def and_(a, b):
return a.__and__(b)<EOL>
Combines two :any:`Filters<Filter>` with an "and" operation, matching
any results that match both of the given filters.

:param a: The first filter to consider.
:type a: Filter
:param b: The second filter to consider.
:type b: Filter

:returns: A filter that matches both a and b
:rtype: Filter