Traversing Inheritance Model

[Ziga Seilnacht]

digitalorganics at gmail.com wrote:
> What's the best way to traverse the web of inheritance? I want to take
> a class and traverse its bases and then the bases' bases etc....
> looking for a particular class. What first came to mind was nested for
> loops. However, I want to know if there's some pre-existing method for
> doing this or if this isn't even possible (might send me in circles
> perhaps?).Thanks all.

The __mro__ descriptor does what you want. Example:

>>> class A(object):
...     pass
...
>>> class B(object):
...     pass
...
>>> class C(A, B):
...     pass
...
>>> C.__mro__
(<class '__main__.C'>, <class '__main__.A'>, <class '__main__.B'>,
<type 'object'>)

See:
http://www.python.org/download/releases/2.2.3/descrintro/
and
http://www.python.org/download/releases/2.3/mro/
for details.

Ziga