coredis 3.9.3

Python async client for Redis key-value store

coredis

coredis is an async redis client with support for redis server, cluster & sentinel.

• Installation
• Feature Summary
  • Deployment topologies
  • Application patterns
  • Server side scripting
  • Miscellaneous
• Quick start
  • Single Node client
  • Cluster client
• Compatibility
  • Supported python versions
• Experimental Backends
• References

Installation

To install coredis:

$ pip install coredis

Feature Summary

Deployment topologies

• Redis Cluster
• Sentinel

Application patterns

• PubSub
• Sharded PubSub [>= Redis 7.0]
• Stream Consumers
• Pipelining
• Client side caching

Server side scripting

• LUA Scripting
• Redis Libraries and functions [>= Redis 7.0]

Miscellaneous

• RESP3 Protocol Support
• Public API annotated with type annotations
• Optional Runtime Type Validation (via beartype)

Quick start

Single Node client

import asyncio
from coredis import Redis

async def example():
    client = Redis(host='127.0.0.1', port=6379, db=0)
    await client.flushdb()
    await client.set('foo', 1)
    assert await client.exists(['foo']) == 1
    await client.incr('foo')
    await client.incrby('foo', increment=100)

    assert int(await client.get('foo')) == 102
    await client.expire('foo', 1)
    await asyncio.sleep(0.1)
    await client.ttl('foo')
    await asyncio.sleep(1)
    assert not await client.exists(['foo'])

asyncio.run(example())

Cluster client

import asyncio
from coredis import RedisCluster

async def example():
    client = RedisCluster(host='172.17.0.2', port=7001)
    await client.flushdb()
    await client.set('foo', 1)
    await client.lpush('a', [1])
    print(await client.cluster_slots())

    await client.rpoplpush('a', 'b')
    assert await client.rpop('b') == b'1'

asyncio.run(example())
# {(10923, 16383): [{'host': b'172.17.0.2', 'node_id': b'332f41962b33fa44bbc5e88f205e71276a9d64f4', 'server_type': 'master', 'port': 7002},
# {'host': b'172.17.0.2', 'node_id': b'c02deb8726cdd412d956f0b9464a88812ef34f03', 'server_type': 'slave', 'port': 7005}],
# (5461, 10922): [{'host': b'172.17.0.2', 'node_id': b'3d1b020fc46bf7cb2ffc36e10e7d7befca7c5533', 'server_type': 'master', 'port': 7001},
# {'host': b'172.17.0.2', 'node_id': b'aac4799b65ff35d8dd2ad152a5515d15c0dc8ab7', 'server_type': 'slave', 'port': 7004}],
# (0, 5460): [{'host': b'172.17.0.2', 'node_id': b'0932215036dc0d908cf662fdfca4d3614f221b01', 'server_type': 'master', 'port': 7000},
# {'host': b'172.17.0.2', 'node_id': b'f6603ab4cb77e672de23a6361ec165f3a1a2bb42', 'server_type': 'slave', 'port': 7003}]}

To see a full list of supported redis commands refer to the Command compatibility documentation

Compatibility

coredis is tested against redis versions 6.0.x, 6.2.x & 7.0.x. The test matrix status can be reviewed here

coredis is additionally tested against:

• hiredis >= 2.0.0
• uvloop >= 0.15.0

hiredis if available will be used by default as the RESP (or RESP3) parser as it provides significant performance gains in response parsing. For more details refer to the the documentation section on Parsers

Supported python versions

• 3.8
• 3.9
• 3.10

Experimental Backends

coredis has experimental support for the following redis compatible backends:

• KeyDB
• Dragonfly

References

• Documentation (Stable)
• Documentation (Latest)
• Changelog
• Project History