The Toolz version has a different purpose than the one from Python's stdlib (itertools). One is unsorted input, while the other one is for sorted input. The Too

The Toolz version has a different purpose than the one from Python's stdlib (itertools). One is unsorted input, while the other one is for sorted input. The Toolz version is not a replacement and the documentation states > Not to be confused with ``itertools.groupby``