-
:mod:`collections` --- Container datatypes
==========================================
del self[key]
OrderedDict.__setitem__(self, key, value)
-An ordered dictionary can combined with the :class:`Counter` class
+An ordered dictionary can be combined with the :class:`Counter` class
so that the counter remembers the order elements are first encountered::
class OrderedCounter(Counter, OrderedDict):
subclass) or an arbitrary sequence which can be converted into a string using
the built-in :func:`str` function.
+
.. _collections-abstract-base-classes:
ABCs - abstract base classes