Return self in python [closed]

Answer 1

Here is an example which demonstrates a scenario when it may be a good technique

class A:
    def __init__(self, x):
        self.x = x
    def add(self, y):
        self.x += y
        return self
    def multiply(self, y):
        self.x *= y
        return self
    def get(self):
        return self.x
a = A(0)
print a.add(5).mulitply(2).get()

In this case you are able to create an object in which the order in which operations are performed are strictly determined by the order of the function call, which might make the code more readable (but also longer).