Python: Faster to use global variable or pass as arguments to a function? [duplicate]

Question

This question already has an answer here:

• Why is Global State so Evil? 17 answers

Hey so i was wondering which is the more efficient way, or better practice to do in this situation.

1,

def function():
    global number
    number += 2

Or 2,

def function(number):
    return number += 2

Thanks.

Answer 1

Performance is irrelevant. Globals are evil (as gnat mentioned); you are best off forgetting the global keyword exists. There is always a better way.