In a coursera python course video the following code was presented:
a = [4,5,6]
def mutate_part(x):
a[1] = x
mutate_part(200)
The presenter said something like "a is a global variable, so a becomes
[4,200,6] after running mutate_part(200)."
Indeed it does, but why does this work without specifying a as global
within mutate()?
My thinking was that an "undefined" error should have been raised.
Help me understand. Thanks,
-Denis
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