Python super() method

super()�is a built-in method which is useful to call the super class constructor or methods from the sub class. Any constructor written in the super class is not available to the sub class if the sub class has a constructor.

Then how can we initialize the super class instance variables and use them in the sub class? This is done by calling the super class constructor using the�super()�method from inside the sub class constructor.

super() method examples

super() is a built-in method in Python�that contains the history of super class methods.Hence, we can use�super() to refer to super class constructor and methods from a sub class�.

super().__init__()
#call super class constructor 
super().__init__(arguments)
#call super class constructor and pass arguments 
super().method() 
#call super class method

Accessing base class constructor

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#accessing base class constructor in sub class 
class Father:
   def __init__(self, property=0): 
      self.property = property 
   def display_property(self): 
      print('Father\'s property=', self.property) 
class Son(Father): 
   def __init__(self, property1=0, property=0): 
      super().__init__(property) 
      self.property1= property1 
   def display_property(self): 
      print('Total property of child=', self.property1 + self.property) 
#create sub class instance and display father's property 
s = Son(200000.00, 800000.00) 
s.display_property()

Another Python example to access base class constructor and method in the sub class using super().

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#Accessing base class constructor and method in the sub class 
class Square: 
   def __init__(self, x): 
      self.x = x 
   def area(self): 
      print('Area of square=', self.x*self.x) 
class Rectangle(Square): 
   def __init__(self, x, y): 
      super().__init__(x) 
      self.y = y
   def area(self): 
      super().area() 
      print('Area of rectangle=', self.x*self.y) 
      #find areas of square and rectangle 
a,b = [float(x) for x in input("Enter two measurements: ").split()] 
r = Rectangle(a,b) 
r.area()