Question

How to find lists that contain unique elements in list of lists in Python

Answer 1

from collections import Counter
from itertools import chain

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


count = Counter(chain.from_iterable(lst))

indexes = [i for i, x in enumerate(lst) if any(count[y] == 1 for y in x)]

print(indexes)

# index 2 for 7
# index 4 for 9


'''
run:

[2, 4]

'''

 

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