POLYMORPHISM

Polymorphism in Python

What is Polymorphism : 

The word polymorphism means having many forms. In programming, polymorphism means same function name (but different signatures) being uses for different types.

 

Example of inbuilt polymorphic functions :

# Python program to demonstrate in-built poly- # morphic functions    # len() being used for a string print(len("geeks"))    # len() being used for a list print(len([10, 20, 30]))

 

Output:

5

3

 

Examples of used defined polymorphic functions :

# A simple Python function to demonstrate  # Polymorphism    defadd(x, y, z =0):      returnx +y+z # Driver code  print(add(2, 3)) print(add(2, 3, 4))

 

Output:

5

9

 

Polymorphism with class methods:
Below code shows how python can use two different class types, in the same way. We create a for loop that iterates through a tuple of objects. Then call the methods without being concerned about which class type each object is. We assume that these methods actually exist in each class.

# A simple Python function to demonstrate  # Polymorphism    defadd(x, y, z =0):      returnx +y+z    # Driver code  print(add(2, 3)) print(add(2, 3, 4))

 

Output:

5

9

Polymorphism with class methods:
Below code shows how python can use two different class types, in the same way. We create a for loop that iterates through a tuple of objects. Then call the methods without being concerned about which class type each object is. We assume that these methods actually exist in each class.

# A simple Python function to demonstrate  # Polymorphism    defadd(x, y, z =0):      returnx +y+z    # Driver code  print(add(2, 3)) print(add(2, 3, 4))

 

Output:

5

9

 

Polymorphism with class methods:
Below code shows how python can use two different class types, in the same way. We create a for loop that iterates through a tuple of objects. Then call the methods without being concerned about which class type each object is. We assume that these methods actually exist in each class.

deffunc(obj):     obj.capital()     obj.language()     obj.type()     obj_ind =India() obj_usa =USA()     func(obj_ind) func(obj_usa)

 
Code : Implementing Polymorphism with a Function

classIndia():     defcapital(self):         print("New Delhi is the capital of India.")         deflanguage(self):         print("Hindi is the most widely spoken language of India.")         deftype(self):         print("India is a developing country.")     classUSA():     defcapital(self):         print("Washington, D.C. is the capital of USA.")         deflanguage(self):         print("English is the primary language of USA.")         deftype(self):         print("USA is a developed country.")      deffunc(obj):     obj.capital()     obj.language()     obj.type()     obj_ind =India() obj_usa =USA()     func(obj_ind) func(obj_usa)

 

Output:

New Delhi is the capital of India.

Hindi is the most widely spoken language of India.

India is a developing country.

Washington, D.C. is the capital of USA.

English is the primary language of USA.

USA is a developed country.