python - Last occurrence of a word and trailing

I am looking to match the last occurrence of a word (excluded) in a sentence with the remaining words.

Example
Looking for the word "potato, ", expecting to select what's in bold:

potato, orange, potato, plum, pear, etc.

Regex I put together is something like this however not working fully

(potato:(?!.*potato)).*

Answer

You can look for 1 or more groups of "anything followed by potato", without capturing them, then capture the rest of the string:

import re

regex = re.compile(r'(?:.*potato)+(.*)')
m = regex.match('potato, orange, potato, plum, pear, etc.')
m.groups(1)[0]

# ', plum, pear, etc.'

And as a plus, you don't have to make potato appear twice in the regex.