On 19.05.2017 04:37, Eric V. Smith wrote:
On 5/18/17 2:26 PM, Sven R. Kunze wrote:
On 17.05.2017 23:29, Ivan Levkivskyi wrote:
the idea is to write it into a PEP and consider API/corner
cases/implementation/etc.
Who's writing it?
Guido, Hynek, and I met today. I'm writing up our notes, and
Could you point me to this 4-point list of Stephan's? I couldn't find
anything in the archive that you might be referring to.
Never mind, I found them here:
https://mail.python.org/pipermail/python-ideas/2017-May/045679.html
Eric.
___
Python-ideas ma
On 05/17/2017 07:55 PM,
[email protected] wrote:
Top posting, apologies.
I'm sure there is a better way to do it, and there is a performance hit, but
its negligible. This is also a three line delta of the function.
from fnmatch import _compile_pattern, filter as old_filter
import os
impo
Exactly this.
On 19.05.2017 14:42, Eric V. Smith wrote:
Could you point me to this 4-point list of Stephan's? I couldn't find
anything in the archive that you might be referring to.
Never mind, I found them here:
https://mail.python.org/pipermail/python-ideas/2017-May/045679.html
Eric.
> -Original Message-
> From: Python-ideas [mailto:python-ideas-bounces+tritium-
> [email protected]] On Behalf Of Wolfgang Maier
> Sent: Friday, May 19, 2017 10:03 AM
> To: [email protected]
> Subject: Re: [Python-ideas] fnmatch.filter_false
>
> On 05/17/2017 07:55 PM,
> t
For people who don't want to click on links:
1. Allow hash and equality to be based on object identity, rather than
structural identity,
this is very important if one wants to store un-hashable objects in
the instance.
(In my case: mostly dict's and numpy arrays).
2. Not subclassed from tupl
Let me quote the attrs docs:
""
convert (callable) – callable() that is called by attrs-generated __init__
methods to convert attribute’s value to the desired format. It is given the
passed-in value, and the returned value will be used as the new value of
the attribute. The value is converted befo
So it is only called by __init__ and not by __setattr__?
On Fri, May 19, 2017 at 11:32 AM, Stephan Houben
wrote:
> Let me quote the attrs docs:
>
> ""
> convert (callable) – callable() that is called by attrs-generated __init__
> methods to convert attribute’s value to the desired format. It is
Hi Guido,
Yes indeed, *only* invoked by __init__ .
See my test below.
=
import attr
@attr.s
class Foo:
x = attr.ib(convert=str)
foo = Foo(42)
print(repr(foo.x))
# prints '42'
foo.x = 42
print(repr(foo.x))
# prints 42
==
Not sure if this is a good design but it matches the docs.
St
Hello,
I'm an attrs contributor so maybe I can clear up any questions.
Convert callables are only called in __init__, not in the setters. We've
had this requested a number of times and we will almost certainly support
it in the future, probably on an opt-in basis.
The reason we don't currently s
Just one additional word about mixins:
we've been inspired by Django's extensive usage of mixins for their
class-based views, forms and model classes. For one, we defined more
mixins for those classes (like UrlMixin for view classes), and for
another we developed our own mixin infrastructure f
On Fri, May 19, 2017 at 11:24:53AM -0700, Guido van Rossum wrote:
> 4. Easily allow to specify a conversion function. For example I have
> some code like below:
> note that I can store a numpy array while keeping hashability and
> I can make it convert
>to a numpy array in the constructor.
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