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How to override class methods in Python?
Overriding is the property of a class to change the implementation of a method provided by one of its base classes.
Overriding is a very important part of OOP since it makes inheritance utilize its full power. By using method overriding a class may "copy" another class, avoiding duplicated code, and at the same time enhance or customize part of it. Method overriding is thus a part of the inheritance mechanism.
In Python method overriding occurs by simply defining in the child class a method with the same name of a method in the parent class. When you define a method in the object you make this latter able to satisfy that method call, so the implementations of its ancestors do not come in play.
class Parent(object): def __init__(self): self.value = 4 def get_value(self): return self.value class Child(Parent): def get_value(self): return self.value + 1
Now Child objects behave differently
>>> c = Child() >>> c.get_value() 5
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