[$] Python support for regular expressions

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