Question

In many programming languages, the following

find foo([a-z]+)bar and replace with GOO\U\1GAR

will result in the entire match being made uppercase. I can’t seem to find the equivalent in python; does it exist?

Answer 1

You can pass a function to re.sub() that will allow you to do this, here is an example:

 def upper_repl(match):
     return 'GOO' + match.group(1).upper() + 'GAR'

And an example of using it:

 >>> re.sub(r'foo([a-z]+)bar', upper_repl, 'foobazbar')
 'GOOBAZGAR'