Regex backreference followed by a number (unambiguous backreferences)
I'm scripting something to replace column names based on a regex match. I iterate through all columns and regex regex match with a new string. Works well and handy for shortening col names - except when I am replacing to a string that starts with a number - this is because the backreference gets messed up (\1 becomes \133 in the case below)In python, there is 'unambious backreference' to work arou...