Matching Whole Words : sub « Regular Expressions « Python Tutorial

1. Python Tutorial
2. Regular Expressions
3. sub

import re

s = '100 BROAD' 
print re.sub('ROAD$', 'RD.', s) 
print re.sub('\\bROAD$', 'RD.', s)              
print re.sub(r'\bROAD$', 'RD.', s)                   
s = '100 BROAD ROAD APT. 3' 
print re.sub(r'\bROAD$', 'RD.', s)                  
print re.sub(r'\bROAD\b', 'RD.', s)