txt2regex (interactive regular expression trainer)

Txt2regex is a regular expression wizard for the command line.

Users with little or no knowledge of regular expressions can quickly
create hairy regexes by answering questions in a simple text-based
interactive interface.

Txt2regex is aware of the particular notation and caveats of many
different regular expression flavors, generating valid regexes for
more than 20 targets, including grep, sed, Vim, Emacs, JavaScript,
Python, PHP, PostgreSQL.