Is there way to determine which class a method is bound to?

[Peter Otten]

Victor Ng wrote:

> I'm doing some evil things in Python and I would find it useful to
> determine which class a method is bound to when I'm given a method
> pointer.
> 
> For example:
> 
> class Foo(object):
>     def somemeth(self):
>         return 42
> 
> class Bar(Foo):
>     def othermethod(self):
>         return 42
> 
> 
> Is there some way I can have something like :
>   
>    findClass(Bar.somemeth)
> 
> that would return the 'Foo' class, and
> 
>    findClass(Bar.othermethod)
> 
> would return the 'Bar' class?
> 
> vic

>>> import inspect
>>> class Foo(object):
...     def foo(self): pass
...
>>> class Bar(Foo):
...     def bar(self): pass
...
>>> def get_imp_class(method):
...     return [t for t in inspect.classify_class_attrs(method.im_class) if
t[-1] is method.im_func][0][2]
...
>>> [get_imp_class(m) for m in [Bar().foo, Bar().bar, Bar.foo, Bar.bar]]
[<class '__main__.Foo'>, <class '__main__.Bar'>, <class '__main__.Foo'>,
<class '__main__.Bar'>]

but with this approach you will get into trouble as soon as you are using
the same function to define multiple methods. There may be something in the
inspect module more apt to solve the problem -- getmro() perhaps?

Peter