itertools module - combinatoric iterators
Categories: python standard library
The itertools module provides several combinatoric iterators. These functions take one or more input iterables and return an iterator that provides a specific set of combinations of the elements of those iterables.
The itertools functions in this section are:
- Cartesian product - generates the cartesian product of two or more lists.
- Permutations - generates all possible permutations of items from a list.
- Combinations - generates all possible combinations of items from a list. When using the
combinations, an item cannot be used more than once (that is sometimes called combinations without replacement). Alternatively, thecombinations_with_replacementfunction generates all possible combinations of items from a list with, replacements. That means that an item from the list can be used more than once.
The functions can be applied to lists or more generally to any iterable data.
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