python not in string code example

Example 1: python string contains substring

fullstring = "StackAbuse"
substring = "tack"

if fullstring.find(substring) != -1:
    print "Found!"
else:
    print "Not found!"

Example 2: python not in

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

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

Example 3: python check if string in string

if "blah" not in somestring: 
    continue

Example 4: python check if value in string

def is_value_in_string(value: str, the_string: str):
    return value in the_string.lower()