Class example:
class Cls1:
a=10
b=20
Expected output:
{a:10, b:20}
Note: I can instantiate the class and use vars function to get the above output. But I need to see the class variable values without instantiating the class.
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`vars(Cls1)`, and filter out the dunderscore values…? – deceze Feb 13 '20 at 12:42
2 Answers
4
Try Cls1.__dict__ or vars(Cls1)
You can separate them with __
>>> {k: v for k, v in vars(Cls1).items() if not k.startswith("__")}
{'a': 10, 'b': 20}
Mohammad Jafari
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They're class attributes, not instance attributes.
>>> Cls1.a
10
>>> Cls1.b
20
Classes have other attributes besides the ones you define explicitly, so vars(Cls1) will give you a lot of stuff you don't want. Best to be explicit:
>>> {k: v for k, v in vars(Cls1).items() if k in ['a', 'b']}
{'a': 10, 'b': 20}
or
>>> {k: getattr(Cls1, k) for k in ['a', 'b']}
Classes aren't supposed to be used as containers. If you want a container, use a dict in the first place.
chepner
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@variable You can't really do that, because you'd have a bunch of stuff you need to filter out. *Why* do you need to extract the class variables like this? – chepner Feb 13 '20 at 12:43
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But using container like dict wont give me an autocomplete feature. Is there an alternative? – variable Feb 13 '20 at 12:54
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1Autocompletion should not be what you design your code around. Use a `dict`. – chepner Feb 13 '20 at 12:55
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1Whatever is doing your autocompletion may eventually take type hints into account; see [`typing.TypedDict`](https://docs.python.org/3/library/typing.html#typing.TypedDict) to predefine what keys the dict should have. – chepner Feb 13 '20 at 12:56