classtree.py

#!/usr/bin/env python3

"""
classtree.py Climb inheritance tree using namespace links,
displaying higher superclasses with indentation for height
"""


def classtree(cls, indent):
    print('.' * indent + cls.__name__)
    for supercls in cls.__bases__:
        classtree(supercls, indent + 3)


def instancetree(inst):
    print('Tree of %s' % inst)
    classtree(inst.__class__, 3)


def selftest():
    class A:
        pass

    class B(A):
        pass

    class C(A):
        pass

    class D(B, C):
        pass

    class E:
        pass

    class F(D, E):
        pass

    instancetree(B())
    instancetree(D())
    instancetree(F())

if __name__ == '__main__':
    selftest()