What are iterators in Python?

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00:07 Generator objects are iterators
00:37 Iterables are powered by iterators
01:04 Iterators power all iteration
01:22 Python uses iterators to run for loops
01:47 Iterators are also iterables
02:07 Iterators are their own iterators
02:48 The Iterator Protocol
03:22 Iterators are lazy iterables that power all other iterables