Self-variable In Python:
v self
is the default variable which is always pointing to current object (like this
keyword in Java)
Usage of self-variable
§ self variable can be used to
refer current class instance variable.
§ By
using self we can access instance variables and
instance methods of object.
In Python
constructor must be contains first parameter as self.
def __init__(self):In Python method must be contains first parameter as self.
def fun(self):
§ Every
method, included in the class definition passes the object in question as its
first
parameter. The word self is used for this
parameter (usage of self is actually by
convention, as the word self has no
inherent.
Purpose Of self Variable
self . (self dot)
§ which can be used to
differentiate variable of class and formal parameters of method or constructor.
"self" variable are used for two purpose, they are
§ It always points to current class object.
§ Whenever
the formal parameter and data member of the class are similar and PVM
gets an
ambiguity (no clarity between formal parameter and data members of the
class).
To differentiate
between formal parameter and data member of the class, the data members of the
class must be preceded by "self".
Syntax-:
self.data member of current class.
|
class Employee:
def __init__(self,id,name):
self.id=id
self.name=name
def display(self):
print(self.id)
print(self.name)
e=Employee(101,'Scott')
e.display()
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