regex (vim) for print … to print(…) for python2 to python3

Question

This post is helpful only if you have strings inside of the print command. Now I have tons of sourcecode with a statement such as

print milk,butter
<         


        

Answer 1

You could use 2to3 and only apply the fix for print statement -> print function.

2to3 --fix=print [yourfiles]

This should automatically handle all those strange cases which won't work with e.g. a vim regex.

If you are missing the 2to3 shell script for some reason, run the lib as a module:

python -m lib2to3 --fix=print [yourfiles]