Python find first instance of non zero number in list

Question

I have a list like this

myList = [0.0 , 0.0, 0.0, 2.0, 2.0]

I would like to find the location of the first number in the list that is not e

Answer 1

Simply use a list comprehension:

myDict = {x: index for index, x in enumerate(myList) if x}

The indices of the nonzero elements are myDict[element].