On 2021-02-05 22:18, Random832 wrote:
While we're on the subject of assignment expression limitations, I've
occasionally wanted to write something like
try:
return a_dict[key]
except KeyError:
return (a_dict[key] := expression to construct value)
You can already do that with
On Sat, Feb 6, 2021 at 5:21 PM Random832 wrote:
>
> While we're on the subject of assignment expression limitations, I've
> occasionally wanted to write something like
>
> try:
> return a_dict[key]
> except KeyError:
> return (a_dict[key] := expression to construct value)
That's what
While we're on the subject of assignment expression limitations, I've
occasionally wanted to write something like
try:
return a_dict[key]
except KeyError:
return (a_dict[key] := expression to construct value)
___
Python-ideas mailing list --
On 2/5/21, Barry Scott wrote:
>> On 5 Feb 2021, at 11:06, Inada Naoki wrote:
>
>> python.exe lookup pyvenv.cfg even outside of venv.
>> So we can write utf8mode=1 in pyvenv.cfg even outside of venv.
I don't like extending "pyvenv.cfg" with generic settings. This is a
file to configure a virtual
> I'm talking about the user's override of the system default.
This is indeed a limitation, but I’m not sure that’s a bad thing. As I
think I’ve said before, utf-8 mode is probably not a feature you want
turned on for ALL instances of Python, even all instances for a single user.
So if a user
On Sat, Feb 6, 2021 at 6:08 AM Paul Sokolovsky wrote:
> And looking back now, that seems like intentionally added accidental
> gap in the language (https://en.wikipedia.org/wiki/Accidental_gap).
> Similar to artificially limiting decorator syntax, which was already
> un-limited. But seems,
Hello,
Thanks for the reply.
On Fri, 5 Feb 2021 13:32:25 -0500
Terry Reedy wrote:
> On 2/5/2021 2:51 AM, Paul Sokolovsky wrote:
>
> > https://www.python.org/dev/peps/pep-0572/
> ...
>
> ((a, b) := (1, 2))
> >File "", line 1
> > SyntaxError: cannot use assignment expressions
On Sat, Feb 6, 2021 at 12:51 AM Matt del Valle wrote:
>
> Unfortunately, [lazy importers are] fundamentally incapable of dealing with
> 'from x import y' syntax, because this is always loaded eagerly by the Python
> interpreter.
>
This is because it's fundamentally hard.
> With the
Since this hasn't actually received moderator approval yet, I'd be happy if
you declined this post and let me resubmit it without those typos, since
they actually deal with specifics of the proposal and could be confusing if
left in. I'm super sorry, my mistake!
On Fri, Feb 5, 2021 at 12:39 PM
I have seen a lot of interest in this topic, and I think the sheer number
of different lazy import implementations (generally using proxy objects for
modules and then loading them when an attribute is accessed) should present
pretty good evidence that this is a very desired feature, particularly
Whoops, sorry. I just realized that I mistyped the third paragraph from the
bottom, it should be:
> from some_library import AnotherClass # this causes * AnotherClass * to
be imported from some_library/__init__.py which in turn causes the import
statement on line 4 of some_library/__init__.py to
> On 5 Feb 2021, at 11:49, Inada Naoki wrote:
>
> On Fri, Feb 5, 2021 at 8:15 PM Barry Scott wrote:
>>
>>>
>>> The main limitation is that users can not write config file in install
>>> location when Python is installed for system, not for user.
>>
>> This is the problem that I was
On Fri, Feb 5, 2021 at 8:15 PM Barry Scott wrote:
>
> >
> > The main limitation is that users can not write config file in install
> > location when Python is installed for system, not for user.
>
> This is the problem that I was thinking about when I proposed using
> a py.ini like solution where
> On 5 Feb 2021, at 11:06, Inada Naoki wrote:
>
> On Fri, Feb 5, 2021 at 7:59 PM Barry Scott wrote:
>>
>> I'm under the impression that new users will not create a venv.
>> Indeed I run a lot of python scripts outside of venv world.
>> I only use venv as part of my development pipe lines.
On Fri, Feb 5, 2021 at 7:59 PM Barry Scott wrote:
>
> I'm under the impression that new users will not create a venv.
> Indeed I run a lot of python scripts outside of venv world.
> I only use venv as part of my development pipe lines.
>
> I not sure that a venv cfg file would not help.
> But a
> On 5 Feb 2021, at 03:11, Inada Naoki wrote:
>
> On Fri, Feb 5, 2021 at 6:17 AM Barry Scott wrote:
>>
>> Rather than reply point by point I will summarise my input.
>>
>> I think that utf-8 mode is a great idea.
>>
>> I think that an .INI file in the style that py.exe uses is better then
Hello,
Everyone knows how hard to find a compelling usecase for the assignment
expression operator (":=", colloquially "walrus operator").
https://www.python.org/dev/peps/pep-0572/ examples never felt
compelling and we all remember the split it caused.
I finally found a usecase where *not* using
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