Re: how to find out if an object is a class?

[Terry Reedy]

Wojtek Walczak wrote:
Dnia Thu, 7 Aug 2008 14:36:37 -0700 (PDT), szczepiq napisa�(a):
Pardon me for most likely a dummy question but how do I find out if an
object is a class?


Use types.ClassType:

class Q:
...    pass
...
import types
isinstance(Q, types.ClassType)
True

That is only true and only works for 2.x old-style classes and not for 
2.x new-style classes and all 3.0 classes, for which isinstance(Q,type) 
is True.

>>> class old: pass
...
>>> type(old)
<type 'classobj'>
>>> class new(object): pass
...
>>> type(new)
<type 'type'>

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