regex lookbehind
# Positive lookahead
q(?=u) # Matches the letter "q" if "q" is followed by the letter "u"
# Negative lookahead
q(?!u) # Matches the letter "q" if "q" is NOT followed by the letter "u"
# Positive lookbehind
(?<=a)b # Matches the letter "b" if "b" is preceded by the letter "a"
# Negative lookbehind
(?<!a)b # Matches the letter "b" if "b" is NOT preceded by the letter "a"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))Copyright © 2021 Codeinu
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