4.15. Idiom Itertools

• Learn more at https://docs.python.org/3/library/itertools.html

• More information in Itertools

• itertools.count(start=0, step=1)

• itertools.cycle(iterable)

• itertools.repeat(object[, times])

• itertools.accumulate(iterable[, func, *, initial=None])

• itertools.chain(*iterables)

• itertools.compress(data, selectors)

• itertools.islice(iterable, start, stop[, step])

• itertools.starmap(function, iterable)

• itertools.product(*iterables, repeat=1)

• itertools.permutations(iterable, r=None)

• itertools.combinations(iterable, r)

• itertools.combinations_with_replacement(iterable, r)

• itertools.groupby(iterable, key=None)