How to remove empty lists from a list and extract values using python

Question

I want to remove empty list and extra [] around elements

Input: data = [[1], [], [2], [], [], [4]];
Expected: output = [1,2,4]

When I do this : d = [x for x in data if x] I have an output with [] around elements as below:

[[1], [2], [4]]

Appreciate if someone can help!

You just want to *flatten* the list, empty sublists will vanish in the process. — deceze, Jan 17 '23 at 18:27

score 1 · Answer 1 · answered Jan 17 '23 at 18:36

1

from itertools import chain

print(list(chain(*data)))

answered Jan 17 '23 at 18:36

Shirin Yavari

2

`chain(*data)` -> `chain.from_iterable(data)` – juanpa.arrivillaga Jan 17 '23 at 18:40

1 Answers1