.. _datatypes: ********** Data Types ********** The modules described in this chapter provide a variety of specialized data types such as dates and times, fixed-type arrays, heap queues, synchronized queues, and sets. Python also provides some built-in data types, in particular, :class:`dict`, :class:`list`, :class:`set` and :class:`frozenset`, and :class:`tuple`. The :class:`str` class is used to hold Unicode strings, and the :class:`bytes` class is used to hold binary data. The following modules are documented in this chapter: .. toctree:: datetime.rst calendar.rst collections.rst heapq.rst bisect.rst array.rst sched.rst queue.rst weakref.rst types.rst copy.rst pprint.rst reprlib.rst