modify list element with list comprehension in python

Question

folks,

I want to modify list element with list comprehension. For example, if the element is negative, add 4 to it.

Thus the list

a = [1, -2 ,          


        

Answer 1

Why mutate, when you can just return a new list that looks like you want it to?

[4 + x if x < 0 else x for x in [1, -2, 2]]