[Python] How can I access the index value in a 'for' loop?

How do I access the index while iterating over a sequence with a for loop?

xs = [8, 23, 45]

for x in xs:
print("item #{} = {}".format(index, x))


Desired output:

item #1 = 8
item #2 = 23
item #3 = 45

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