Em qua, 1 de jul de 2020 00:56, David Lowry-Duda <da...@lowryduda.com>
escreveu:
> Very similar things could be said about dict.get too, no? It's easy to
> write your own function that does the same thing or to catch an
> exception.
>
> On the other hand, it seems far more likely to miss keys in a dictionary
> than it is to repeatedly mistake indices in a list.
> > Which would be the use cases for this feature?
> >
> > I can't think of one.
>
> I've never missed this feature either. But I would also be interested in
> hearing a dream use case.
>
The usecase is extracting deeply nested data from parsed json.
Missing keys are something that happens on dicts, I want something that is
able to extract data from parsed json, that eliminates the error handling
noise. All this talk elucidates me that this is possible
try:
v = foo.bar['tar'][0]['zar']
except (LookupError, AttributeError):
v = None
would suffice in all cases,
>
> - DLD
>
>
> --
> David Lowry-Duda <da...@lowryduda.com> <davidlowryduda.com>
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