how to check if a string is a character in python code example

Example 1: how to check if there is a word in a string in python

>>> str = "Messi is the best soccer player"
>>> "soccer" in str
True
>>> "football" in str
False

Example 2: python check if character is letter

>>> 'A'.isalpha()
True
>>> '1'.isalpha()
False

Example 3: python check if string in string

if "blah" not in somestring: 
    continue

Example 4: how to check a string in if statement python

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