lookahead and lookbehind regex code example

Example: Regex lookahead

# Can use a regex,so this Lookahead and Lookbehind ' to see that's there a word character on each end.

import re
import json
 
s = "[[('name', 'productname_0'), ('type', 'html'),('content', 'O'Cornor')],[('name', 'productname_1'), ('type', 'html'), ('content', 'Philp's')]]"
result =  re.sub(r"(?<=\w)\'(?=\w)", r"\\'", s)
print(result)
d = json.dumps(result)
print(json.loads(d))