Inheriting from classes unpacked from a list

Question

Say I have a list of class objects in Python (A, B, C) and I want to inherit from all of them when building class D, such as:

class A(object):
    pass

class B(object):
    pass

class C(object):
    pass


classes = [A, B, C]

class D(*classes):
    pass

Unfortunately I get a syntax error when I do this. How else can I accomplish it, other than by writing class D(A, B, C)? (There are more than three classes in my actual scenario)

Answer 1

You can dynamically create classes using type keyword, as in:

>>> classes = [A, B, C]
>>> D = type('D', tuple(classes), {})
>>> type(D)
<class 'type'>
>>> D.__bases__
(<class '__main__.A'>, <class '__main__.B'>, <class '__main__.C'>)

see 15247075 for more examples.