Swapping 1 with 0 and 0 with 1 in a Pythonic way

Question

In some part of my Python program I have a val variable that can be 1 or 0. If it\'s 1 I must change to 0, if it\'s 0 I must change to 1.

How do you do it in a Pytho

Answer 1

Function with mutable argument. Calling the swaper() will return different value every time.

def swaper(x=[1]):
    x[0] ^= 1
    return x[0]