Skip to main content

Cache Backend system for python objects

Project description

Python pussy cache
==================

Python pussy cache is a Cache system for python objects.

Cache backends can be in-memory or redis/ You can even use the django
cache framework with Python-pussy-cache.

Given a one of the cache backends and any Python class you have
define, Python-pussy-cache will cache the results of methods you have
define and will also manage the cache invalidation by timestamp or
with methods you have defined.

[![Build Status](https://secure.travis-ci.org/novapost/python-pussycache.png?branch=master)](https://travis-ci.org/novapost/python-pussycache)
[![python-pussycache](https://pypip.in/v/pussycache/badge.png)](https://crate.io/packages/pussycache/)
[![python-pussycache](https://pypip.in/d/pussycache/badge.png)](https://crate.io/packages/pussycache/)


Here is an example to make the thing clearer

```python
import time
from pussycache.proxy import BaseProxy
from pussycache.cache import BaseCacheBackend
# Here is a simple class where some methods need to be cached

class MyClass(object):

def a_long_task(self, delta):
time.sleep(delta)
return delta

def forget_about_time(self):
return None

# We set an in memory cache backend with a TTL of 30 seconds.

cache = BaseCacheBackend(30)

cache_proxy = BaseProxy(MyClass(), cache=cache,
cached_methods=["a_long_task"],
invalidate_methods={"forget_about_time": ["a_long_task"]})

cachedinstance = cache_proxy
# your cachedinstance is now
# ready to use. It will just work like a regular MyClass object

print cachedinstance.a_long_task(10)
# 10 seconds later
10
# if we call the same method a second time:
print cachedinstance.a_long_task(10)
10
# result is returned immediatly because it's in the cache
# but
print cachedinstance.a_long_task(3)
3
# with different parameters, the result is not cached yet.
# if you want to invalidate the cache for this method:
print cachedinstance.forget_about_time()
print cachedinstance.a_long_task(10)
# 10 seconds later
10
```

Of course, If you need direct access to the cache backend, you can
call it directly. Let's say you need to invalidate ALL the cache :

```python

cachedinstance._cache.clear()
```

The same apply if you need to call directly the cache:

```python
cachedinstance.\_cache.set("mykey", "my value", 10)
cachedinstance.\_cache.get("mykey")
"my value"
#and 10 seconds later:
cachedinstance.\_cache.get("mykey")
#the value is gone from the cache
```


Tests
-----

To run test, just install tox with ``pip install tox`` and run

tox

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

pussycache-1.4.zip (12.4 kB view details)

Uploaded Source

File details

Details for the file pussycache-1.4.zip.

File metadata

  • Download URL: pussycache-1.4.zip
  • Upload date:
  • Size: 12.4 kB
  • Tags: Source
  • Uploaded using Trusted Publishing? No

File hashes

Hashes for pussycache-1.4.zip
Algorithm Hash digest
SHA256 71e6774f2064b147834ee64c264dc63b4bf884b95229214a9c5ab7ccaeac6e7d
MD5 063ce4debf702cd8adf04c7306cccc0a
BLAKE2b-256 c1f0806a7b6dc0c2953689afc124e01c5cab4331f20e19073b012d24487e4d7a

See more details on using hashes here.

Provenance

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page