translate to re clear solution for Unix Match. Part 2 by juestr - python coding challenges

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translate to re solution in Clear category for Unix Match. Part 2 by juestr

import re

def unix_match(filename: str, pattern: str) -> bool:
    try:
        p = re.escape(pattern) \
            .replace(r'\[!', r'[^').replace(r'\[', r'[') \
            .replace(r'\]', r']').replace(r'[^]', r'\[!\]')
        return re.fullmatch(p, filename) is not None
    except re.error:
        return False

Aug. 6, 2021

Comments:

Ulukai85 on July 13, 2022, 7:35 a.m.
Interesting solution, just using error handling. Perhaps you could replace (hehe) line 8 with "return bool(re.fullmatch(p, filename))" to get rid of the double negation?

juestr on July 13, 2022, 9:41 a.m.
It sounds like a double negation but technically `None` is a constant like any other. Also I believe `is not None` is faster and cleaner than `bool()` since it doesn't depend on boolean conversion of a `Match` object.

Ulukai85 on July 13, 2022, 9:45 a.m.
Oh, that makes sense, right. Thanks for the answer!

H0r4c3 on April 30, 2023, 9:40 p.m.
Great use of regex! Regex for the win!

Mine

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