Self Variable in _init_ constructor

 

Self Variable in _init_ constructor

* 'Self' is a default variable that contains the memory address of the instance of the current class which is under current usage .

 

* So , one can use 'self' instance variable to refer to all the instance variables and Instance Methods .

 

* When an instance of the class is created , the

instance name contains the memory location of the instance . The memory location is internally passed to the 'self' . For example , one can create an instance of the Student Class in the given manner :

 

S1 = Student()

 

* Here , 's1' contains the memory address of the instance . This memory address is internally and by default passed to the 'self' variable .

 

 

* Since the 'self' knows the memory address of the instances , it can refer to all the members of the instance .

 

* One can use 'self' in the following ways :

1) The 'self' variable is used as a first parameter within the constructor as :

 

def _init_(self):

In this case , 'self' can be used to refer to the instance variables inside the constructor .

 

2) 'self' can be used as a first parameter in the instance method as :

 

def talk(self):

 

* Here , talk() is an instance method as it acts on the instance variables present within the Class and defined under the _init_(self): method .

 

* If the method wants to act on the instance variables , then the method should know the memory location of the instance variables . That memory location is by default available to the talk() method through the 'self' method .