14. Itertools Module

The itertools module provides tools for creating and working with iterators.

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Common Functions

import itertools

print(list(itertools.count(10, 2)))    # infinite sequence
print(list(itertools.islice(itertools.count(), 5)))  # slice from infinite

from itertools import permutations, combinations

print(list(permutations([1, 2, 3], 2)))
print(list(combinations([1, 2, 3], 2)))

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Wrap-Up

• itertools is powerful for iteration patterns.