Redis client for Python asyncio (PEP 3156)

Overview

Redis client for Python asyncio.

Build Status

Redis client for the PEP 3156 Python event loop.

This Redis library is a completely asynchronous, non-blocking client for a Redis server. It depends on asyncio (PEP 3156) and requires Python 3.6 or greater. If you're new to asyncio, it can be helpful to check out the asyncio documentation first.

Maintainers needed!

Right now, this library is working fine, but not actively maintained, due to lack of time and shift of priorities on my side (Jonathan). Most of my time doing open source goes to prompt_toolkt community.

I still merge pull request when they are fine, especially for bug/security fixes. But for a while now, we don't have new features. If you are already using it, then there's not really a need to worry, asyncio-redis will keep working fine, and we fix bugs, but it's not really evolving.

If anyone is interested to seriously take over development, please let me know. Also keep in mind that there is a competing library called aioredis, which does have a lot of activity.

See issue https://github.com/jonathanslenders/asyncio-redis/issues/134 to discuss.

Features

  • Works for the asyncio (PEP3156) event loop
  • No dependencies except asyncio
  • Connection pooling
  • Automatic conversion from unicode (Python) to bytes (inside Redis.)
  • Bytes and str protocols.
  • Completely tested
  • Blocking calls and transactions supported
  • Streaming of some multi bulk replies
  • Pubsub support

Trollius support: There is a fork by Ben Jolitz that has the necessary changes for using this asyncio-redis library with Trollius.

Installation

pip install asyncio_redis

Documentation

View documentation at read-the-docs

The connection class

A asyncio_redis.Connection instance will take care of the connection and will automatically reconnect, using a new transport when the connection drops. This connection class also acts as a proxy to a asyncio_redis.RedisProtocol instance; any Redis command of the protocol can be called directly at the connection.

import asyncio
import asyncio_redis


async def example():
    # Create Redis connection
    connection = await asyncio_redis.Connection.create(host='localhost', port=6379)

    # Set a key
    await connection.set('my_key', 'my_value')

    # When finished, close the connection.
    connection.close()


if __name__ == '__main__':
    loop = asyncio.get_event_loop()
    loop.run_until_complete(example())

Connection pooling

Requests will automatically be distributed among all connections in a pool. If a connection is blocking because of --for instance-- a blocking rpop, another connection will be used for new commands.

import asyncio
import asyncio_redis


async def example():
    # Create Redis connection
    connection = await asyncio_redis.Pool.create(host='localhost', port=6379, poolsize=10)

    # Set a key
    await connection.set('my_key', 'my_value')

    # When finished, close the connection pool.
    connection.close()

Transactions example

import asyncio
import asyncio_redis


async def example(loop):
    # Create Redis connection
    connection = await asyncio_redis.Pool.create(host='localhost', port=6379, poolsize=10)

    # Create transaction
    transaction = await connection.multi()

    # Run commands in transaction (they return future objects)
    f1 = await transaction.set('key', 'value')
    f2 = await transaction.set('another_key', 'another_value')

    # Commit transaction
    await transaction.exec()

    # Retrieve results
    result1 = await f1
    result2 = await f2

    # When finished, close the connection pool.
    connection.close()

It's recommended to use a large enough poolsize. A connection will be occupied as long as there's a transaction running in there.

Pubsub example

import asyncio
import asyncio_redis

async def example():
    # Create connection
    connection = await asyncio_redis.Connection.create(host='localhost', port=6379)

    # Create subscriber.
    subscriber = await connection.start_subscribe()

    # Subscribe to channel.
    await subscriber.subscribe([ 'our-channel' ])

    # Inside a while loop, wait for incoming events.
    while True:
        reply = await subscriber.next_published()
        print('Received: ', repr(reply.value), 'on channel', reply.channel)

    # When finished, close the connection.
    connection.close()

LUA Scripting example

import asyncio
import asyncio_redis

code = \
"""
local value = redis.call('GET', KEYS[1])
value = tonumber(value)
return value * ARGV[1]
"""


async def example():
    connection = await asyncio_redis.Connection.create(host='localhost', port=6379)

    # Set a key
    await connection.set('my_key', '2')

    # Register script
    multiply = await connection.register_script(code)

    # Run script
    script_reply = await multiply.run(keys=['my_key'], args=['5'])
    result = await script_reply.return_value()
    print(result) # prints 2 * 5

    # When finished, close the connection.
    connection.close()

Example using the Protocol class

import asyncio
import asyncio_redis


async def example():
    loop = asyncio.get_event_loop()

    # Create Redis connection
    transport, protocol = await loop.create_connection(
                asyncio_redis.RedisProtocol, 'localhost', 6379)

    # Set a key
    await protocol.set('my_key', 'my_value')

    # Get a key
    result = await protocol.get('my_key')
    print(result)

    # Close transport when finished.
    transport.close()

if __name__ == '__main__':
    asyncio.get_event_loop().run_until_complete(example())
Owner
Jonathan Slenders
Author of prompt_toolkit.
Jonathan Slenders
A SQL linter and auto-formatter for Humans

The SQL Linter for Humans SQLFluff is a dialect-flexible and configurable SQL linter. Designed with ELT applications in mind, SQLFluff also works with

SQLFluff 5.5k Jan 08, 2023
A Python Object-Document-Mapper for working with MongoDB

MongoEngine Info: MongoEngine is an ORM-like layer on top of PyMongo. Repository: https://github.com/MongoEngine/mongoengine Author: Harry Marr (http:

MongoEngine 3.9k Jan 08, 2023
MySQL database connector for Python (with Python 3 support)

mysqlclient This project is a fork of MySQLdb1. This project adds Python 3 support and fixed many bugs. PyPI: https://pypi.org/project/mysqlclient/ Gi

PyMySQL 2.2k Dec 25, 2022
A wrapper for SQLite and MySQL, Most of the queries wrapped into commands for ease.

Before you proceed, make sure you know Some real SQL, before looking at the code, otherwise you probably won't understand anything. Installation pip i

Refined 4 Jul 30, 2022
MongoX is an async python ODM for MongoDB which is built on top Motor and Pydantic.

MongoX MongoX is an async python ODM (Object Document Mapper) for MongoDB which is built on top Motor and Pydantic. The main features include: Fully t

Amin Alaee 112 Dec 04, 2022
A Telegram Bot to manage Redis Database.

A Telegram Bot to manage Redis database. Direct deploy on heroku Manual Deployment python3, git is required Clone repo git clone https://github.com/bu

Amit Sharma 4 Oct 21, 2022
python-beryl, a Python driver for BerylDB.

python-beryl, a Python driver for BerylDB.

BerylDB 3 Nov 24, 2021
PostgreSQL database access simplified

Queries: PostgreSQL Simplified Queries is a BSD licensed opinionated wrapper of the psycopg2 library for interacting with PostgreSQL. The popular psyc

Gavin M. Roy 251 Oct 25, 2022
MariaDB connector using python and flask

MariaDB connector using python and flask This should work with flask and to be deployed on docker. Setting up stuff 1. Docker build and run docker bui

Bayangmbe Mounmo 1 Jan 11, 2022
Monty, Mongo tinified. MongoDB implemented in Python !

Monty, Mongo tinified. MongoDB implemented in Python ! Inspired by TinyDB and it's extension TinyMongo. MontyDB is: A tiny version of MongoDB, against

David Lai 522 Jan 01, 2023
Sample code to extract data directly from the NetApp AIQUM MySQL Database

This sample code shows how to connect to the AIQUM Database and pull user quota details from it. AIQUM Requirements: 1. AIQUM 9.7 or higher. 2. An

1 Nov 08, 2021
Easy-to-use data handling for SQL data stores with support for implicit table creation, bulk loading, and transactions.

dataset: databases for lazy people In short, dataset makes reading and writing data in databases as simple as reading and writing JSON files. Read the

Friedrich Lindenberg 4.2k Jan 02, 2023
This is a repository for a task assigned to me by Bilateral solutions!

Processing-Files-using-MySQL This is a repository for a task assigned to me by Bilateral solutions! Task: Make Folders named Processing,queue and proc

Kandal Khandeka 1 Nov 07, 2022
#crypto #cipher #encode #decode #hash

🌹 CYPHER TOOLS 🌹 Written by TMRSWRR Version 1.0.0 All in one tools for CRYPTOLOGY. Instagram: Capture the Root 🖼️ Screenshots 🖼️ 📹 How to use 📹

50 Dec 23, 2022
Pony Object Relational Mapper

Downloads Pony Object-Relational Mapper Pony is an advanced object-relational mapper. The most interesting feature of Pony is its ability to write que

3.1k Jan 04, 2023
Asynchronous Python client for InfluxDB

aioinflux Asynchronous Python client for InfluxDB. Built on top of aiohttp and asyncio. Aioinflux is an alternative to the official InfluxDB Python cl

Gustavo Bezerra 159 Dec 27, 2022
A Python-based RPC-like toolkit for interfacing with QuestDB.

pykit A Python-based RPC-like toolkit for interfacing with QuestDB. Requirements Python 3.9 Java Azul

QuestDB 11 Aug 03, 2022
A database migrations tool for SQLAlchemy.

Alembic is a database migrations tool written by the author of SQLAlchemy. A migrations tool offers the following functionality: Can emit ALTER statem

SQLAlchemy 1.7k Jan 01, 2023
Makes it easier to write raw SQL in Python.

CoolSQL Makes it easier to write raw SQL in Python. Usage Quick Start from coolsql import Field name = Field("name") age = Field("age") condition =

Aber 7 Aug 21, 2022
A tiny python web application based on Flask to set, get, expire, delete keys of Redis database easily with direct link at the browser.

First Redis Python (CRUD) A tiny python web application based on Flask to set, get, expire, delete keys of Redis database easily with direct link at t

Max Base 9 Dec 24, 2022