Gets all numbers in a string. This includes positive and negative numbers aswell as integers and floats. By: http://www.benlorantfy.com/

Match regular expressions substitutions, I personally use this to perform my validate if it is a substitution, then call re.sub() on it.

This will remove all facebook urls from a HTML string

Only captures value for converting percentage to decimal. Returns empty if percentage but no value. no match = no percentage found

Matches HTML structure

matching words between square brachets tags include newline or carriage return

Matches any IPv4 address

repeat ... refactor

match

This expression should both normal and wildcard targets and rules wrapped in simple sub-shell or varriable substitution enclosures.