calling child class method from parent class file in python

Question

parent.py:

class A(object):
    def methodA(self):
        print(\"in methodA\")

child.py:

from paren         


        

Answer 1

You can do something like this:

class A():
    def foo(self):
        self.testb()

class B(A):
    def testb(self):
        print('lol, it works')
b = B()
b.foo()

Which would return this of course:

lol, it works

Note, that in fact there is no call from parent, there is just call of function foo from instance of child class, this instance has inherited foo from parent, i.e. this is impossible:

a=A()
a.foo()

will produce: AttributeError: A instance has no attribute 'testb'

because

>>> dir(A)
['__doc__', '__module__', 'foo']
>>> dir(B)
['__doc__', '__module__', 'foo', 'testb']

What I've wanted to show that you can create instance of child class, and it will have all methods and parameters from both parent and it's own classes.