How to check whether a variable is a class or not?

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Chapters
00:00 Question
00:41 Accepted answer (Score 463)
00:57 Answer 2 (Score 62)
01:08 Answer 3 (Score 49)
01:30 Answer 4 (Score 38)
01:43 Thank you

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Full question
https://stackoverflow.com/questions/3957...

Accepted answer links:
[inspect.isclass]: https://docs.python.org/library/inspect....

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https://meta.stackexchange.com/help/lice...

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Tags
#python #reflection

#avk47

ACCEPTED ANSWER

Score 498

Even better: use the inspect.isclass function.

>>> import inspect
>>> class X(object):
...     pass
... 
>>> inspect.isclass(X)
True

>>> x = X()
>>> isinstance(x, X)
True
>>> inspect.isclass(x)
False

ANSWER 2

Score 75

>>> class X(object):
...     pass
... 
>>> type(X)
<type 'type'>
>>> isinstance(X,type)
True

ANSWER 3

Score 55

The inspect.isclass is probably the best solution, and it's really easy to see how it's actually implemented

def isclass(obj):
    """Return true if the obj is a class.

    Class objects provide these attributes:
        __doc__         documentation string
        __module__      name of module in which this class was defined"""
    return isinstance(obj, (type, types.ClassType))

ANSWER 4

Score 45

isinstance(X, type)

Return True if X is class and False if not.