Replace a parent class with another class without keeping the old parent

Question

What I have in an external library:

# external package content


class Foo:
    
    def func(): ...


class Bar(Foo):
    
    def func():
        super().func()

What I need in my code:

from external_library import Bar

class MyOwnCustomFoo:

    def func(): ...


# Do some magic here to replace a parent class with another class without keeping the old parent


# Class name can be not 'Bar', but the class must have all 'Bar' attributes
class Bar(MyOwnCustomFoo):

    def func():
        super().func()

Goals I need to achieve:

1. I must have all Bar methods without copy/pasting them.
2. Bar must inherit from my own class, not from another one.

Answer 1

You could assign the methods from the external library class to your own class, mimicking inheritance (AFAIK this is called monkey-patching):

from external_library import Bar as _Bar

class Bar(MyOwnCustomFoo):
    func = _Bar.func
    ...