#!/usr/bin/env python
# coding: utf-8

# # Inheritance
# - powerful feature that facilitates code reuse mimicking real-world phenomena
# - ability to define a new class (child) that is modified version of an existing class (parent)
# - can add new methods and properties to a class without modifying the existing class
# <strong>Limitation(s):</strong><br>
#     - can make programs difficult to read
#     - when method is invoked, it is sometimes not clear where to find its definition esp. in a large project relevant code may be scattered among several modules

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class A(object):
    def __init__(self):
        self.a = 'A'
        
    def printMe(self):
        print("A's info: {}".format(self.a))

class B:
    def __init__(self):
        self.b = 'B'
        
    def printMe(self):
        print("B's info: {}".format(self.b))
        
class C(B, A): # what happens if you change order?
    def __init__(self):
        A.__init__(self)
        B.__init__(self)
        self.c = 'C'
    
    def printMe(self):
        print("A's info: {}".format(self.a))
        print("B's info: {}".format(self.b))
        print("C's info: {}".format(self.c))
        


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obja = A()
obja.printMe()
objb = B()
objb.printMe()
objc = C()
objc.printMe()


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# How can objects of type C can print their c property info


# ## abc module - Abstract Base Classes
# - allows to define ABCs with abstract methods @abstractmethod decorators

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