Post Syndicated from original https://lwn.net/Articles/885682/

Regular
expressions are a common feature of computer languages, especially
higher-level languages like Ruby, Perl, Python, and others, for doing
fairly sophisticated text-pattern matching. Some languages, including
Perl,
incorporate regular expressions into the language itself,
while others have classes or libraries that come with the language
installation. Python’s standard library has the re module,
which provides facilities for working with regular expressions; as a recent
discussion on the python-ideas mailing shows, though, that module has
somewhat fallen by the wayside in recent times.