Why include the parent class in parentheses when defining a child class?

Question

Python

Hello, I have two versions of the code.
first:

class A:
  def __init__(self):
    print('nice')
class B(A):
  def __init__(self):
    A.__init__(self)
v = B()

and the second version:

class A:
  def __init__(self):
    print('nice')
class B:
  def __init__(self):
    A.__init__(self)
v = B()

both work without errors, but then the question arises - why use the indication of the parent class in brackets?

Answer 1

To inherit the properties of the parent class. Add fields and methods to A, the difference will become noticeable.