pdb plus plus: https://pypi.python.org/pypi/pdbpp
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There is a trick that I use when data transfer is the performance killer. Just
save your big array first (for instance on and .hdf5 file) and send to the
workers the indices to retrieve the portion of the array you are interested in
instead of the actual subarray.
Anyway there are cases where m
Il giorno lunedì 17 luglio 2017 19:20:04 UTC+2, Steve D'Aprano ha scritto:
> collections.namedtuple generates a new class using exec, and records the
> source
> code for the class as a _source attribute.
>
> Although it has a leading underscore, it is actually a public attribute. The
> leading un
errors or strange behaviors. I am not aware of any issues, but one is
never sure with new features.
Thanks for your help,
Michele Simionato
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Thanks. I suspected the culprit was executescript, but I did not see it
documented in https://docs.python.org/3/library/sqlite3.html#connection-objects.
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erted in script1, since they are part of the
same transaction. Instead they are not removed!
Can somebody share some light on this? I discover the issue while porting some
code from PostgreSQL to sqlite3, with Postgres doing the right thing and sqlite
failing.
I am puzzled,
Michele Simionato
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I did not know about docopt. It is basically the same idea of this recipe I
wrote about 12 years ago:
https://code.activestate.com/recipes/278844-parsing-the-command-line/?in=user-1122360
Good that it was reinvented :-)
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On Sunday, May 29, 2016 at 4:42:17 PM UTC+2, Ankush Thakur wrote:
> Hello,
>
> I'm a self-taught programmer who has managed to claw his way out of Python
> basics and even covered the intermediate parts. But I feel I have a ton of
> theory in my head and would like to see some smallish applicati
On Thursday, September 3, 2015 at 6:55:06 PM UTC+2, Palpandi wrote:
> Hi All,
>
> Is there any module available in python standard library for XML binding? If
> not, any other suggestions.
>
> Which is good for parsing large file?
> 1. XML binding
> 2. Creating our own classes
>
>
> Thanks,
>
Il giorno mercoledì 13 agosto 2014 19:13:16 UTC+2, thequie...@gmail.com ha
scritto:
> What is the difference between traits and roles?
People keep using the same names to mean different concepts. For me traits are
the things described here:
http://www.iam.unibe.ch/~scg/Archive/Papers/Scha03aTra
Years ago I wrote strait: https://pypi.python.org/pypi/strait
I wonder who is using it and for what purpose, since surprisingly enough it has
50+ downloads per day. For me it was more of an experiment than a real project.
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I have a memory leak in a program using big arrays. With the goal of debugging
it I run into the memory_profiler module. Then I discovered something which is
surprising to me. Please consider the following script:
$ cat memtest.py
import gc
from memory_profiler import profile
@profile
def test
On Wednesday, April 3, 2013 3:05:31 AM UTC+2, Rotwang wrote:
> After thinking about it for a while I've come up with the following
>
> abomination
Alas, there is actually no good way to implement this feature in pure Python
without abominations. Internally the decorator module does something s
ShiningPanda looks really really cool. I need to investigate it.
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dvice is welcome!
Michele Simionato
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On Tuesday, October 9, 2012 5:24:17 PM UTC+2, Peter Otten wrote:
> Seriously, you shouldn't use the main script as a library; it is put into
>
> the sys.modules cache under the "__main__" key. Subsequent imports under its
>
> real name will not find that name in the cache and import another ins
I have the following module implementing a registry of functions with a
decorator:
$ cat x.py
registry = {} # global dictionary
def dec(func):
registry[func.__name__] = func
print registry, id(registry)
return func
if __name__ == '__main__':
import xlib
print registry, id(re
The standard is to use `cls`. In the __new__ method you can use `mcl` or `meta`.
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Python 3.2 enhanced contextlib.contextmanager so that it is possible to
use a context manager as a decorator. For instance, given the
contextmanager factory below
@contextmanager
def before_after():
print(before)
yield
print(after)
it is possibile to use it to generate decorators:
@b
This may get you started (warning: not really tested).
$ echo instr.py
from warnings import warn
oget = object.__getattribute__
tget = type.__getattribute__
class Instr(object):
class __metaclass__(type):
def __getattribute__(cls, name):
clsname = tget(cls, '__na
plac is based on argparser and it is intended to be much easier to use. See
http://plac.googlecode.com/hg/doc/plac.html
Here is an example of usage.
$ cat vcs.py
class VCS(object):
"A fictitious version control tool"
commands = ['checkout', 'commit']
def checkout(self, url):
r
Here is an example by using my own library plac
(http://pypi.python.org/pypi/plac):
class Server():
def configure_logging(self, logging_file):
pass
def check(self):
pass
def deploy(self):
pass
def configure(self):
pass
def __init__(self, hostnam
He is basically showing that using mixins for implementing logging is not such
a good idea, i.e. you can get the same effect in a better way by making use of
other Python features. I argued the same thing many times in the past. I even
wrote a module once (strait) to reimplement 99% of multiple
The fact that even experienced programmers fail to see that
super(type(self),self) in Python 2 is NOT equivalent to super()
in Python 3 is telling something.
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On Friday, May 27, 2011 10:49:52 AM UTC+2, Ben Finney wrote:
> The exquisite care that you describe programmers needing to maintain is IMO
> just as much a deterrent as the super-is-harmful essay.
Worth quoting. Also I think this article may encourage naive programmers along
the dark path of coop
Looks cool, I will have a look at it, thanks!
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Do you know if there is any converter from the Markdown syntax to the
rst syntax? Googling for markdown2rst
did not help. Thanks!
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Notice that Peter's approach also works without inheritance:
registries = {}
@property
def per_class(self):
cls = type(self)
try:
return registries[cls]
except KeyError:
result = registries[cls] = []
return result
class A(object): per_class=per_class
class B(object): p
On Jan 12, 6:09 pm, Alice Bevan–McGregor wrote:
> entirely sure what you mean by 'smart' options. If your'e referring to
> using a single hyphen and a list of characters to represent a long
> option (which, to the rest of the world, use two leading hyphens) then
> that's pretty weird. ;)
>
> One
On Jan 11, 6:57 pm, Mike wrote:
> On Jan 11, 11:26 am, Michele Simionato
> wrote:
> > In that case easy_install/pip/whatever will install the dependency
> > automatically (who is installing
> > dependencies by hand nowadays?).
>
> I do. Is this bad? :}
You are
On Jan 11, 4:06 pm, Alice Bevan–McGregor wrote:
> After looking into it, Plac's default help display isn't very helpful;
> you need to massage your application a fair amount before generating
> nice, complete-looking argument lists and such. For example:
>
> def main(verbose: ('prints mor
On Jan 11, 5:22 pm, Jean-Michel Pichavant
wrote:
> Michele Simionato wrote:
> > On Jan 11, 4:06 pm, Alice Bevan McGregor wrote:
>
> >> Plac appears (from the documentation) to be written on top of argparse.
> >> :(
>
> > And the problem with that being wh
On Jan 11, 4:06 pm, Alice Bevan–McGregor wrote:
> Plac appears (from the documentation) to be written on top of argparse.
> :(
And the problem with that being what?
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On Jan 11, 8:25 am, Alice Bevan–McGregor wrote:
explicit callbacks or typecasting functions, etc.
>
> I got tired of using PasteScript and OptParse. Mostly OptParse, actually. :/
It's a pity that the argument parsing modules in the standard library
are so verbose that everybody is reinventing
Python 3 and function annotations you
may want to try out the new decorator module (easy_install decorator)
and give me feedback.
See http://pypi.python.org/pypi/decorator for more.
Thanks for your time and Happy New Year to all fellows Pythonistas!
Michele Simionato
P.S. today I have
On Nov 29, 7:01 am, Leo Jay wrote:
> Hi all,
>
> I'd like to know how do you guys find out what's happening in your
> code if the process seems not work.
> In java, I will use jstack to check stacks of threads and lock status.
> But I don't know how to do it in python.
>
> --
> Best Regards,
> Le
techniques, so I
am not sure how much my gut feeling is sound. Apparently here at work
we are going to use Erlang in the near future and I hope to get my
hand dirty and see in practice how well one can work with a language
without inheritance. BTW, is there anybody here with experience on
such langu
you can attach properties to it. You have a good chance of not
breaking anything in doing so,
but you cannot know for sure unless you try. I don't know if Tkinter
uses features of old-style classes which are inconsistent with new-
style classes, but probably the answer is not much.
Michele Simionato
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For future googlers: it turns out in my case the call to .starttls()
was not needed: I removed it and everything worked. Dunno why I was
there in the first place, the original code was written by somebody
else.
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now of other use cases either.
Michele Simionato
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n to be debug the issue and
to figure out where the problem is?
TIA,
Michele Simionato
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On Nov 5, 5:55 pm, gb345 wrote:
> For a project I'm working on I need a way to retrieve the source
> code of dynamically generated Python functions. (These functions
> are implemented dynamically in order to simulate "partial application"
> in Python.[1]) The ultimate goal is to preserve a textu
On Nov 4, 2:19 am, braden faulkner wrote:
> I'm using a menu for my command line app using this method.
>
> choice = "foobar"
> while choice != "q":
> if choice == "c":
> temp = input("Celsius temperature:")
> print "Fahrenheit:",celsius_to_fahrenheit(temp)
> elif choice ==
On Oct 22, 10:42 pm, Felipe Bastos Nunes
wrote:
> Hi! I was looking for a good decorator library to study and make my
> own decorators. I've read the Bruce Eckel's blog at artima dot com.
> But I need some more examples. I'm building a WSN simulator like SHOX
> is in java, but programming it in py
Accepting both options and positional arguments for the same purpose
does not look like a good idea to me.
Anyway, here is a solution using plac (http://pypi.python.org/pypi/
plac) assuming you can afford an external dependency:
import plac
@plac.annotations(
personname=("person to be matched
Here is a solution using plac (http://pypi.python.org/pypi/plac) and
not OptionParse, in the case
the Linux underlying command is grep:
import subprocess
import plac
@plac.annotations(help=('show help', 'flag', 'h'))
def main(help):
if help:
script_usage = plac.parser_from(main).forma
Python. But the situation is not
different for
other languages such as Perl or Ruby. C is free from this problem
because it is a very old and stable language. There is no more content
in that post and everybody should already know such basic facts.
Michele Simionato
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On Sep 2, 1:45 pm, Neal Becker wrote:
> I'm interested in using argparse to parse a string formatted as:
>
> my_prog --option1=1,10,37
>
> That is, a list of comma delimited values. I guess nargs almost does it,
> but expects options to be space-delimited.
>
> What would be the easiest approach?
Perhaps, I should give an example of using plac.
For instance, here is how you could implement a SVN-like
tool with two commands ``checkout`` and ``commit``. The trick is to
write a class with two methods ``checkout`` and ``commit`` and an
attribute ``.commands`` listing them, and to call the clas
On Aug 31, 3:45 am, NickC wrote:
> I'm struggling to see how you could refactor the option parsing function.
> After all, it has to process the options, so it has to do all the setup
> for those options, and then process them.
Perhaps plac could simplify your life, by removing most of the
boilerp
my Emacs is set to 79 chars and longer code looks
ugly, that I look at two-side diffs all the time, and that sometimes I
want to print on paper the code I have to work with. OTOH, I do not
see a single advantage in using long lines.
Michele Simionato
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On Aug 1, 1:08 pm, News123 wrote:
> I wondered, whether there's a simple/standard way to let
> the Optionparser just ignore unknown command line switches.
>
> thanks in advance for any ideas
I will plug in my own work on plac: http://pypi.python.org/pypi/plac
Your problem would be solved as follo
On Jul 31, 5:08 am, Steven D'Aprano wrote:
> I have read Michelle Simionato's articles on super in Python.
One "l" please! I am a man! ;-)
>
> But Michelle is wrong to conclude that the problem lies with the concept
> of *superclass*. The problem lies with the idea that there is ONE
> superclass
On Jul 25, 1:11 am, Navkirat Singh wrote:
> OK I wanted zombie processes and have been able to regenerate them with
> multiprocessing. Now lets see how I can handle them.
The multiprocessing docs say:
"""
Joining zombie processes
On Unix when a process finishes but has not been joined it becom
Everything you ever wanted to know about super is collected here:
http://micheles.googlecode.com/hg/artima/python/super.pdf
M.S.
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On Jul 24, 4:42 am, Rolando Espinoza La Fuente
wrote:
> Finally everything make sense. And make think about be careful when
> doing multiple inheritance.
>
> Any thoughts?
>
> ~Rolando
I am not fond of multiple inheritance either and I wrote at length
about the dangers of it. If you do not know i
On Jul 20, 11:38 pm, "kak...@gmail.com" wrote:
> Hi to all,
> I 'm writing a linux console app with sockets. It's basically a client
> app that fires commands in a server.
> For example:
> $log user 55
> $sessions list
> $server list etc.
> What i want is, after entering some commands, to press th
or parsing XML data)
work
exactly that way. Actually one of the motivating examples for the
introduction of generators in Python was their use in flattening
data structure, i.e. exactly the pattern used by os.walk.
The message is stop thinking like in Java and start using idiomatic
Python. We are here to help.
Michele Simionato
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like such function is wrapped in Python: what are my options?
Notice that compatibility with pyreadline (which work on Windows)
would be a plus.
TIA,
Michele Simionato
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On Jul 7, 10:55 pm, Carl Banks wrote:
> On Jul 7, 1:31 am, Paul McGuire wrote:
> > I just
> > couldn't get through on the python-dev list that I couldn't just
> > upgrade my code to 2.6 and then use 2to3 to keep in step across the
> > 2-3 chasm, as this would leave behind my faithful pre-2.6 user
an *embedded* language: then thanks to macros you
could write a *compiled* sublanguage. Doing the same in Python is
essentially impossible.
Michele Simionato
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On Jun 30, 2:52 pm, Lie Ryan wrote:
> On 06/27/10 11:24, Steven D'Aprano wrote:
>
> >> > Producing print function takes a little bit more effort than producing a
> >> > print statement.
>
> > (1) The main use-cases for print are quick (and usually dirty) scripts,
> > interactive use, and as a debu
On Jun 28, 11:47 pm, rantingrick wrote:
> Give your *script* an
> enema, and do *yourself* a favor by harnessing the simplistic elegance
> of the "optphart" module instead!
>
> #-- Start Script --#
> def optphart(args):
> d = {'args':[]}
> for arg in args:
> if arg.startswith('-'):
On Jun 28, 9:56 pm, Ben Finney wrote:
> Michele Simionato writes:
> > optparse is so old-fashioned. Use plac!
>
> The OP should be made aware that:
>
> * plac is a third-party library with (TTBOMK) no prospect of inclusion
> in the standard library
>
> * optparse
On Jun 28, 3:30 pm, dirknbr wrote:
> I get an int object is not callable TypeError when I execute this. But
> I don't understand why.
>
> parser = optparse.OptionParser("usage: %lines [options] arg1")
> parser.add_option("-l", "--lines", dest="lines",
> default=10, ty
On Jun 20, 8:26 pm, Andre Alexander Bell wrote:
> On 06/20/2010 11:22 AM, Michele Simionato wrote:
>
> > A few weeks ago I presented on this list my most recent effort, plac.
> > http://micheles.googlecode.com/hg/plac/doc/plac_ext.html
>
> But this one is broken. :(
Aa
On Jun 20, 12:02 pm, Andre Alexander Bell wrote:
>
> How about adding some support for internationalization of the generated
> usage output?
The usage message of plac is actually generated by the underlying
argparse library. argparse use gettext internally, so I would say the
support is already t
Python 3.1, but the new features require Python 2.5.
You can download it from PyPI ($ easy_install -U plac):
http://pypi.python.org/pypi/plac
Enjoy!
Michele Simionato
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On Jun 16, 7:25 am, John Nagle wrote:
> OK, working on this. I can make a module make itself into a
> fake class, but can't yet do it to other modules from outside.
>
> John Nagle
I think you can with something like
import module
sys.modules[module.
On Jun 16, 4:43 am, John Nagle wrote:
> Is it possible to override "__setattr__" of a module? I
> want to capture changes to global variables for debug purposes.
>
> None of the following seem to have any effect.
>
> modu.__setattr__ = myfn
>
> setattr(modu, "__setattr__", m
On Jun 8, 10:38 am, hiral wrote:
> Hi,
>
> I am using optparser to do following...
>
> Command syntax:
> myscript -o[exension] other_arguments
> where; extension can be 'exe', 'txt', 'pdf', 'ppt' etc.
>
> Now to parse this, I am doing following...
>
> parser.add_option("-oexe', dest=exe_file..
On Jun 2, 6:37 am, Michele Simionato
wrote:
> I would like to announce to the world the first public release of
> plac:
>
> http://pypi.python.org/pypi/plac
The second release is out. I have added the recognition of keyword
arguments, improved the formatting of the help message, an
On Jun 3, 12:28 pm, "Martin P. Hellwig"
wrote:
> On the other hand it might not be so bad that you don't get questions
> from users here who are unable to use a nntp reader or news to mail service.
I am unable to use a nntp reader or news to mail service. I use the
Google Groups interface and I a
On Jun 2, 6:37 am, Michele Simionato
wrote:
> With blatant immodesty, plac claims to be the easiest to use command
> line arguments parser module in the Python world
It seems I have to take that claim back. A few hours after the
announce I was pointed out to http://pypi.python.org/pypi/C
On Jun 2, 2:20 pm, Ulrich Eckhardt wrote:
> Hi!
>
> When I use help() on a function, it displays the arguments of the function,
> along with the docstring. However, when wrapping the function using
> functools.wraps it only displays the arguments that the (internal) wrapper
> function takes, which
On Jun 2, 11:01 am, Stefan Behnel wrote:
> I managed to talk a Java-drilled collegue of mine into
> writing a Python script for a little command line utility, but he needed a
> way to organise his argument extraction code when the number of arguments
> started to grow beyond two. I told him that t
On Jun 2, 10:43 am, Paul Rubin wrote:
> Tim Golden writes:
> > pattern, which provides a minimally semi-self-documenting
> > approach for positional args, but I've always found the existing
> > offerings just a little too much work to bother with.
> > I'll give plac a run and see how it behaves.
rg
$ python example.py arg1 arg2
usage: example.py [-h] arg
example.py: error: unrecognized arguments: arg2
You can find in the documentation a lot of other simple and not so
simple
examples:
http://micheles.googlecode.com/hg/plac/doc/plac.html
Enjoy!
Michele Simionato
P.S. answering an
On May 25, 2:56 pm, "kak...@gmail.com" wrote:
> Could you please provide me with a simple example how to do this with
> threads.
> I don't know where to put the cmdloop().
> Please help, i' m so confused!
> Thank you
What are you trying to do? Do you really need to use the standard
library? Likel
On May 25, 12:03 pm, Giampaolo Rodolà wrote:
> Too bad cmdloop() doesn't provide an argument to return immediately.
> Why don't you submit this patch on the bug tracker?
>
> --- Giampaolohttp://code.google.com/p/pyftpdlibhttp://code.google.com/p/psutil
Because it is not a bug, cmd was designed to
On May 25, 10:42 am, "kak...@gmail.com" wrote:
> Hi to all,
> i'm creating a command line application using asyncore and cmd. At
>
> if __name__ == '__main__':
> import socket
>
> args = sys.argv[1:]
> if not args:
> print "Usage: %s querystring" % sys.argv[0]
> sys.exi
On May 25, 9:08 am, Peter Otten <__pete...@web.de> wrote:
> But the list comprehension is already non-equivalent to the for loop as the
> loop variable isn't leaked anymore. We do have three similar constructs with
> subtle differences.
>
> I think not turning the list-comp into syntactic sugar for
On May 22, 10:49 am, Michele Simionato
wrote:
> I have finally decided to port the decorator module to Python 3.
> Changing the module was zero effort (2to3 worked) but changing the
> documentation was quite an effort, since I had to wait for docutils/
> pygements to support Pyt
On May 25, 12:47 am, Carl Banks wrote:
> The situation here is known. It can't be corrected, even in Python 3,
> without modifying iterator protocol to tie StopIteration to a specific
> iterator. This is possible and might be worth it to avoid hard-to-
> diagnose bugs but it would complicate ite
quite different from Python e.g.
the attitude towards exceptions. In theory Go should be akin to C,
but my gut feeling is that in practice programming in it should not
feel too much different from
programming in Python (but I do not have first hand experience).
Michele Simionato
--
from the building process, if any. I am not
sure of what will happen if you do not have distribute or if you have
a previous version of the module, or if you use pip or something else
(even in Python 2.X). The packaging in Python has become a real mess!
TIA for you help,
Michele Simionato
Or you copy the whole dictionary or you just copy the keys:
for k in d.keys():
...
or
for k in list(d):
...
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On May 10, 8:18 pm, a...@pythoncraft.com (Aahz) wrote:
> saying that functional features
> are "tacked on" understates the case. Consider how frequently people
> reach for list comps and gen exps. Function dispatch through dicts is
> the standard replacement for a switch statement. Lambda callba
On May 5, 8:00 am, James Mills wrote:
> On Wed, May 5, 2010 at 3:35 PM, Michele Simionato
>
> wrote:
> > I am sure it has, but I was talking about just putting in the
> > repository an index.html file and have it published, the wayI hear it
> > works in BitBucket and
On May 5, 6:39 am, James Mills wrote:
> On Wed, May 5, 2010 at 2:08 PM, Michele Simionato
>
> wrote:
> > Interesting. I tried to see if the same was true for the Wiki in
> > Google code but apparently it does not work. Does anybody here know if
> > it is possible
On May 4, 9:48 am, James Mills wrote:
> On Tue, May 4, 2010 at 5:27 PM, Michele Simionato
>
> wrote:
> > Cool, that's good to know. I am still accepting recommendations for
> > non-Python projects ;)
>
> bitbucket (1) also provide static file hosting through th
On May 4, 8:37 am, "Martin v. Loewis" wrote:
> > Do you know of recent improvements on the PyPI side about docs
> > hosting?
>
> Yes; go to your package's pkg_edit page, i.e.
>
> http://pypi.python.org/pypi?%3Aaction=pkg_edit&name=decorator
>
> and provide a zip file at Upload Documentation.
>
> R
On May 4, 8:07 am, "Martin v. Loewis" wrote:
> If it's a Python package that this documentation is about, you can host
> it on PyPI.
It must not be Python, but let's consider this case first. How does it
work? When I published
my decorator module (http://pypi.python.org/pypi/decorator) the
suppor
: it is not that annoying, but perhaps
there is already some services out there publishing Sphinx pages
directly. Do you know of any? Currently I am hosting my stuff on
Google Code but I do not see an easy way to publish the documentation
there. Any hint is appreciated.
Michele Simionato
--
http
I do not want to write two documentations for a module working both in
Python 2.X and Python 3.X.
To avoid that, I would need the ability to interpret doctests
according to the used Python version.
I mean something like that:
"""
Documentation of the module
--
Another option is to use my own decorator module (http://
pypi.python.org/pypi/decorator):
from decorator import decorator
@decorator
def d(func, *args):
print 3
return func(*args)
@d
def f(a, b):
print a + b
f(5, 7)
--
http://mail.python.org/mailman/listinfo/python-list
On Mar 25, 2:24 pm, Michele Simionato
wrote:
> On Mar 25, 1:28 pm, Ethan Furman wrote:
>
>
>
> > Michele,
>
> > Was wondering if you'd had a chance to re-post your lectures -- just did
> > a search for them and came up empty, and I would love to read them!
On Mar 25, 1:28 pm, Ethan Furman wrote:
>
> Michele,
>
> Was wondering if you'd had a chance to re-post your lectures -- just did
> a search for them and came up empty, and I would love to read them!
>
> Many thanks in advance!
Oops, I forgot! I will try to make them available soon.
--
http://ma
Wanting the same methods to be attached to different classes often is
a code smell (perhaps it is not your case and then use setattr as
others said). Perhaps you can just leave such methods outside any
class. I would suggest you to use a testing framework not based on
inheritance (i.e. use nose or
On Jan 29, 2:30 pm, andrew cooke wrote:
> Is there any way to change the name of the function in an error
> message? In the example below I'd like the error to refer to bar(),
> for example (the motivation is related function decorators - I'd like
> the wrapper function to give the same name)
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