Python: Find A Word Within A String

I'm trying to find a word within a string with Python. str1 = 'This string' if 'is' in str1: print str1 In the above example I would want it to not print str1. While in the fo

Solution 1:

Split the string into words and search them:

if'is' in str1.split(): # 'is' in ['This', 'string']
    print(str1) # never printed

if'is' in str2.split(): # 'is' in ['This', 'is', 'a', 'string']
    print(str2) # printed

Solution 2:

Use regex's word boundary also works

import re

if re.findall(r'\bis\b', str1):
    print str1