:term:`finder`. See :pep:`302` for details and
:class:`importlib.abc.Loader` for an :term:`abstract base class`.
+ magic method
+ .. index:: pair: magic; method
+
+ An informal synonym for :term:`special method`.
+
mapping
A container object that supports arbitrary key lookups and implements the
methods specified in the :class:`~collections.abc.Mapping` or
(subscript) notation uses :class:`slice` objects internally.
special method
+ .. index:: pair: special; method
+
A method that is called implicitly by Python to execute a certain
operation on a type, such as addition. Such methods have names starting
and ending with double underscores. Special methods are documented in