How to check if a variable is instance of any class

Asked May 20 '14 at 15:46

Active May 20 '14 at 16:22

Viewed 60 times

I am trying to figure out the best and/or most elegant way to check if a variable is instance of any class except built-in types like int, float, tuple, dict, list, etc., that is why I cannot do something like:

>>> hasattr(some_var, '__class__')

Currently, what I am doing is the following:

>>> class DummyClass(object):
...     pass
... 
>>> my_var = DummyClass()
>>> 'class' in str(type(my_var))
True
>>> 'class' in str(type([]))
False
>>> 'class' in str(type(3.43))
False

Because it works with built-in types (returns False), but I would like to know if there is a better way to do this.

edited May 20 '14 at 15:53

asked May 20 '14 at 15:46

XNor

possible duplicate of http://stackoverflow.com/q/1322068/217324 (shows how to list the built-in types w/o hardcoding) – Nathan Hughes May 20 '14 at 15:55
2

What about classes which extend `dict`? – Aaron Digulla May 20 '14 at 15:57
@Aaron that's a good one, I didn't even think about it – XNor May 20 '14 at 16:00

How to check if a variable is instance of any class

0 Answers0