python ValueError: "" is not in list code example

Example 1: python not in list

>>> 3 not in [2, 3, 4]
False
>>> 3 not in [4, 5, 6]
True

Example 2: python checking not in list

a = [1, 2, 3, 4, 5, 6]
b = 7
c = 4

# use "not in" to check if something is not an element of a list
# use "in" to check if something is an element of a list

if b not in a:
  print('True')
else:
  print('False')

if c in a:
  print('True')
else:
    print('False')