if in python string code example

Example 1: python check if string in string

if "blah" not in somestring: 
    continue

Example 2: how to check a string in if statement python

if var in ('stringone', 'stringtwo'):
    dosomething()

Example 3: how to check a string in if statement python

if var == 'stringone' or var == 'stringtwo':
    do_something()