You probably know this, but for the other readers, I'd like to note that "groupby" specifically is part of Python's standard library (in "itertools" module) ht

You probably know this, but for the other readers, I'd like to note that "groupby" specifically is part of Python's standard library (in "itertools" module) https://docs.python.org/3/library/itertools.html#itertools.groupby https://docs.python.org/3/library/itertools.html#itertools.g... Don't forget that python is batteries included -- and you can avoid 3rd party dependencies a lot of times.