redislite 1.0.254

Redis built into a python package

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Description

Self contained Python interface to the Redis key-value store.

It makes it possible to use Redis without the need to install and configure a redis server.

Requirements

The redislite module requires Python 2.7 or higher.

Make sure Python development headers are available when installing redislite.

On Ubuntu/Debian systems, install them with:

apt-get install python-dev

On Redhat/Fedora systems, install them with:

yum install python-devel

On Mac OSX you may need the XCode command line utilities installed. If you do not have xcode installed on recent OSX releases they can be installed by running:

xcode-select --install

Note redislite and its dependencies use the gcc compiler. On OSX you may run into errors indicating that your machine is using clang to compile instead, for example:

clang: error: unknown argument: '-mno-fused-madd' [-Wunused-command-line-argument-hard-error-in-future]

If this is the case, set your environment variable to override the use of clang in favor of gcc:

CC=gcc

Installation

To install redislite, simply:

$ pip install redislite

or using easy_install:

$ easy_install redislite

or from source:

$ python setup.py install

Getting Started

>>> import redislite
>>> r = redislite.StrictRedis()
>>> r.set('foo', 'bar')
True
>>> r.get('foo')
'bar'

Usage

redislite provides enhanced versions of the redis.Redis() and redis.StrictRedis() classes that take the same arguments as the corresponding redis classes and take one additional optional argument. Which is the name of the Redis rdb file to use. If the argument is not provided it will create a new one.

redislite also provides functions to MonkeyPatch the redis.Redis and redis.StrictRedis classes to use redislite, so existing python code that uses Redis can use the redislite version.

Example

Here we open a Python shell and set a key in our embedded Redis db

>>> from redislite import Redis
>>> redis_connection = Redis('/tmp/redis.db')
>>> redis_connection.keys()
[]
>>> redis_connection.set('key', 'value')
True
>>> redis_connection.get('key')
'value'

Here we open the same Redis db and access the key we created during the last run

>>> from redislite import Redis
>>> redis_connection = Redis('/tmp/redis.db')
>>> redis_connection.keys()
['key']
>>> redis_connection.get('key')
'value'

It’s also possible to MonkeyPatch the normal Redis classes to allow modules that use Redis to use the redislite classes. Here we patch Redis and use the redis_collections module.

>>> import redislite.patch
>>> redislite.patch.patch_redis()
>>> import redis_collections
>>> td = redis_collections.Dict()
>>> td['foo']='bar'
>>> td.keys()
['foo']

Finally it’s possible ot spin up multiple instances with different configuration values for the Redis server. Here is an example that sets up 2 redis instances. One instance is configured to listen on port 8002, the second instance is a slave of the first instance.

Python 2.7.6 (default, Mar 22 2014, 22:59:56)
[GCC 4.8.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import redislite
>>> master=redislite.Redis(serverconfig={'port': '8002'})
>>> slave=redislite.Redis(serverconfig={'slaveof': "127.0.0.1 8002"})
>>> slave.keys()
[]
>>> master.set('key', 'value')
True
>>> master.keys()
['key']
>>> slave.keys()
['key']
>>>

More Information

There is more detailed information on the redislite documentation page at http://redislite.readthedocs.org/en/latest/

Redislite is Free software under the New BSD license, see LICENSE.txt for details.