[Python] iter, range in for loop

I thought the for in statement takes in iterables not iterators, but somehow the following code works fine. I am confused. Actually, I was looking at the generator example in PEP 289:

>>> for i in range(10):
print(i)


0
1
2
3
4
5
6
7
8
9
>>> for i in iter(range(10)):
print(i)


0
1
2
3
4
5
6
7
8
9
>>>


Can anyone explain what happened when using iter(range(10)) in the for loop?

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