Resolving metaclass conflicts

Question

I need to create a class that uses a different base class depending on some condition. With some classes I get the infamous:

TypeError: metaclass conflict: t         


        

Answer 1

To use the pattern described by @michael, but with both Python 2 and 3 compatibility (using the six library):

from six import with_metaclass

class M_C(M_A, M_B):
    pass

class C(with_metaclass(M_C, A, B)):
    # implement your class here