Clean nested lists in Python -



Clean nested lists in Python -

say have list in python:

l = [1, 2, 3, [a, [[9, 10, 11]], c, d], 5, [e, f, [6, 7, [8]]]]

i clean nested lists that, if of length 1 (just 1 item), "pulled up" out of list, such revised list like:

l = [1, 2, 3, [a, [9, 10, 11], c, d], 5, [e, f, [6, 7, 8]]]

naturally can check if len == 1 , replace index contents, but... there built-in way this?

you utilize recursive function:

def expand_singles(item): if isinstance(item, list): if len(item) == 1: homecoming expand_singles(item[0]) homecoming [expand_singles(i) in item] homecoming item

demo:

>>> def expand_singles(item): ... if isinstance(item, list): ... if len(item) == 1: ... homecoming expand_singles(item[0]) ... homecoming [expand_singles(i) in item] ... homecoming item ... >>> l = [1, 2, 3, ['a', [[9, 10, 11]], 'c', 'd'], 5, ['e', 'f', [6, 7, [8]]]] >>> expand_singles(l) [1, 2, 3, ['a', [9, 10, 11], 'c', 'd'], 5, ['e', 'f', [6, 7, 8]]]

python list data-cleansing

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