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kylecampbell/flatten_list_of_lists.py

Last active February 1, 2019 18:57
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Flatten List of Lists
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flatten_list_of_lists.py
# METHOD 1 vs. METHOD 2
# test sample
l = [[1,2,3],[4,5,6], [7], [8,9]]*99
# METHOD 1: List Comprehension (slower)
flat_list = [item for sublist in l for item in sublist]
# tested in .ipynb with %timeit
# METHOD 2: itertools chain (~2x faster)
from itertools import chain
flat_list = list(chain.from_iterable(l))
# tested in .ipynb with %timeit
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