Track 10 · Lesson 5 of 12

itertools and functools

Combine, group, pair up and accumulate data with itertools, and build functions from functions with functools.reduce and partial.

You will be able to

• Join iterables with chain and take a slice of any iterable with islice
• Group consecutive records with groupby, sorting first so each key forms one group
• Generate combinations and permutations, and running totals with accumulate
• Fold a sequence into one value with functools.reduce and pre-fill arguments with functools.partial