Traversing Inheritance Model

[digitalorganics@gmail.com]

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?).Thank s all.

[Ziga Seilnacht]

Re: Traversing Inheritance Model

digitalorganics @gmail.com wrote:[color=blue]
> 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?).Thank s all.[/color]

The __mro__ descriptor does what you want. Example:
[color=blue][color=green][color=darkred]
>>> class A(object):[/color][/color][/color]
.... pass
....[color=blue][color=green][color=darkred]
>>> class B(object):[/color][/color][/color]
.... pass
....[color=blue][color=green][color=darkred]
>>> class C(A, B):[/color][/color][/color]
.... pass
....[color=blue][color=green][color=darkred]
>>> C.__mro__[/color][/color][/color]
(<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