The regex module

Regular expressions: test whether text matches a pattern, find the matches and their capture groups, and replace or split by a pattern.

Bring it in with import regex. The syntax is RE2’s, and matching takes time linear in the size of the text whatever the pattern.

• Regex and Match: Regex, Match, Matches

Example

import regex;

main(): int {
    var word = regex.Regex("\\b(\\w)(\\w*)\\b");
    assert(word.replace_all("hello big world", "${1}.") == "h. b. w.", "initials");
    return 0;
}

Source: runtime/regex/module.pep