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 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.

CodePudding user response：

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
    ...

CodePudding user response：

You need to use what's called a "monkey patch" to override the bar.foo()in the imported instance of the class. This link has a sufficient example:

See Monkey Patching in Python (Dynamic Behavior) - GeeksforGeeks