would work quite well for numerous apps.) -- http://mail.python.org/mailman/listinfo/python-list
Re: Emacs vs. Eclipse vs. Vim
On Nov 29, 8:44 pm, Josh [EMAIL PROTECTED] wrote: If you were a beginning programmer and willing to make an investment in steep learning curve for best returns down the road, which would you pick? Personally I'd choose Vim for the following reasons: 1) Vim is ubiquitous on Linux/Unix servers. If you learn Vim you will be able to edit files on a server without doing the FTP to local machine/edit locally/upload back by ftp dance I see so many developers and even sys admins doing... 2) Vim is a proper editor. Eclipse is an IDE. They are really incomparable. I personally hate working in Eclipse, but the IDE features make it the obvious choice for Java development. I prefer Vim for Python development. I also have Vim set up as an external editor in Eclipse, so any repetitive or difficult editing in Eclipse is done in Vim. 3) Vim makes it simple to cut log files down to size. The g command is a godsend for this. :g/DEBUG/d will for example remove all debug lines from the file. :g!/My message/d will delete all lines other than lines containing My message, and :g/./norm dt- will delete everything up until the first '-' (normal mode, delete 'till '-'). Combine these and you'll have the info you want, formatted in the way you want it very quickly. 4) Vim can be scripted in Python, and has a host of useful plugins. 5) Vim has close interaction with the command line (though no built-in console like emacs). Finished editing a file? type :!svn commit -m Done fixing this % and the current file (%) is committed into subversion. :%!sort will filter the current buffer through an external sort program, and change the buffer to the result. Now emacs will also satisfy points 2-5 (not sure how easy 3 is, but I'm certain it's comparable). In fact emacs will initially have a lower learning curve, since it its not modal, and so wihout learning any keystrokes, you can use it just like a basic editor and gradually learn the commands. (1) for me is a compelling reason to use vim all other things being equal. Also, if you touch type, or aspire to, then Vim makes more sense than emacs, since almost everything can be done from the main keys, rather than emacs CTL-ALT-SHIFT x u type key contortions... Certainly don't bother with Eclipse unless your starting as a Java programmer (and even then learn vim as well) - it is very good at inserting boilerplate code for you, but as an editor offers little more than Windows Notepad... I personally use Gvim for a great deal of my work, from those taskd -- http://mail.python.org/mailman/listinfo/python-list
Re: Python search path (on Windows)
On Oct 22, 10:03 am, wooly booly [EMAIL PROTECTED] wrote: I would like to execute a Python script from Windows command line: Python myscript.py This works if myscript.py resides in the current folder. My question is: Is it possible to execute the command above from another folder? I put the script's folder in the PYTHONPATH environment variable but this didn't help. Thanks for your help! You can put the script directory in the PATH environment variable, and call it with just: myscript.py -- http://mail.python.org/mailman/listinfo/python-list
Re: Problem with Python shell through Cygwin Screen (Python/Vim/Screen combo)
On Sep 19, 7:08 pm, Jason Tishler [EMAIL PROTECTED] wrote: ... There are known issues when trying to run a Windows program that directly accesses the console under Cygwin. For example: http://mail.python.org/pipermail/python-list/2004-June/21.html AFAICT, you will have to use Cygwin Python with screen. Thanks for the info. Shame but - cygwin python for this setup it is (Though I may hunt for a native windows port of screen rather than the cygwin one.) Cheers, Ant. -- http://mail.python.org/mailman/listinfo/python-list
Problem with Python shell through Cygwin Screen (Python/Vim/Screen combo)
Hi all, There's a sweet combination of tools that you can assemble using Vim, a Python shell (or any shell for that matter) and GNU screen, where you essentially send selected text from Vim to the Python shell. (See http://technotales.wordpress.com/2007/10/03/like-slime-for-vim/ for more details - though I had to tweak the script a bit to get it to work on Windows - line ending interpretation problem) This works great in Linux, and also in Windows using the Cygwin build of Python, but when you call: screen -S py -s python using the Windows build of Python, the shell just hangs. Does anyone know if this is a known issue with screen/Python, or if there is a workaround, as I'd prefer to have just a single Python instance installed rather than having Cygwin python and windows Python both installed. Cheers, Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: complex numbers should respect the I representation
On Jun 28, 1:48 pm, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: I think complex numbers should respect the i or I representation, instead of j. No reason being cute and using a different character instead of the traditional representation? At least have the decency of supporting the orginal representation? You're looking at this from a very narrow perspective. i is indeed the common notation in the realm of mathematics. However, in the realm of engineering, j is more common (i is used for current). So given that both i and j are in common usage for denoting a complex number, and that i is common for indexing, then j is a perfectly reasonable notation for Python to use. Programmers use j as frequently as i as indexing variable, I see no reason choosing j over i. Have some respect for majority's rules. This is childish. Do some research before flaming on a subject on which you only have one side of the story. -- Ant -- http://mail.python.org/mailman/listinfo/python-list
Pyparsing Question
Hi all, I have a question on PyParsing. I am trying to create a parser for a hierarchical todo list format, but have hit a stumbling block. I have parsers for the header of the list (title and description), and the body (recursive descent on todo items). Individually they are working fine, combined they throw an exception. The code follows: #!/usr/bin/python # parser.py import pyparsing as pp def grammar(): underline = pp.Word(=).suppress() dotnum = pp.Combine(pp.Word(pp.nums) + .) textline = pp.Combine(pp.Group(pp.Word(pp.alphas, pp.printables) + pp.restOfLine)) number = pp.Group(pp.OneOrMore(dotnum)) headtitle = textline headdescription = pp.ZeroOrMore(textline) head = pp.Group(headtitle + underline + headdescription) taskname = pp.OneOrMore(dotnum) + textline task = pp.Forward() subtask = pp.Group(dotnum + task) task (taskname + pp.ZeroOrMore(subtask)) maintask = pp.Group(pp.LineStart() + task) parser = pp.OneOrMore(maintask) return head, parser text = My Title Text on a longer line of several words. More test and more. text2 = 1. Task 1 1.1. Subtask 1.1.1. More tasks. 1.2. Another subtask 2. Task 2 2.1. Subtask again head, parser = grammar() print head.parseString(text) print parser.parseString(text2) comb = head + pp.OneOrMore(pp.LineStart() + pp.restOfLine) + parser print comb.parseString(text + text2) #=== Now the first two print statements output the parse tree as I would expect, but the combined parser fails with an exception: Traceback (most recent call last): File parser.py, line 50, in ? print comb.parseString(text + text2) . . [Stacktrace snipped] . raise exc pyparsing.ParseException: Expected start of line (at char 81), (line:9, col:1) Any help appreciated! Cheers, -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyparsing Question
Hi Paul, LineStart *really* wants to be parsed at the beginning of a line. Your textline reads up to but not including the LineEnd. Try making these changes. 1. Change textline to: textline = pp.Combine( pp.Group(pp.Word(pp.alphas, pp.printables) + pp.restOfLine)) + \ pp.LineEnd().suppress() Ah - so restOfLine excludes the actual line ending does it? 2. Change comb to: comb = head + parser Yes - I'd got this originally. I added the garbage to try to fix the problem and forgot to take it back out! Thanks for the advice - it works fine now, and will provide a base for extending the list format. Thanks, Ant... -- http://mail.python.org/mailman/listinfo/python-list
Batteries Included...
Today's XKCD comic has a nice Python reference! http://xkcd.com/413/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Somebody *really* got fond of python
On Apr 21, 12:23 pm, Diez B. Roggisch [EMAIL PROTECTED] wrote: http://xkcd.com/413/ :) Didn't realise you'd posted this when I posted my Batteries Included... post. Amused me as well! -- http://mail.python.org/mailman/listinfo/python-list
Re: Efficient way of testing for substring being one of a set?
On Apr 3, 12:37 pm, [EMAIL PROTECTED] wrote: What's the neatest and/or most efficient way of testing if one of a A different approach: words = [he, sh, bla] name = blah True in (word in name for word in words) True name = bling True in (word in name for word in words) False Perhaps not as obvious or readable as Jeff's example, but is essentially doing the same thing using generator syntax. -- http://mail.python.org/mailman/listinfo/python-list
Re: Efficient way of testing for substring being one of a set?
On Apr 3, 2:27 pm, George Sakkis [EMAIL PROTECTED] wrote: ... It's even prettier in 2.5: any(word in name for word in words) George And arguably the most readable yet! -- http://mail.python.org/mailman/listinfo/python-list
Re: Is this a good time to start learning python?
On Mar 31, 5:40 pm, Rui Maciel [EMAIL PROTECTED] wrote: ... So far the decision seems to be a no brainer. Yet, Python 3000 will arrive in a few months. As it isn't backwards compatible with today's Python, there is the risk that no matter what I learn until then, I will end up having to re-learn at least a considerable part of the language. To put it in other words, I fear that I will be wasting my time. Not at all. The lead developers have a plan for migrating older scripts to 3000 automatically (or at least semi-automatically). This can be done because the core syntax and builtin's are remaining largely the same. The sort of thing that is changing in a way that breaks backward compatibility are things such as removing the print statement (e.g. print Hello world) with a print function (e.g. print(Hello world)) and rearranging the standard library. As Terry said, the major changes are additions and deletions - to expand on this, the deletions are generally likely to be modules that are rarely used or are unmaintained. In any case, the python developers have a very good policy of making the upgrade path to new versions of Python smooth. Generally new features are released into the __future__ module in a release ready for inclusion in the next release. This allows time to play with new features before the official release of the feature comes out. Module deletions usually hang around for a few releases as deprecated before being permanently removed - again giving time to catch up. I believe that the deprecation speed may come rather abruptly with 3000, however the 2.6 release will contain a PyLint program for identifying changes that will need to be made before migrating to 3k. In addition, the 2.x branch is AFAIK going to be maintained up to (but no further than) a 2.9 release. So there will be plenty of time to adjust! In short, any time invested in learning Python at this stage (except perhaps old-style classes as pointed out above) will be time well spent, as learning Python 3000 will be minor tweaks to what you'll already know. And for what it's worth, I've programmed in Haskell, C, Java (Java's my profession), Javascript and Perl, and dabbled with Ruby, Lisp, Groovy (and probably others), and Python is by far my favorite language, not just for the clean syntax, rapid development, readability 5 years down the line etc, but also for the community, which is very helpful and knowledgeable. BTW. I have to disagree with Andrew's comment: With Perl, once you get the core syntax down, you don't need to master Perl. Instead you just look up the module/feature you want to use and just use it.. This may be true for knocking up Perl scripts, but for reading *other peoples* code in any language you need to have a good mastery of the core language. In Perl this is a quagmire of strange syntax, special cases, multiple ways to do the same thing and esoterica/magic, whereas Python's design to make whitespace significant and its One (obvious) way to do things philosophy makes reading other peoples code much easier. (Of course other peoples code always sucks, but hey ;-) -- http://mail.python.org/mailman/listinfo/python-list
Re: News from Jython world
On Mar 3, 6:40 pm, Sébastien Boisgérault [EMAIL PROTECTED] wrote: Frank Wierzbicki and Ted Leung have been hired by Sun. Frank is a key Jython developer and is specifically hired to work full time on Jython, a version of the Python interpreter that runs on top of the JVM and provides full access to Java libraries. After a period where the development had slowed, Jython was recently getting seriously back on track. Now it's getting even better ! Development on Jython over the last year or so has been superb, and it's good to see that Sun are getting really focused on dynamic languages on the JVM. It may be that they are trying to play keep-up with Microsoft and their support of IronPython - but regardless of the reasons it is good news for Jython and Frank W, and for the Python community in general. A Sun endorsement of Jython means the possibility of more Python jobs out there for us all in the future given the ubiquity of the JVM in the enterprise and willingness of corporations to accept such endorsements! -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python self-evaluating strings
In the spirit of Simple is better than complex. and totally bypassing the intention of quines (though not necessarily the definition): --- probably_not_a_real_quine.py import sys for line in open(sys.argv[0]): print line, -- ;-) -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python too slow?
On Jan 10, 12:04 pm, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: For the most part, I agree with you, which is why I chose Python in the first place. I like quick development. Unfortunately, this is one of those cases where execution time is a factor. Who knows, maybe someone who's done camera vision with Python will come in and say it's just the algorithm in the example that needs work (I'm crossing my fingers that that's the case). It would probably be worth reposting your question with a different subject line. Something along the lines of Image/Video processing performance in Python, and explaining what you actually want to achieve. Python too slow? doesn't give enough information - clearly Python is fast enough for many many tasks, since it is so widely used. It also sounds like a troll - so many people who would actually be able to assist you (such as the PIL, pygame and numpy/scipy communities) may have ignored this thread. Cheers, -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: Learning Python via a little word frequency program
I'm interested to learn how more experienced Python folks would solve this little problem. I think I'd do the following: from collections import defaultdict names = freddy fred bill jock kevin andrew kevin kevin jock freq = defaultdict(lambda: 0) for name in names.split(): freq[name] += 1 pairs = [(v, k) for k, v in freq.iteritems()] for v, k in reversed(sorted(pairs)): print %-10s: %d % (k, v) defaultdict makes the frequency accumulation neater. reversed(sorted(pairs)) avoids the little -v hack and makes it more obvious what you are doing. Of course this could also be achieved by doing pairs.sort() and pairs.reverse() before iterating over the pairs list. Cheers, -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Jython: Honourable mention on Charles Nutter's blog.
Hi all, The Jython team got an honourable mention on the Headius blog this morning. Apparently they have got Django working with the latest builds of Jython: http://headius.blogspot.com/2008/01/jythons-back-baby.html So congratulations! -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: Extracting files from an ISO image?
On Jan 2, 7:07 pm, Rob Williscroft [EMAIL PROTECTED] wrote: Ant wrote in news:34a84caa-5387-40a2-a808- 1) Is there a module out there for extracting files from an ISO? There are command line programs that can do this: http://cdrecord.berlios.de/old/private/cdrecord.html ... One problem you may have is daemon tools will mount cd images that aren't iso images, where as isoinfo appears to handle only genuine iso file systems. Cheers for the pointers. I'll try out the isoinfo tool, as my intention was to extract the images on the fly. If it turns out to be slow though (or problematic - I assume you mean that images in e.g. joliet format may not be parsed properly), I'll probably end up extracting the images and caching them on disk on the addition of new iso's by simply mounting the image as Grant pointed out. And it looks like wxPython may have support for icons in an img2py script, so that may sway me toward wxPython over TkInter. Cheers, -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Extracting files from an ISO image?
Hi all, My kids have a bunch of games that have to be run from CD (on Windows XP). Now they're not very careful with them, and so I have a plan. I've downloaded a utility (Daemon Tools) which allows me to mount and unmount virtual CD drives onto an ISO image. This works well, but I want to wrap this in a Python GUI which will present them with a list of games in a particular directory. Essentially the steps are this: 1) Look for all .iso files in a directory 2) Pull out the autorun.inf from the iso (if present) and parse it to get the name of the icon file. 3) Extract the icon file from the iso and pull the image out. 4) Display the icon along with the iso name in a TKinter (of maybe WxWidgets) app. The images are important, as our 2 year old doesn't read (obviously), but can navigate around the desktop by icon. So I have two questions really: 1) Is there a module out there for extracting files from an ISO? 2) Is there a module out there for extracting icons from a Windows exe? Cheers, -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: Are Python deques linked lists?
On Dec 9, 10:54 pm, John Machin [EMAIL PROTECTED] wrote: On Dec 10, 9:43 am, Just Another Victim of the Ambient Morality [EMAIL PROTECTED] wrote: I'm looking for a linked list implementation. Something iterable with constant time insertion anywhere in the list. It's on the shelf between the jar of phlogiston and the perpetual motion machine. lol! -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Why did no one tell me about import antigravity?
Python on xkcd: http://xkcd.com/353/ -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: python vs pythonw
On Nov 30, 3:30 am, John Velman [EMAIL PROTECTED] wrote: New to mac. I have leopard. What's the difference between python and pythonw? So far (which isn't very far) I can't tell the difference. I have a small application using TKinter that I was working on under Linux. Both python and pythonw run it, but on both it stops responding (pinwheel of death) when I touch the vertical scrollbar. On Windows, python runs in console mode (and pops up a console window if you're not executing the script from a console already), pythonw runs the script as a background process. I'd imagine that it is the same for the Mac, and I shouldn't think it has anything to do with your problem here. -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: Witch editor to use!
On Nov 30, 9:10 am, SMALLp [EMAIL PROTECTED] wrote: Hello! I'm new in wxPython and before i start doing anything I have one qustion. Shoul I use some of editors like boa, spe or shoud i use my favorite text editor! i used IDLE on windows and it seamd nice. Now i have linux installed on my mashine and boa works, spe wont start, IDLE crashes when compailinfg! And if editor is bether choice witch one to use! One with a spell checker would be a good start. -- http://mail.python.org/mailman/listinfo/python-list
Re: foldr function in Python
On Nov 22, 7:14 pm, oj [EMAIL PROTECTED] wrote: On Nov 22, 3:02 pm, Ant [EMAIL PROTECTED] wrote: ... It's basically just one line to implement: foldr = lambda f, i: lambda s: reduce(f, s, i) It's just reduce with currying, I'm not sure it adds that much to what python already offers. Yes it's easy to implement. I did it in two steps because I think it's easier to read. That's not the point I'm trying to make though. sum, any and all are trivial to implement, yet they made it into the builtin methods. The point of those functions I believe to be to promote easier to understand idioms. Without them people will continue to write ad hoc reduce based versions (which are less readable and less efficient). With sum, any and all in the standard library, it becomes easier to write readable code, and so people will be more likely to do so. The other benefit is to promote ways of thinking about code that you may not have come across or thought about before. This is a common situation when learning new languages - before learning python I would never have thought to use map or reduce functions, and these are trivially easy to implement. So my point really is that foldr (perhaps renamed to make_reducer or something) could create idioms that are more readable than using reduce directly. -- http://mail.python.org/mailman/listinfo/python-list
Re: foldr function in Python
On Nov 23, 10:54 am, Steven D'Aprano [EMAIL PROTECTED] cybersource.com.au wrote: ... Alas and alack, I believe that Guido has a distaste for all but the simplest functional idioms, and an irrational belief that anything using reduce() must be too complex to bear. reduce() is going away, not just from the built-ins but (I believe) from the standard library as well. I thought that at the last count it was merely being moved out into functools (or somewhere similar). -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: may be a bug in string.rstrip
On Nov 23, 4:09 am, kyo guan [EMAIL PROTECTED] wrote:
...
'120.exe'.rstrip('.exe')
Another approach since you seem to be working with filenames is using
the os.path module:
import os.path as path
s = test.torrent
t = test.exe
u = test
path.splitext(s)[0]
'test'
path.splitext(t)[0]
'test'
path.splitext(u)[0]
'test'
--
http://mail.python.org/mailman/listinfo/python-list
foldr function in Python
Hi all, I've just been reading with interest this article: http://caos.di.uminho.pt/~ulisses/blog/2007/11/20/foldr-the-magic-function/ It's a useful function that (with a more intuitive name) could prove a compelling addition to the itertools module. In it's python form, it would be something like this: def reduce2 (fn, init, seq): return reduce(fn, seq, init) def foldr (function, initial): return partial(reduce2, function, initial) It's a bit different from the other itertools functions, in that rather than producing an iterator, it produces a function which reduces a iterator to a singe value. The advantages I see over reduce are that (a) it provides incentive to document the code and (b) it promotes reuse. For example: value = reduce(lambda x, y: %s%s%s % (x, , if x else , y), myList, ) vs. commaSeparate = foldr(lambda x, y: %s%s%s % (x, , if x else , y), ) commaSeparate(myList) Of course the lambda function in this case could be a named function, helping with both readability and reuse, but I think the latter is conceptually easier to grasp when reading the code. Discuss. -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: Using Python To Change The World :)
On Nov 14, 3:09 am, [EMAIL PROTECTED] wrote: ... so here is MY question: how would you replicate a street intersection in python? and furthermore, how would you do you have the cars move up and down those streets. I've never used it, but I'd have thought that pygame would satisfy the graphical side of things. -- Ant -- http://mail.python.org/mailman/listinfo/python-list
Re: Trouble with for loop
On Nov 6, 9:59 am, Shriphani [EMAIL PROTECTED] wrote: ... My main intention is to state that each of the variables namely a, b, c, ## can take value from 1 to 9. How do I go about this ? It sounds like you are after something like: for var in (a, b, c, d, e, f): assert var in [1, 2, 3, 4, 5, 6, 7, 8, 9] but it's hard to tell without some more information from you on exactly what you are trying to achieve. -- http://mail.python.org/mailman/listinfo/python-list
Re: What is Jython?
On Nov 1, 6:54 am, [EMAIL PROTECTED] wrote: ... I would like to know more about Python and Jython? What is the difference between both of them? What is the future for Jython and which are the areas where it is used? Jython is an implementation of Python for the Java VM. Currently it stands as equivalent to Python v2.2, but progress has been rapidly accelerating over the last year or so, and the next version will probably be targeted at 2.5 AFAIK. Jython also has access to all of the Java standard libraries (or any Java libraries on the classpath for that matter.) Jython is currently significantly slower than Python. From my experience Jython is most typically used as an embedded extension/scripting language for Java applications in areas where rapid development/change is required. This includes such areas as scripting business logic, writing unit or functional tests etc. Take a look at http://antroy.blogspot.com/2007/04/swing-testing-with-jython-and-jemmy.html for an example of how I have successfully used Jython for Swing testing. More information can be found on http://www.jython.org/Project/index.html Cheers, -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: permuting over nested dicts?
On Nov 1, 9:12 am, Anand [EMAIL PROTECTED] wrote: ... This code works for dictionaries of any nested level. At least up to the max recursion depth. -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: What is Jython?
On Nov 1, 11:37 am, Ze'ev [EMAIL PROTECTED] wrote: ... ... Jython is currently significantly slower than Python. ... Not according to this :http://blogs.warwick.ac.uk/dwatkins/entry/benchmarking_parallel_pytho... Well I'm damned - I thought that I'd be writing about this being a parallel example, and Java (and hence Jython)'s better threading support. Decided to run a few of my old mathchallenge scripts through both Python and Jython, and on some of the examples Python was running almost 4 times slower... So that's parallel processing and mathematical processing that seems faster in Jython. It's be interesting to see a proper comparison of how different types of program run. The VM startup overhead is much slower mind, but then that's only an issue for very small programs. Cheers, -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: What is Jython?
On Nov 1, 1:23 pm, Ant [EMAIL PROTECTED] wrote: On Nov 1, 11:37 am, Ze'ev [EMAIL PROTECTED] wrote: ... ... Jython is currently significantly slower than Python. ... Not according to this :http://blogs.warwick.ac.uk/dwatkins/entry/benchmarking_parallel_pytho... ... So that's parallel processing and mathematical processing that seems faster in Jython. It's be interesting to see a proper comparison of how different types of program run. Simple rexex processing of a large log file on the other hand was 10x faster in Python than Jython, so I guess it depends on what you want to achieve. -- Ant -- http://mail.python.org/mailman/listinfo/python-list
Re: python with braces pre-processor
On Oct 22, 10:44 am, Paul Brauner [EMAIL PROTECTED] wrote: Hi, I'm working on a project that outputs several languages including (hopefully) python. My problem is that the generic backend architecture has not been designed to output correctly indented code, and that would be helpful if there were somewhere a python pre-processor that would take python with braces as an input and output regular python code. I thought that it must exists because everyone generating python code will encounter more or less the same problem, but I didn't find any 'official' There's a tool in the standard Python distribution that processes code with commented end statements. eg: def my_funct(): pass # end or similar, and indents it correctly. This may be a possibility for your purposes. -- http://mail.python.org/mailman/listinfo/python-list
Re: python with braces pre-processor
On Oct 22, 10:58 am, Paul Brauner [EMAIL PROTECTED] wrote: I'll look at that. Thanks a lot ! I've just had a look, it's the pindent.py script in Tools/Scripts (at least it is on Windows). It takes code of the following form: def foobar(a, b): if a == b: a = a+1 elif a b: b = b-1 if b a: a = a-1 # end if else: print 'oops!' # end if # end def foobar The help in the script looks pretty good. -- Ant... -- http://mail.python.org/mailman/listinfo/python-list
Re: Iteration for Factorials
On Oct 22, 1:26 pm, Py-Fun [EMAIL PROTECTED] wrote: I'm stuck trying to write a function that generates a factorial of a number using iteration and not recursion. Any simple ideas would be appreciated. The following simple adder functions should give you an idea of how recursion can be recast as iteration: def acc(i): '''i should be a positive integer''' if i 0: return i + acc(i - 1) return 0 print acc, acc(9) def itt(i): '''i should be a positive integer''' out = 0 while i 0: out += i i = i - 1 return out print itt, itt(9) ... Is it a factorial though? Er, no. And neither is mine. You may want to google for the definition of factorial! Here's a hint: reduce(operator.mul, range(1, i + 1)) -- Anthony Roy -- http://mail.python.org/mailman/listinfo/python-list
Re: question about for cycle
On Sep 29, 11:04 am, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: ... What should I do if I want the outer for cycle to continue or break ? If I put a continue or break in the inner cycle, it has no effect on the outer cycle. I'd also be interested in the idiomatic solution to this one. I can see a number of solutions, from the ugly: for i in range(10): do_break = True for j in range(10): if j == 6: break else: do_break = False if do_break: break This will break the outer loop if the inner loop exited with a break. Using exceptions: for i in range(10): try: for j in range(10): print i, j if j == 6: raise MyException except MyException, e: break # or continue or whatever. Encapsulating in a function and using return: def get_value(): for i in range(10): for j in range(10): print i, j if j == 6: return fn(i, j) I guess to an extent it would depend on the exact situation as to which of these is more suitable. Are there any other recommended solutions to this? -- Ant... -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3.0 migration plans?
I've posted my vote. However, I guess it won't be that simple in practice. I suspect that the following is more likely: 1) Migrate to 3000 fairly soon after release for scripts and new projects for which required third party modules are available for 3k 2) Migrate existing projects to 3k a) when frameworks/modules that they use are available and b) if and when doing so would be advantageous. I suspect that many of the projects I have that are solid and are in no imminent need of development will remain 3k for several years. Cheers, -- Ant -- http://mail.python.org/mailman/listinfo/python-list
Re: An Editor that Skips to the End of a Def
On Sep 21, 4:47 am, W. Watson [EMAIL PROTECTED] wrote: How about in the case of MS Win? Both emacs and vim have GUI versions that run on Windows. -- Ant... -- http://mail.python.org/mailman/listinfo/python-list
Re: How to insert in a string @ a index
On Sep 10, 3:15 am, a.m. [EMAIL PROTECTED] wrote: Thanks guys for you help. I ended up doing this way (for the records)... t1 = hello world hello. hello. \nwhy world hello ... Another approach may be to use the re module's sub function: import re t1 = 'hello world hello. hello. \nwhy world hello' def matchHandler(match): if test here: return XYZ + match.group(0) else: return match.group(0) re.sub(keyword, matchHandler, t1) The nice thing about this approach is that you could store keyword: test_function pairs in a dictionary, and reuse this whole block of code for arbitrary keywords with arbitrary rules. -- Ant... -- http://mail.python.org/mailman/listinfo/python-list
Re: python 2.5 problems
On Sep 9, 6:57 pm, O.R.Senthil Kumaran [EMAIL PROTECTED] wrote: Finally deleted 2.2 and loaded 2.5 (see below), using Dont delete. Uninstall python 2.2 and additional modules if you have installed them. But since you've already deleted 2.2, download and reinstall 2.2, uninstall 2.2 and 2.5 via Add/Remove Programs and then reinstall 2.5 again. -- Ant... -- http://mail.python.org/mailman/listinfo/python-list
Re: sys.argv is munging my command line options
On Aug 29, 8:11 pm, Chris Allen [EMAIL PROTECTED] wrote: ... But I'm running into a problem with this which is that sys.argv splits my key=value options. I need to know the option associations, and there's no way to know this by inspecting sys.argv. Can I get access to the command line string as python saw it before it split it into sys.argv or is there another way? Thanks. Could you show us some example code that demonstrates this? The following works as expected for me on win32: # test.py import sys for arg in sys.argv[1:]: print arg From the command prompt: C:\0test.py action key=value key=value action key=value key=value -- Ant. -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbee Question
On Aug 20, 11:47 pm, [EMAIL PROTECTED] wrote: ... Thanks for the help. By the way I am trying to learn the python after work and on weekends. If it was a dumb question, to this group, I will not bother you all again. It's not so much that it was a dumb question, but that it was asked in a dumb way :-) You'll get the most help in this group if you can show some evidence that you've had a go (the size of this thread ironically trounces that argument of course ;-) .) It's better to learn if people give you a critique of your own attempt at the code, rather than looking at other peoples efforts. There's a guide on how to ask good questions here: http://www.catb.org/~esr/faqs/smart-questions.html For what it's worth, here's a gratuitous version using generators, and one you should come back to once you've mastered the basics of Python: def counter(std_rate, over_rate, limit): stops = 0 while True: stops += 1 wage = stops * std_rate + max(0, stops - limit) * (over_rate - std_rate) yield stops, wage truck = counter(0.4, 1.4, 22) for i in range(30): print Stopped %s times, with accumulated wage of $%s % truck.next() -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: The folder a script is executed in
On Aug 21, 10:10 am, [EMAIL PROTECTED] wrote: ... myLocation = GetMyLocation() print myLocation C:/folder Do you mean the folder containing the script? Or the current working directory? If the former, then look at os.path.split(sys.argv[0])[0] If the latter, try something like: os.path.abspath(os.curdir) -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: The folder a script is executed in
On Aug 21, 10:29 am, [EMAIL PROTECTED] wrote: On 21 Aug, 11:27, Ant [EMAIL PROTECTED] wrote: On Aug 21, 10:10 am, [EMAIL PROTECTED] wrote: ... myLocation = GetMyLocation() print myLocation C:/folder Do you mean the folder containing the script? Or the current working directory? If the former, then look at os.path.split(sys.argv[0])[0] If the latter, try something like: os.path.abspath(os.curdir) -- Ant... http://antroy.blogspot.com/ The following code - import os import sys print os.getcwd() + . print os.path.split(sys.argv[0])[0] + . gives me - C:\Documents and Settings\me\Desktop. . Which looks correct. You've executed the code in an interactive session launched from a desktop shortcut at a guess. You won't get the location of the script unless you are actually running a script :-). Of course you'll get a current working directory however you are running python. -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: The folder a script is executed in
On Aug 21, 10:47 am, Bjoern Schliessmann usenet- [EMAIL PROTECTED] wrote: Ant wrote: ... | print os.path.split(sys.argv[0])[0] $ cd tmp ~/tmp$ ../test.py .. ~/tmp$ That's rather not what's intended. I'd try os.path.abspath(__file__) instead. Fair point. On Win32 sys.argv[0] always seems to give the full path rather than the relative path - hadn't realised it was different for linux (?). -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: C# and Python
On Aug 21, 11:01 am, subeen [EMAIL PROTECTED] wrote: Hi, ... But I want to write the GUI and number generation program in C#.net. When the user clicks Quick Sort button, the quicksort.py will be called and it will sort the numbers. Probably worth looking at IronPython, the Python implementation for the .Net platform. -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Python question (PyNoob)
On Aug 20, 1:33 am, Anonymous [EMAIL PROTECTED] wrote: ... 1). Data Munging (text processing) - instead of Perl Check out the re module (regexes) in the standard library, and the pyparsing third party library: http://pyparsing.wikispaces.com/ for more complex stuff. 2). Automating my build process You'll want to look into the os, sys and subprocess modules. The PMOTW this week was subprocess: http://www.oreillynet.com/onlamp/blog/2007/08/pymotw_subprocess_1.html. A few weeks back it covered os: http://blog.doughellmann.com/2007/05/pymotw-os.html. In fact one of Doug Hellmann's previous articles on the getopt module may also be useful if you want your build scripts to be controlled by command line args: http://blog.doughellmann.com/2007/08/pymotw-getopt.html (Though I prefer optparse personally). 3). (Possibly) some web data retrieval jobs urllib, urllib2 and cookielib in the standard library should do most of what you want, perhaps with the addition of beautiful soup if you need to scrape the pages for data: http://www.crummy.com/software/BeautifulSoup/ HTH. -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: creating and appending to a dictionary of a list of lists
On Aug 15, 3:30 am, [EMAIL PROTECTED] wrote:
Hey,
I started with this:
factByClass = {}
...
def update(key, *args):
x = factByClass.setdefault(key, [[], [], [], [] ])
for i, v in enumerate(args):
x[i].append(v)
Is there a better way?
Well, the following is perhaps neater:
factByClass = defaultdict(lambda: [[],[],[],[]])
def update(key, *args):
... map(list.append, factByClass[key], args)
...
update('one', 1, 2, 3, 4)
update('one', 5, 6, 7, 8)
update('two', 9, 10, 11, 12)
print factByClass
defaultdict(function lambda at 0x00F73430, {'two': [[9], [1
0], [11], [12]], 'one': [[1, 5], [2, 6], [3, 7], [4, 8]]})
It abuses the fact that list.append modifies the list in place -
normally you would use map to get a new list object. In this case the
new list returned by map is just a list of None's (since append
returns None - a common idiom for functions that operate by side
effect), and so is not used directly.
--
Ant...
http://antroy.blogspot.com/
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Re: buggie in else syntax ?
On Aug 15, 9:40 am, stef mientki [EMAIL PROTECTED] wrote: Thomas Jollans wrote: ... else: JSM(230) ; \ if b3: == SYNTAX ERROR pointing to the f of if This is equivalent to: else: JSM(230) ; if b3: If statements (any compund statements in fact such as for loops etc) *must* start on a new line (with indentation as necessary): http://docs.python.org/ref/compound.html -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: The Future of Python Threading
On Aug 11, 5:43 am, Seun Osewa [EMAIL PROTECTED] wrote: I think I've heard Guido say the last attempt at removing the Global Interpreter Lock (GIL) resulted in a Python that was much slower... What is it about Python that makes a thread-safe CPython version much slower? Why doesn'ttrue threading slow down other languages like Perl and Java? I have no idea about Perl - but there's probably some hideous black magic going on ;-) As for Java, making code thread safe *does* slow down the code. It is the very reason that the language designers made the collections API non-thread safe by default (you have to wrap the standard collections in a synchronised wrapper to make them thread safe). -- Ant... -- http://mail.python.org/mailman/listinfo/python-list
Re: py2exe with python 2.5
On Aug 10, 11:47 am, [EMAIL PROTECTED] wrote: On 10 kol, 11:02, Ant [EMAIL PROTECTED] wrote: ... yes,Python 2.5 is on the path, but how can I remove panda3d from that path? Hit Win - Break to bring up the System Properties dialog (you can also get here through the Control Panel). Go to the Advanced tab, and click the Environment Variables button. Find the PATH variable in one of the two lists, and edit it. Just remove the Panda3D entry. Note you'll have to restart your console to pick up any changes. -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Smoother Lines in Turtle Graphics
On Aug 10, 11:41 am, Diez B. Roggisch [EMAIL PROTECTED] wrote: tomy wrote: Hi All ... What turtle graphics? I'm not aware that there is some standard-turtle-graphics available, so it might be a problem of your turtle-graphics-package. Diez import turtle Its part of the standard Library! I don't know the answer to the OP's question mind you, I'd played around a little with it a while ago, but nothing more. Python: Batteries and Turtles included! -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: py2exe with python 2.5
On Aug 10, 8:39 am, [EMAIL PROTECTED] wrote: Hello, Now,I was install python 2.5 and remove python 2.4 completely.After I write: $ python mysetup.py py2exe ... import py2exe_ util ImportError: Module use of conflicts with this version of Python ...ok, I know what is a problem, I haven't remove python completely, in my computer is one more folder Panda3D-1.4.0 but when I remove it and all dll files include python24.dll, I cannot run python or make that setup. (That panda3d contain python) Regards, Vedran Sounds like your path needs setting up properly. Try typing echo %PATH % into your console window to find out if Python2.5 is in the path. If you are using the default setup, then c:\Python25 should be on the path. -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Seek the one billionth line in a file containing 3 billion lines.
On Aug 8, 11:10 am, Bruno Desthuilliers bruno.
[EMAIL PROTECTED] wrote:
Jay Loden a écrit :
(snip)
If we just want to iterate through the file one line at a time, why not
just:
count = 0
handle = open('hugelogfile.txt')
for line in handle.xreadlines():
count = count + 1
if count == '10':
#do something
for count, line in enumerate(handle):
if count == '10':
#do something
You'd get better results if the test were:
if count == 10:
Or probably even:
if count == 9:
Since the 1 billionth line will have index 9.
Cheers,
--
Ant...
http://antroy.blogspot.com/
--
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Re: regexp problem in Python
On Aug 3, 10:41 pm, Ehsan [EMAIL PROTECTED] wrote: ... what can I do? what's wrong whit this pattern? thanx for your comments Nothing. There's something wrong with the code you are using the regex with. Post it and we may be able to help. Like Lawrence has said, it's likely to be that you are using m.group(1) with your match object instead of m.group(0) - the former gets the first group (i.e. everything between the first set of parens - in your case the wmv|3gp expression), whereas the latter will return the entire match. Post your actual code, not just the regex. -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Best programs written completly in Python
On Aug 5, 12:31 pm, Campbell Barton [EMAIL PROTECTED] wrote: ... * ubuntu have some of their install tools in python. Gentoo Linux's Portage package management tool is written in Python. -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Where do they tech Python officialy ?
On Aug 1, 9:40 am, Alex Popescu [EMAIL PROTECTED] wrote: ... It depends :-). In my experience I met employers being concerned by my implication in the oss world :-). I have the opposite experience. It was predominantly the fact that I was involved in several open source projects that got me into professional development 3 years ago. The employers in the market at the time required 2 years+ of commercial experience - the fact that I was involved in OSS helped on two counts, firstly that it showed that I actually have an interest in development (rather than being another Comp Sci graduate just after a wage), and secondly that I have experience in good development practice (the open source projects I worked on had better infrastructure in place than two of the three companies I've worked for since!) -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Can python access windows clipboard
On Jun 21, 9:59 am, MaHL [EMAIL PROTECTED] wrote: Can I use python to copy something(like a string) to the clipboard, so that I can paste it somewhere else. Is there a way to do this? The following requires Mark Hammond's win32all package (http:// sourceforge.net/projects/pywin32/): import win32clipboard, win32con, random text = Some text to stick on the clipboard win32clipboard.OpenClipboard() win32clipboard.SetClipboardData(win32con.CF_TEXT, text) win32clipboard.CloseClipboard() -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: static python classes ?
It's not clear what you mean here. If you mean something like static inner classes in Java, then you can simply nest classes in Python: class A(object): ... class B(object): ... def aaa(self): ... print AA ... z = A.B() z.aaa() AA (In contrast the equivalent of Java's ordinary inner class: class A(object): ... def __init__(self): ... class B(object): ... def aa(self): ... print ... self.B = B ... A().B().aa() ) If you mean static class as in an class which only has static methods and variables, then the python equivalent is a module. I'm new to python, and I can't seem to find in the docs how to create the python equivalent of what's called in most OOP languages static classes, can you give me a hint ? Hope the above was what you are looking for. -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: MySQL - Jython2.2
On Jun 15, 3:31 pm, HMS Surprise [EMAIL PROTECTED] wrote: I thought I had a winner mySql-python but it require2 python 2.3-5 and the tool I am using (maxq) is based on jython 2.2. Is there another way that I could perform queries from python? If you want to query via Jython, use the jdbc driver from www.mysql.com, and you an then use JDBC from within Jython. You'll just need to add the mysql jdbc jar to your classpath. HTH. -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Help a C++ escapee!
Hi Simon, When run, I come unstuck here: self.clientSocket, self.clientAddress = network.accept() I get a nameError on 'network', yet it is one in the global namespace, defined in server.py before CServerThread.Listen() is called. You have imported everything from socketManager in server.py, but socketManager knows nothing about any globals defined in the server module! You'd need to import it in socketManager.py: from server import network However this may not work, since you have circular dependencies in your code - server requires socketManager and vice versa. Even if this does work it is bad practice, and is an indication that your classes are in the wrong modules, or that your classes need refactoring somewhat. A simple solution would be to pass an instance of the CNetworkManager into CServerThread. i.e. ... def Listen(self): self.threadArray =[] self.ch = 0 while self.ch self.maxClients: #Create a thread listening to each socket self.newThreadObject = CServerThread(self) self.newThreadObject.start() self. threadArray.append(self.newThreadObject) self.ch=self.ch+1 class CServerThread(threading.Thread): def __init__(self, network): self.network = network def run(self): while (1): self.clientSocket, self.clientAddress = self.network.accept() ... HTH. -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Translating some Java to Python
On May 20, 9:24 pm, Daniel Gee [EMAIL PROTECTED] wrote: ... The Java version has static methods for common roll styles (XdY and XdY +Z) for classes that just want a result but don't want to bother keeping an object around for later. So the question is, assuming that I wanted to keep the static method behavior (which I'm not really sure I do), how does one format the method header on a 'static' method in Python? Is it just something like: class Foo: def statAdd(self,a): return a+5 or do you drop the 'self' bit and just use a 1 variable parameter list? Herman has shown you *how* to do static methods in Python, but typically they are not used. Since Python has first class functions, and they can be defined at the module level, there is no need to use static methods. There is a distinction in Python not present in Java between class and static methods, class methods get the class passed in as the first parameter, and can be useful if you want a function that acts on data that the class provides. Static methods in Python are merely normal functions that are associated with the class - for conceptual reasons rather than practical ones, and are rarely used as far as I can tell. I've certainly never bothered with them. In the case of your statAdd above, self is never used in the method body, and so this is a clear indication that a module level function would be more appropriate. -- Ant... http://antroy.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
