if not in python code example

Example 1: python if not true

a = False
if not a:
  #Does this

a = True
if not a:
  #Doesn't do this

Example 2: python if not

# Using "if not" is practically saying that, 'if this condition is false......'
a = False
if not a:
  print("a is False")
  
# IS SAME AS:

if a == False:
  print("a is False")

Example 3: python not in

arr = ['a','b','c','d','e','f']

if 'g' not in arr:
    print('g is not in the list')

Example 4: is not in python

li = [1,2,'a','b']
if 'hello' not in li:
    print('hello is not in the list')

Example 5: python not in list

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

Example 6: python is not

result is not None