Which Regular Expression flavour is used in Python?

icu, pcre, python, regex

Solution

It's compatible enough w/ Perl, meaning most Perl expressions will work unmodified. It aims to be Perl compatible but, of course, there are some minor differences.

It, technically, uses its own flavor of regular expressions. For instance, named groups were offered in Python regex long-before other implementations adopted the syntax. It also supports Unicode out of the box. Most Python extensions are supported elsewhere these days. See http://docs.python.org/library/re.html

Problem

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