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What is the itertools module used for?

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01

Understand the problem

Explain itertools.

itertools
02

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03

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itertools builds efficient iterators: infinite (count, cycle, repeat), combinatoric (product, permutations, combinations), and terminating (chain, groupby, islice, accumulate). They enable memory-efficient, composable iteration.

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04

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PYproduct, combinations, accumulate, islice(count())
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