<s>[INST] How to check whether a variable is a class or not? I was wondering how to check whether a variable is a class (not an instance!) or not.
I've tried to use the function isinstance(object, class_or_type_or_tuple) to do this, but I don't know what type would a class will have.
For example, in the following code
class Foo: pass  
isinstance(Foo, **???**) # i want to make this return True.

I tried to substitute  "class" with ???, but I realized that class is a keyword in python.
 [/INST] Even better: use the inspect.isclass function.
>>> import inspect
>>> class X(object):
...     pass
... 
>>> inspect.isclass(X)
True

>>> x = X()
>>> isinstance(x, X)
True
>>> y = 25
>>> isinstance(y, X)
False

 </s>