[Python-Dev] Docstrings on builtins
bussonniermatthias at gmail.com
Mon Jun 4 21:21:02 EDT 2018
On Mon, 4 Jun 2018 at 17:29, Ivan Pozdeev via Python-Dev <
python-dev at python.org> wrote:
> On 05.06.2018 3:09, Matthias Bussonnier wrote:
> This may even be a bug/feature of IPython,
> I see that inspect.signature(timedelta) fails, so if timedelta? says
> Init signature: timedelta(self, /, *args, **kwargs)
> Then this may be some IPython internal logic. The timedelta class seem to
> use __new__ instead of __init__ (not sure why)
> Because it's an immutable type.
Ah, yes, thanks.
> and __new__ have a meaningful signature,
> So maybe we should fallback on that during signature inspection.
> According to
> there are no reliable tests for mutability.
Sure, but we can test if the signature of __init__ is (self,/, *args,
**kwargs), and if it is, it is useless we can attempt to get the signature
from __new__ and show that instead. We do similar things for docstrings,
if __init__ have no docstring we look at the class level docstring.
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