Скачать или смотреть Python List of Lists Group By – A Simple Illustrated Guide [+Pandas.GroupBy()]

This tutorial shows you how to group the inner lists of a Python list of lists by common element. There are three basic methods:

1) Group the inner lists together by common element.
2) Group the inner lists together by common element AND aggregating them (e.g. averaging).
3) Group the inner lists together by common element AND aggregating them (e.g. averaging) using the Pandas external library.

Read the full article at:
https://blog.finxter.com/python-list-...

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