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support custom repr() callable for attributes #568

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merged 15 commits into from Sep 6, 2019
Merged

support custom repr() callable for attributes #568

merged 15 commits into from Sep 6, 2019

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wbolster
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@wbolster wbolster commented Sep 5, 2019

This adds support for using a custom callable to be used instead of the default repr() when formatting individual attributes in the generated __repr()__. The attr.ib(repr=…) argument now takes either a bool (as before), or a callable that takes a value and returns a string.

Fixes #567. Fixes #212.

@wbolster wbolster requested a review from hynek September 5, 2019 15:48
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wbolster commented Sep 5, 2019

not sure why the doctest fails. in an interactive shell it works:

>>> import attr
>>> @attr.s
... class C(object):
...     user = attr.ib()
...     password = attr.ib(repr=lambda value: '***')
... 
>>> C("me", "s3kr3t")
C(user='me', password=***)

update: oops, seem i can't even copy/paste correctly... 🙈

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hynek commented Sep 6, 2019

The doctests says ... password = attr.ib(repr=False).

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hynek commented Sep 6, 2019

@Julian is this good enough for your – I'm afraid ancient – #212?

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Julian commented Sep 6, 2019

Cool. Other than #567 (comment), seems likely... Can review the patch more carefully in a bit.

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Julian commented Sep 6, 2019

Cool! Left random comments just to help myself understand what this was doing mostly, but yeah looks like it'd indeed hit #212.

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hynek commented Sep 6, 2019

Additionally to what Julian wrote, please add an example to typing_example.py to verify typing works. Thanks!

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Almost there, but please also add an versionchanged tag to attrib, thanks!

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@wbolster wbolster self-assigned this Sep 6, 2019
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wbolster commented Sep 6, 2019

Almost there, but please also add an versionchanged tag to attrib, thanks!

sure, but what's the right value?

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hynek commented Sep 6, 2019

Almost there, but please also add an versionchanged tag to attrib, thanks!

sure, but what's the right value?

Next release is 19.2.0.

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wbolster commented Sep 6, 2019

Additionally to what Julian wrote, please add an example to typing_example.py to verify typing works. Thanks!

added in b1bd940

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wbolster commented Sep 6, 2019

ok, please review again. i think i fully addressed all comments so far.

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wbolster commented Sep 6, 2019

pr description updated as well

@wbolster wbolster changed the title wip: support custom repr() callable for attributes support custom repr() callable for attributes Sep 6, 2019
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Great, thanks everyone!

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Woohoo!

@hynek hynek merged commit 0b91364 into python-attrs:master Sep 6, 2019
@wbolster wbolster deleted the custom-attribute-repr branch September 6, 2019 12:28
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wbolster commented Sep 6, 2019

🚀 thanks all the quick turn-around

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Feature Request: Custom __repr__ for particular attribute? Allow repr (+ str?) to take callables
3 participants