Vim Regex For Python2 Print To Python3

So say I have a python v2.7 file with some code like this: print 'asdf' print 'hi mom!' But I want to run it in python3, I'll need to add those parenthesis to them like so: print(

Solution 1:

This would work for your examples

:%s/print \('.*'\)/print(\1)/g

1. You don't need to escape the space.
2. You don't actually capture anything in parenthesis so the \1 is an empty string in your regex.

But I also recommend using 2to3