Problem Statement
Have you ever wandered if we could make an object callable? Yes, I mean just use the object name as if you were calling function! Intersted?
Solution
[sourcecode language=”python”]
class Add:
def __init__(self, num1, num2):
self.num1 = num1
self.num2 = num2
print "Sum of", self.num1,"and",self.num2, "is:"
def __call__(self):
return (self.num1 + self.num2)
add = Add(1,2)
print add()
[/sourcecode]
Output
Sum of 1 and 2 is:
3
Explanation
In this example, when ‘add’ is created using add = Add(1,2), def __init__() is called, since the constructor is called while object is getting created.
Because of the attribute __call__, the object becomes callable and hence we could use as add(). when add() is used, def __call__() is called.
