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.
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6Did you try searching? Searching for "python local global performance" turned up this Stack Overflow question as the first result. More importantly, mutable global variables are a bad idea.– DovalCommented Feb 3, 2015 at 17:04
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If you are working on something where the performance difference between a global and a local matters, you should probably not be using python in the first place. This is a micro-optimization at best, and python's reasons for existence don't include speed.– user53141Commented Feb 4, 2015 at 4:25
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1 Answer
Performance is irrelevant. Globals are evil (as gnat mentioned); you are best off forgetting the global keyword exists. There is always a better way.
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2Feels a bit extreme to say "performance is irrelevant"... also you mention there is a better way, but you don't mention or point to it, so it is not a very useful answer IMHO.– RogerSCommented Dec 23, 2020 at 11:00