itertools.product()
itertools.product() is a Python function in the Itertools Module category. Cartesian product of input iterables (like nested for-loops). The syntax is itertools.product(*iterables, repeat=1). Parameters: *iterables. Returns: Iterator of tuples. A typical example: list(product([1,2], ["a","b"]))
# [(1,"a"), (1,"b"), (2,"a"), (2,"b")]. A close sibling is itertools.chain(), which creates an iterator that returns elements from the first iterable until exhausted, then proceeds to the next. A close sibling is itertools.chain.from_iterable(), which alternative chain that takes a single iterable of iterables. A close sibling is itertools.permutations(), which returns all possible r-length ordered arrangements of elements. A close sibling is itertools.combinations(), which returns all r-length unordered combinations without replacement. More about this category: Iterator building blocks — chain, product, permutations, combinations, groupby. For a broader walkthrough, read the Itertools Module guide. Related Itertools Module entries: itertools.chain(), itertools.chain.from_iterable(), itertools.permutations(), itertools.combinations(), itertools.combinations_with_replacement(), itertools.cycle(). This page is part of the free Python Reference documentation covering 978+ functions, methods, and modules with examples and parameter details.