Используйте модуль inspect :
class A:
def foo(self):
pass
class B(A):
def boo(Aself):
pass
class C(B):
def coo(self):
pass
class D(C):
def doo(self):
pass
import inspect
inspect.classify_class_attrs(D)
[('__doc__', 'data', <class __main__.D at 0x85fb8fc>, None),
('__module__', 'data', <class __main__.D at 0x85fb8fc>, '__main__'),
('boo',
'method',
<class __main__.B at 0x85fb44c>,
<function boo at 0x8612bfc>),
('coo',
'method',
<class __main__.C at 0x85fb8cc>,
<function coo at 0x8612ca4>),
('doo',
'method',
<class __main__.D at 0x85fb8fc>,
<function doo at 0x8612f0c>),
('foo',
'method',
<class __main__.A at 0x85fb71c>,
<function foo at 0x8612f7c>)]