``\w``

For Unicode (str) patterns:

Matches Unicode word characters; this includes most characters

that can be part of a word in any language, as well as numbers and

the underscore. If the:const:`ASCII` flag is used, only

``[a-zA-Z0-9_]`` is matched.

Matches Unicode word characters; this includes alphanumeric characters (as defined by:meth:`str.isalnum`)

as well as the underscore (``_``).

If the:const:`ASCII` flag is used, only ``[a-zA-Z0-9_]`` is matched.

For 8-bit (bytes) patterns:

Matches characters considered alphanumeric in the ASCII character set;