Inheritance Method in Python

Question

Is there a method in python that will trigger when class was inherited?

class Base:
  __inherit__( cls ):
    cls.bar += 'World!'

class Foo( Base ):
  bar = 'Hello, '

Foo.bar # 'Hello, World!'

Answer 1

I believe you are looking for __init_subclass__:

class Base:

    def __init_subclass__(cls, **kwargs):
        cls.bar += "World"

class Foo(Base):
    bar = 'Hello, '

print(Foo.bar)

Output:

Hello, World