get lowercase letters

Find 7 letter words that are spelled the same forwards as they are backwards.

Verbose IP4 simple address re N.B. You need to ensure that the re is in trebble quotes r""" .... """

Allows exaclty 4 groups of digits in the range 0..255 seperated by . characters

valida fechas de 19## a 20##, en formato yyyy-MM-dd

ContentPlace Xml Tag

Accepts only integer or Flating values upto 3 decimals. To accept n decimals change (1,n)

This regex checks if a user has input 4 digit year integer.

This simple regex checks if a user has input correct YYYY format.

Pattern used to filter URL origin (protocol:host) for yFrame.

parses user/repo