How to toggle a value in Python

Question

What is the most efficient way to toggle between 0 and 1?

Answer 1

You can make use of the index of lists.

def toggleValues(values, currentValue):
    return values[(values.index(currentValue) + 1) % len(values)]

> toggleValues( [0,1] , 1 )
> 0
> toggleValues( ["one","two","three"] , "one" )
> "two"
> toggleValues( ["one","two","three"] , "three")
> "one"

Pros: No additional libraries, self.explanatory code and working with arbitrary data types.

Cons: not duplicate-save. toggleValues(["one","two","duped", "three", "duped", "four"], "duped") will always return "three"