Flatten a shallow listΒΆ

Flatten a shallow list.
import itertools

LOL = [[2,4,3], [1,5,6], [9], [7,9,0]]

new_merged_list = list(itertools.chain(*LOL))

print(new_merged_list)    # [2, 4, 3, 1, 5, 6, 9, 7, 9, 0]