uld do...
int session = Py_Initialize()
Py_Finalize(session)
But obviously, CPython is not coded that way so it is not supported.
Thanks,
~Eric
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ource. If the numbers aren't out there, what would some
good approaches to discovering them? Thanks!
-eric
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On Sat, Feb 11, 2012 at 2:51 PM, Andrew Berg wrote:
> On 2/11/2012 3:02 PM, Eric Snow wrote:
>> I'm thinking about this partly because of the discussion on
>> python-ideas about the perceived challenges of Unicode in Python 3.
>
>> For instance, if frameworks
On Sat, Feb 11, 2012 at 6:28 PM, Chris Angelico wrote:
> On Sun, Feb 12, 2012 at 12:21 PM, Eric Snow
> wrote:
>> However, in at
>> least one current thread (on python-ideas) and at a variety of times
>> in the past, _some_ people have found Unicode in Python 3 to m
e numbers would be
a valuable resource. If the numbers aren't out there, what would some
good approaches to discovering them? Thanks!
-eric
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Below is some pretty simple code and the resulting output.
Sometimes the code runs through but sometimes it just freezes for no
apparent reason.
The output pasted is where it just got frozen on me.
It called start() on the 2nd worker but the 2nd worker never seemed to
enter the run method.
###
I can sill get it to freeze and nothing is printed out from the other
except block.
Does it look like I'm doing anything wrong here?
On Thu, Feb 23, 2012 at 3:42 PM, MRAB wrote:
> On 23/02/2012 17:59, Eric Frederich wrote:
>
>> Below is some pretty simple code and the
ning Worker 2
2
9
20
35
54
77
104
135
170
209
252
299
350
405
464
527
594
665
Traceback (most recent call last):
File "./multi.py", line 53, in
print result_queue.get()
File
"/home/frede00e/software/python/lib/python2.7/multiprocessing/queues.py",
line 91, in get
res =
27/02/2012 16:57, Eric Frederich wrote:
>
>> Still freezing sometimes, like 1 out of 10 times that I run it.
>> Here is updated code and a couple of outputs.
>>
>> [snip]
> I don't know what the problem is. All I can suggest is a slightly
> modified version.
&
up.
Regardless, you could also implement __call__() on a function
look-alike class to get what you're after. It may not be as
performant though.
-eric
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can I get at the traceback
text?
Thanks,
~Eric
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2012 at 1:15 AM, Stefan Behnel wrote:
> Eric Frederich, 16.04.2012 20:14:
> > I embed Python in a 3rd party application.
> > I need to use their conventions for errors.
> >
> > Looking here...
> > http://docs.python.org/extending/embedding.html#pure-embeddin
ferably only
> one --obvious way to do it'?
importlib.import_module() is the preferred approach. It's API has no
direct analog in the imp module, and is easier to use. As of 3.3,
importlib is used as the default import implementation for the
interpreter. The imp module is quickly beco
trange.
>
> I'd like something like this:
> print "{solo} was captured by {jabba}".format(locals()) # WRONG!
>
> But it doesn't work.
>
> Do you have any idea?
>
You were close:
print "{solo} was captured by {jabba}".format(**locals())
This will turn l
, or am I "stuck"
with the metaclass/class decorator route? (It's not all that bad :)
Thanks!
-eric
p.s. Am I missing something or can you really not change the docstring
of a class? I was thinking about the idea of inheriting class
docstrings too.
[1]
http://code.activest
On Thu, Jun 9, 2011 at 12:37 AM, Ben Finney wrote:
> Eric Snow writes:
>
>> p.s. Am I missing something or can you really not change the docstring
>> of a class? I was thinking about the idea of inheriting class
>> docstrings too.
>
> The docstring of an object
ven a method that doesn't
> have a docstring of its own.
>
Auto inheriting docstrings would be nice, in some cases. WRT help(),
keep in mind that docstrings are used for a bunch of other things,
like doctests and some DSLs.
-eric
> Unfortunately, since unbound methods were ditched,
>
On Thu, Jun 9, 2011 at 10:10 AM, Ethan Furman wrote:
> Eric Snow wrote:
>>
>> p.s. Am I missing something or can you really not change the docstring
>> of a class? I was thinking about the idea of inheriting class
>
up the inheritance hierarchy
>> when given a method that doesn't have a docstring of its own.
>
> Since the docstrings are useful in more places than just ‘help’, I'm +1
> on having docstrings be automatically inherited if not specified.
>
> Would the OP like to propose th
-cased to be
worth the trouble. I can just use a metaclass or class decorator that
does that, and override builtin.__build__class__ to force its use
everywhere; or use one base class for all my classes that uses the
metaclass. But it would be nice to have implicit support.
-eric
>
> Carl Banks
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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to say
don't do it. With your idea you easily, clearly, and explicitly
indicate that you want the inheritance activated. That would work for
me.
-eric
> --
> Terry Jan Reedy
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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On Fri, Jun 10, 2011 at 5:05 AM, Tim Chase
wrote:
> On 06/09/2011 01:22 AM, Eric Snow wrote:
>>
>> Sometimes when using class inheritance, I want the overriding methods
>> of the subclass to get the docstring of the matching method in the
>> base class. You can do this
n-empty
> docstring.
>
>
Yeah, the idea of an empty docstring to trigger docstring inheritance
really appeals to me. Nice example. Incidently, aren't metaclasses
always inherited, as opposed to class decorators (which are never)?
-eric
>
> def InheritableDocstring(name, bases
FYI, I started this topic up on python-ideas, as it seemed valid
enough from the responses I've gotten here [1].
-eric
[1] http://mail.python.org/pipermail/python-ideas/2011-June/010473.html
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n the instance.
You are right about a custom descriptor.
-eric
>>>> class DocDescriptor(object):
> ... def __get__(self, instance, owner):
> ... return getattr(owner, "_mydoc", None)
> ...
>>>> class Meta(type):
> ... def __init__(cls, name, b
On Thu, Jun 9, 2011 at 12:22 AM, Eric Snow wrote:
> Sometimes when using class inheritance, I want the overriding methods
> of the subclass to get the docstring of the matching method in the
> base class. You can do this with decorators (after the class
> definition), with class dec
ame__ == "__main__":
name = util.get_module_name(sys.modules[__name__])
module = importlib.import_module(name)
sys.modules[__name__] = module
break
# do my normal stuff at 0 indentation level
So, any thoughts? Thanks.
-eric
p.s. I might just handle this with
nsidering that other complex statements have special flow control
statements, I don't see why modules shouldn't either.
-eric
[1] During import the module gets compiled and the result is exec'ed
in the context of the __dict__ of a new ModuleType object. That
module object is
7;t
really seen real code like it either.
Like I said, my main motivation is to reduce my levels of indentation
somewhat. I was trying to see if I could apply a pattern I use in
functions and loops to modules. Things like "I have never seen..."
are really helpful to hear, by the way, s
This module could also include a few
lines to register a particular PathFormat depending on the platform
determined through sys.platform or whatever.
This way your path class doesn't have to try to worry about the
conversion to and from the canonical path format.
-eric
>
> --
> Steven
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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ss
that using "method" in those two attribute names should change? My
gut says yes to the first and no to the second, but I want to hear
what you think!
-eric
p.s. Sorry for the length of this message. Not only do I get
long-winded every once in a while but I wanted to give this a
t
a "break" in execution. Basically
execution of the current frame stops and returns; loop bodies aren't
handled in their own execution frames but effectively it's the same
idea.
So, a little namespace collision between us there on the words break
and return. Regardless, for the
eshed on the name when the merits of "breaking"
out of a module's execution haven't been established, but what's the
point.
-eric
>>>> def f():
> yield 1
> yield 2
> yield 3
>
>
>>>> a=f()
>>>> a
>
machinery behind language features like imports
are moving to pure Python.
So, which are the other pieces of Python that really need the heavy
optimization and which are those that don't? Thanks.
-eric
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that Python has it wrong.
On the contrary, I typically start by assuming that Python has it
right and then try to figure out what I am missing. Such is the case
here.
-eric
[1] http://mail.python.org/pipermail/python-list/2011-June/1274555.html
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is available in
2.7/3.2. A backport is available on PyPI.
module = importlib.import_module("js")
-eric
> First, I install "js.jquery"
>
> $ pip install js.jquery
>
> Here, I would like import "js" module.
>
>>>> import imp
early indicated. Are there other motivations behind code
objects that I am missing? Am I wrong about the optimization
expectation?
Thoughts?
-eric
[1] http://bugs.python.org/issue12374
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On Sat, Jul 9, 2011 at 4:41 PM, Ben Finney wrote:
> Eric Snow writes:
>
>> A tracker issue [1] recently got me thinking about what makes
>> functions special.
>
> As you describe, functions are special for your scenario because a
> function definition needs to resu
On Sat, Jul 9, 2011 at 6:21 PM, Terry Reedy wrote:
> On 7/9/2011 2:28 PM, Eric Snow wrote:
>>
>> A tracker issue [1] recently got me thinking about what makes
>> functions special. The discussion there was regarding the distinction
>> between compile time (generatio
On Sat, Jul 9, 2011 at 6:38 PM, Ben Finney wrote:
> Eric Snow writes:
>
>> On Sat, Jul 9, 2011 at 4:41 PM, Ben Finney
>> wrote:
>> > Eric Snow writes:
>> >> No other objects have code objects. No other objects in Python have
>> >> this spe
On Sat, Jul 9, 2011 at 7:34 PM, Steven D'Aprano
wrote:
> Eric Snow wrote:
>
>> Mostly I am just
>> trying to put together more pieces of the Python puzzle. In this case
>> I was trying to find out if the optimized execution of code objects
>> for functions i
Shell scripts are ones that I do all the time, sometimes in BASH
sometimes in python + system calls. A lot of the mainly for
post-install setups of Ubuntu / Fedora / Arch trying to take some of
the load off of my hands in a way that I actually know what is going
on behind the scenes. But I'll defin
r
mentoring people that want to get started at contributing to Python:
[email protected].
This a wonderful community and I hope you find the opportunity to jump right in!
-eric
> --
> Namashivaya,
> R.Shankarraman,
> Computer Science and Engineering,
> Amrita
oved platform over
> several years ago.
>
Incidently, Mark Ramm of TurboGears fame went to work at SF and they
have relatively recently moved a large chunk of their stuff to
Python[1].
-eric
[1]
http://blip.tv/pycon-us-videos-2009-2010-2011/pycon-2011-scaling-python-past-100-4899197
--
http:/
hat Missing should not be
re-bound...
I might have said to use NotImplemented instead of None, but it can be
re-bound and the name isn't as helpful for your use case.
Another solution, perhaps ugly or confusing, is to use something like
two underscores as the name for your sentinel:
mean([1, 2, __, 3])
Still it seems like using Missing (or whatever) would be better than None.
-eric
>
> --
> Steven
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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unctions. However, judging by similar
questions found while researching this, I'm not holding my breath.
Any ideas?
-eric
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the same time it shouldn't be anything that
> places a burden on the community (otherwise the hundredth student would be
> abused and the thousandth murdered).
> So I wondered if anyone had any good ideas.
While not as "community" as the mailing lists, perhaps they could post
a
are__()
(F) through inspect.currentframe().f_code.co_name
Name available on object as __name__:
(M) yes
(C) yes
(F) yes
Corrections, additions, and comment are welcome.
-eric
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On Fri, Aug 5, 2011 at 8:36 AM, Steven D'Aprano
wrote:
> Eric Snow wrote:
>
>> In Python, three types of objects have special syntax and mechanics
>> for their instantiation, during which a code object is generated:
>> modules, classes, and functions.
>
>
On Fri, Aug 5, 2011 at 11:29 AM, Steven D'Aprano
wrote:
> Eric Snow wrote:
>
>> On Fri, Aug 5, 2011 at 8:36 AM, Steven D'Aprano
>> wrote:
>>> Eric Snow wrote:
>>>
>>>> In Python, three types of objects have special syntax and mechanics
&
options? Or maybe I did something wrong and it should work as
I expected?
-eric
[1] http://hg.python.org/cpython/file/default/Objects/typeobject.c#l244
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On Sat, Aug 6, 2011 at 10:47 PM, Steven D'Aprano
wrote:
> Eric Snow wrote:
>
>> Thought I knew how to provide a dynamic __name__ on instances of a
>> class. My first try was to use a non-data descriptor:
>
> Perhaps you should explain what you are trying to do. If
0
Python syntax supports implicitly building docstrings only for
modules, class definitions, and function definitions.
-eric
>
> class Test (object):
> '''classx'''
>
> fred = 10
> '''attribute'''
>
> print
ful to me.
They do show up in help(), but not as some sort of data-attribute docstring.
-eric
>
>
>
> --
> Steven
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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metaclass=XMeta):
"Do your stuff."
They you would put your descriptor hacking in XMeta and still take
advantage of the original metaclass.
-eric
>
> Michael Foord
> --
> http://voidspace.org.uk/
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>
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On Wed, Aug 10, 2011 at 8:48 AM, Fuzzyman wrote:
> On Aug 7, 4:06 am, Eric Snow wrote:
>> Thought I knew how to provide a dynamic __name__ on instances of a
>> class. My first try was to use a non-data descriptor:
>>
>> # module base.py
>>
>> class _Name
', 'args', 'kwargs', 'b', 'c')
While there are several differences, the one I care about is co_name.
For 2.7 it's what I would expect. However, for 3.3 it's not[2][3].
It is actually nicer for my application this way, but I want to verify
the situa
__ instead? object, the base class of
HistoryKeeper, does not have a __setitem__ method, hence the
AttributeError. super() is a proxy for the next class in the MRO,
typically the base class of your class.
Keep in mind that is equivalent to
. However,
is equivalent to .
see:
http://docs.python
by copying files from one system to another? If so, does such
a "no-install" distribution already exist? If not, what are the
minimum set of Python 3.x files from a standard Windows Python
installation required for proper/normal operation?
Thanks,
Eric.
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On Aug 23, 9:31 am, Redcat wrote:
> I haven't tried it myself yet, but mighthttp://www.portablepython.com/
> be what you're looking for?
Almost except it contains additional Python packages that I'm not
interested in.
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On Aug 23, 1:52 pm, Stephen Hansen wrote:
> On 8/23/11 8:29 AM, Eric Lemings wrote:
>
> > I would like to create/find a Python 3.x distribution that can be
> > redeployed simply by copying a directory of required files; i.e.
>
> Just take the default installer, instal
emistry set - "what happens
> if I mix a little of everything together?"...
First thing that comes to mind is calling a base class's
implementation of a method:
class X(Y):
def __init__(self, value):
Y.__init__(self)
self.value = value
-eric
>
> ChrisA
&
n:
http://mail.python.org/pipermail/python-list/1999-June/616160.html
(from http://www.wefearchange.org/2010/06/import-this-and-zen-of-python.html)
-eric
> Thank You,
> Joseph Armbruster
>
> --
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>
>
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-ext/issues/list
Basically it's adding an extensions framework to the stdlib unittest
module. I'm sure Michael Foord wouldn't mind the help. Like I said,
a very interesting project, though not directly related to
accessibility or security.
-eric
>
> --
>
> Take car
ed.
I need to embed python in an application that needs to do some cleanup
at the end so I need that code to execute.
What am I doing wrong?
Is there something else I should call besides "exit()" from within the
interpreter?
Is there something other than Py_Main that I should be calling?
Thanks,
~Eric
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to pass a value back from the interpreter via sys.exit.
Thanks,
~Eric
On Fri, Mar 25, 2011 at 12:02 PM, Eric Frederich
wrote:
> I am able to embed the interactive Python interpreter in my C program
> except that when the interpreter exits, my entire program exits.
>
> #include
>
Added a fflush(stdout) after each printf and, as I expectedstill
only the first 2 prints.
On Fri, Mar 25, 2011 at 1:47 PM, MRAB wrote:
> On 25/03/2011 17:37, Eric Frederich wrote:
>>
>> So I found that if I type ctrl-d then the other lines will print.
>>
>>
This is behavior contradicts the documentation which says the value
passed to sys.exit will be returned from Py_Main.
Py_Main doesn't return anything, it just exits.
This is a bug.
On Sun, Mar 27, 2011 at 3:10 AM, Mark Hammond wrote:
> On 26/03/2011 4:37 AM, Eric Frederich wrote:
>
ot; or "sys.exit(123)".
I cannot call any of my C cleanup code because of this.
On Sun, Mar 27, 2011 at 1:55 PM, Jerry Hill wrote:
> On Sun, Mar 27, 2011 at 9:33 AM, Eric Frederich
> wrote:
>> This is behavior contradicts the documentation which says the value
>>
:
> On Friday, March 25, 2011 12:02:16 PM UTC-4, Eric Frederich wrote:
>>
>> Is there something else I should call besides "exit()" from within the
>> interpreter?
>> Is there something other than Py_Main that I should be calling?
>
> Does PyRun_Interactive
n.org/library/stdtypes.html#truth-value-testing>-eric
2011/4/6 Νικόλαος Κούρας
> >>> mail = None
> >>> mail = mail or 7
> >>> mail
> 7
>
> >>> mail = None
> >>> mail = 7 or mail
> >>> mail
> 7
>
> Here
On Fri, Apr 8, 2011 at 11:13 PM, Jon Dowdall
wrote:
> Hi All,
>
> Sorry for the blatant advertising but hope some of you may be interested
> to know that I've created an iPad application containing the python
> interpreter and a simple execution environment. It's available in iTunes
> at http://it
On Fri, Apr 8, 2011 at 11:13 PM, Jon Dowdall
wrote:
> Hi All,
>
> Sorry for the blatant advertising but hope some of you may be interested
> to know that I've created an iPad application containing the python
> interpreter and a simple execution environment. It's available in iTunes
> at http://it
class InnerSubclass(Inner):
nonlocal Inner
class Worker(Inner.Worker):
pass
return Outer
That would pull Inner into the namespace of InnerSubclass, allowing Worker
to use it in the bases declaration.
If you really want to get crazy, I suppose you could do so metaclass
hackery...
-eric
> Thanks,
>
>
> *larry*
> **
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
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love to see an index like this in PEP 1, but it may not be
practical, as the topics in the index can grow pretty dynamically. Maybe a
snapshot of the wiki content could be added to PEP 1? Or maybe just a link
there to the wiki page? Regardless, I hope everyone finds a topical PEP
inde
Hello,
I have a python installation that I built myself using Visual Studio 2005.
I need this version because I need to link Python bindings to a 3rd
party library that uses VS 2005.
I want to get setuptools installed to this Python installation but the
installer won't find my version of Python e
his file would the socket
library then be built into the main dll file?
I'm not sure exactly how to use this config.c file.
Thanks,
~Eric
On Mon, Apr 18, 2011 at 2:30 PM, Wolfgang Rohdewald
wrote:
> On Montag 18 April 2011, Eric Frederich wrote:
>> File "F:\My_Python27\lib\s
lease?
Thanks,
~Eric
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not clear:
1. Why is NaN not an exception? (not "why not change it to one?" Changing
it now would probably break stuff.)
2. What are the use cases for NaN? Looks like it gets used a lot as a
numeric (float?) object with non-value.
Any clarification would be really helpful. Tha
On Thu, Apr 28, 2011 at 11:01 AM, Chris Rebert wrote:
> On Thu, Apr 28, 2011 at 9:21 AM, Eric Snow
> wrote:
> > There's a big discussion going on at python-dev and python-ideas about
> NaN
> > (not-a-number, from IEEE 754). I haven't really gotten into any
> s
But generally that would help bridge the inheritance gap for
isinstance cases.
-eric
p.s. I would have commented on the recipe but could not log in...
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list
empty (length 0) or is the boolean version false? Again, for lists these
are the same. For list-like classes they are not necessarily the same.
Incidently, you can also check "if li == []:". This will let the __eq__
operator jump in.
-eric
[1] http://docs.python.org/dev/py3k/re
at I needed to
look it up. I do know that the builtin list has a __eq__ method and a
__len__ method, but not a __bool__ method (which it doesn't need [3]).
-eric
[1]
http://docs.python.org/dev/py3k/reference/compound_stmts.html#the-if-statement
[2]
http://docs.python.org/dev/py3k/referen
ny of the builtin
types have custom special methods for a variety of operators, including
comparison.
Looking over the documentation, it seems like it could be touched up to
alleviate any confusion. Perhaps rewording to make it clear that the
described behavior is the default for objects,
t color_list
>print x + "\n"
>
> color_list.append(x) # append last color left in x (no sc at end of
> string)
> print color_list
>
> print "done"
> --
> http://mail.python.org/mailman/listinfo/python-list
>
Try the following:
color_list = x.split(&
I have written some code using Python 2.7 but I'd like these scripts
to be able to run on Red Hat 5's 2.4.3 version of Python which doesn't
have multiprocessing.
I can try to import multiprocessing and set a flag as to whether it is
available. Then I can create a Queue.Queue instead of a
multiproc
es transition the remaining ones
have less reason to stay on Python 2. The anticipation was to see everyone
on Python 3 by 5 years after its release. It was released just over 2.5
years ago.
Here are some references that you might find helpful:
http://wiki.python.org/moin/Python2orPython3
http:
that
programmatically.
Does anyone know a better way to do ABC validation at definition time?
Thanks.
-eric
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However, they mostly
seem like overkill to me. I have included them below. If anyone has ideas
on how to approach the problem of using an ABC but satisfying it with
instance names, I would love to hear it. Thanks!
-eric
[1] In this case it would be nice to know at definition time that the c
On Thu, May 19, 2011 at 11:33 PM, Eric Snow wrote:
> Thinking about class APIs and validating a class against an API. The abc
> module provides the tools to do some of this. One thing I realized, that I
> hadn't noticed before, is that the abstractness of a class is measured when
On Fri, May 20, 2011 at 4:55 PM, Eric Snow wrote:
>
> I have revised this and made a recipe for it:
>
>
> http://code.activestate.com/recipes/577711-validating-classes-and-objects-against-an-abstract/
>
>
I also added this:
http://code.activestate.com/recipes/577712-add
it has its place).
Personally, I find super to make maintenance and refactoring easier, since I
don't have to fiddle with the base class name, or with passing self.
Cheers,
-eric
> http://fuhm.net/super-harmful/
>
> Cheers,
> Ian
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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;def last_item(self):
>return list.last_item(self) + 1
>
>
> I was thrilled to learn a new trick, popping keyword arguments before
> calling super, and wondered why I hadn't thought of that myself. How on
> earth did I fail to realise that a kwarg dict was mut
there a good way to tell the
difference, or would it be good practice to always handle explicitly in a
function any exception type that you may be raising there?
Thanks,
-eric
[1]
http://hg.python.org/cpython/file/29e08a98281d/Lib/collections/abc.py#l398
[2] http://bugs.python.org/issue8729
[
On Tue, May 31, 2011 at 3:46 PM, Eric Snow wrote:
> Looking at the ABC code [1], I noticed that Mapping's __eq__ method can
> return NotImplemented. This got me curious as to why you would return
> NotImplemented and not raise a TypeError or a NotImplementedError.
>
>
On Tue, May 31, 2011 at 4:18 PM, Ethan Furman wrote:
> Eric Snow wrote:
>
>> Looking at the ABC code [1], I noticed that Mapping's __eq__ method can
>> return NotImplemented. This got me curious as to why you would return
>> NotImplemented and not raise a TypeE
On Tue, May 31, 2011 at 6:30 PM, Ethan Furman wrote:
> Eric Snow wrote:
>
>> Guido indicates earlier in the thread that NotImplemented is used so that
>> you know that it came from the function that you directly called, and not
>> from another call inside that function.
On Sat, Jan 27, 2018 at 2:02 PM, Barry Warsaw wrote:
> please welcome your next release manager…
>
> Łukasz Langa!
Congrats, Łukasz! (or condolences? )
-eric
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Oh, man, it has been a while. The last one I remember is PEP 404 (if you
can find it :) ), dated 2011 and it wasn't an April Fool's...
On Sat, Apr 1, 2023 at 11:23 AM Skip Montanaro
wrote:
> Just wanted to throw this out there... I lament the loss of waking up on
> April 1st to see a creative A
Hi Pythoners
I need help in understanding hoe to put up the code to the following command
- Create a constructor that takes in an integer and assigns this to a
`balance` property
Regards,
Eric Kago
+254(0)714249373
Nairobi
Kenya
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