nb.ipynb
from itertools import filterfalse

array = list(range(10))

omit_threes = lambda x: x % 3 == 0

for num in filterfalse(omit_threes, array):
    print(num)
nb.ipynb
array = list(range(10))

for num in array:
    if num % 3 != 0:
        print(num)
1
2
4
5
7
8