blob: a5627cc114a8d55ce88a549a427d591fa7225698 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
cachetools
========================================================================
.. image:: https://img.shields.io/pypi/v/cachetools
:target: https://pypi.org/project/cachetools/
:alt: Latest PyPI version
.. image:: https://img.shields.io/github/actions/workflow/status/tkem/cachetools/ci.yml
:target: https://github.com/tkem/cachetools/actions/workflows/ci.yml
:alt: CI build status
.. image:: https://img.shields.io/readthedocs/cachetools
:target: https://cachetools.readthedocs.io/
:alt: Documentation build status
.. image:: https://img.shields.io/codecov/c/github/tkem/cachetools/master.svg
:target: https://codecov.io/gh/tkem/cachetools
:alt: Test coverage
.. image:: https://img.shields.io/librariesio/sourcerank/pypi/cachetools
:target: https://libraries.io/pypi/cachetools
:alt: Libraries.io SourceRank
.. image:: https://img.shields.io/github/license/tkem/cachetools
:target: https://raw.github.com/tkem/cachetools/master/LICENSE
:alt: License
.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
:target: https://github.com/psf/black
:alt: Code style: black
This module provides various memoizing collections and decorators,
including variants of the Python Standard Library's `@lru_cache`_
function decorator.
.. code-block:: python
from cachetools import cached, LRUCache, TTLCache
# speed up calculating Fibonacci numbers with dynamic programming
@cached(cache={})
def fib(n):
return n if n < 2 else fib(n - 1) + fib(n - 2)
# cache least recently used Python Enhancement Proposals
@cached(cache=LRUCache(maxsize=32))
def get_pep(num):
url = 'http://www.python.org/dev/peps/pep-%04d/' % num
with urllib.request.urlopen(url) as s:
return s.read()
# cache weather data for no longer than ten minutes
@cached(cache=TTLCache(maxsize=1024, ttl=600))
def get_weather(place):
return owm.weather_at_place(place).get_weather()
For the purpose of this module, a *cache* is a mutable_ mapping_ of a
fixed maximum size. When the cache is full, i.e. by adding another
item the cache would exceed its maximum size, the cache must choose
which item(s) to discard based on a suitable `cache algorithm`_.
This module provides multiple cache classes based on different cache
algorithms, as well as decorators for easily memoizing function and
method calls.
Installation
------------------------------------------------------------------------
cachetools is available from PyPI_ and can be installed by running::
pip install cachetools
Typing stubs for this package are provided by typeshed_ and can be
installed by running::
pip install types-cachetools
Project Resources
------------------------------------------------------------------------
- `Documentation`_
- `Issue tracker`_
- `Source code`_
- `Change log`_
Related Projects
------------------------------------------------------------------------
- asyncache_: Helpers to use cachetools with async functions
- cacheing_: Pure Python Cacheing Library
- CacheToolsUtils_: Cachetools Utilities
- kids.cache_: Kids caching library
- shelved-cache_: Persistent cache for Python cachetools
License
------------------------------------------------------------------------
Copyright (c) 2014-2024 Thomas Kemmer.
Licensed under the `MIT License`_.
.. _@lru_cache: https://docs.python.org/3/library/functools.html#functools.lru_cache
.. _mutable: https://docs.python.org/dev/glossary.html#term-mutable
.. _mapping: https://docs.python.org/dev/glossary.html#term-mapping
.. _cache algorithm: https://en.wikipedia.org/wiki/Cache_algorithms
.. _PyPI: https://pypi.org/project/cachetools/
.. _typeshed: https://github.com/python/typeshed/
.. _Documentation: https://cachetools.readthedocs.io/
.. _Issue tracker: https://github.com/tkem/cachetools/issues/
.. _Source code: https://github.com/tkem/cachetools/
.. _Change log: https://github.com/tkem/cachetools/blob/master/CHANGELOG.rst
.. _MIT License: https://raw.github.com/tkem/cachetools/master/LICENSE
.. _asyncache: https://pypi.org/project/asyncache/
.. _cacheing: https://github.com/breid48/cacheing
.. _CacheToolsUtils: https://pypi.org/project/CacheToolsUtils/
.. _kids.cache: https://pypi.org/project/kids.cache/
.. _shelved-cache: https://pypi.org/project/shelved-cache/
|
