Swapping 1 with 0 and 0 with 1 in a Pythonic way
python
Solution
This isn't pythonic, but it is language neutral. Often `val = 1 - val` is simplest.
Problem
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 Pythonic way? ``` if val == 1: val = 0 elif val == 0: val = 1 ``` it's too long! I did: ``` swap = {0: 1, 1:0} ``` So I can use it: ``` swap[val] ``` Other ideas?