how to refer to a parent method in python? [duplicate]

Answer 1

class B(A):
    def f(self, num):
        return 7 * super(B, self).f(num)

Answer 2

If you know you want to use A you can also explicitly refer to A in this way:

class B(A):
    def f(self,num): 
        return 7 * A.f(self,num)

remember you have to explicitly give the self argument to the member function A.f()

Answer 3

Why not keep it simple?

class B(A):
    def f(self, num):
        return 7 * A.f(self, num)

Answer 4

In line with the other answers, there are multiple ways to call super class methods (including the constructor), however in Python-3.x the process has been simplified:

Python-2.x

class A(object):
 def __init__(self):
   print "world"

class B(A):
 def __init__(self):
   print "hello"
   super(B, self).__init__()

Python-3.x

class A(object):
 def __init__(self):
   print "world"

class B(A):
 def __init__(self):
   print "hello"
   super().__init__()

super() is now equivalent to super(<containing classname>, self) as per the docs.

Answer 5

you can use super or if you can be more explicit and do something like this.

class B(A):
  def f(self, num):
    return 7 * A.f(self, num)

Answer 6

Check out my answer at Call a parent class's method from child class in Python?.

It's a slight twist on some others here (that don't use super).