> regex allows us to specify certain conditions in the patterns > such as whether the characters are digits etc, and also whether > we are kooking for a word which is wat you want. > Specifically \W signifies a word boundary so > > \Whello\W > > will find hello as a word.
Hi Alan, Using the non-word pattern '\W' will work except in cases where we're right at the edge: ###### >>> import re >>> re.sub(r'\Whi\W', 'hello', 'hi there') 'hi there' ###### Slightly more robust is the '\b' boundary assertion pattern: ###### >>> re.sub(r'\bhi\b', 'hello', 'hi there') 'hello there' ###### Best of wishes! _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
