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cachetools
========================================================================
This module provides various memoizing collections and function
decorators, including a variant of the Python 3 Standard Library
`functools.lru_cache`_ decorator.
.. code-block:: pycon
>>> from cachetools import LRUCache
>>> cache = LRUCache(maxsize=2)
>>> cache['first'] = 1
>>> cache['second'] = 2
>>> cache
LRUCache(OrderedDict([('first', 1), ('second', 2)]), maxsize=2)
>>> cache['third'] = 3
>>> cache
LRUCache(OrderedDict([('second', 2), ('third', 3)]), maxsize=2)
>>> cache['second']
2
>>> cache
LRUCache(OrderedDict([('third', 3), ('second', 2)]), maxsize=2)
>>> cache['fourth'] = 4
>>> cache
LRUCache(OrderedDict([('second', 2), ('fourth', 4)]), maxsize=2)
For the purpose of this module, a *cache* is a mutable mapping_ of
fixed size, defined by its ``maxsize`` attribute. When the cache is
full, i.e. ``len(cache) == cache.maxsize``, the cache must choose
which item(s) to discard based on a suitable `cache algorithm`_.
This module provides various cache implementations based on different
cache algorithms, as well as decorators for easily memoizing function
calls, and utilities for creating custom cache implementations.
Installation
------------------------------------------------------------------------
Install cachetools using pip::
pip install cachetools
Project Resources
------------------------------------------------------------------------
- `Documentation`_
- `Issue Tracker`_
- `Source Code`_
- `Change Log`_
.. image:: https://pypip.in/v/cachetools/badge.png
:target: https://pypi.python.org/pypi/cachetools/
:alt: Latest PyPI version
.. image:: https://pypip.in/d/cachetools/badge.png
:target: https://pypi.python.org/pypi/cachetools/
:alt: Number of PyPI downloads
License
------------------------------------------------------------------------
Copyright (c) 2014 Thomas Kemmer.
Licensed under the `MIT License`_.
.. _functools.lru_cache: http://docs.python.org/3.4/library/functools.html#functools.lru_cache
.. _mapping: http://docs.python.org/dev/glossary.html#term-mapping
.. _cache algorithm: http://en.wikipedia.org/wiki/Cache_algorithms
.. _Documentation: http://pythonhosted.org/cachetools/
.. _Source Code: https://github.com/tkem/cachetools/
.. _Issue Tracker: https://github.com/tkem/cachetools/issues/
.. _Change Log: http://raw.github.com/tkem/cachetools/master/Changes
.. _MIT License: http://raw.github.com/tkem/cachetools/master/LICENSE
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