asyncio (PEP 3156) Redis support
Project description
asyncio (PEP 3156) Redis client library.
Features
hiredis parser |
Yes |
Pure-python parser |
Yes |
Low-level & High-level APIs |
Yes |
Connections Pool |
Yes |
Pipelining support |
Yes |
Pub/Sub support |
Yes |
SSL/TLS support |
Yes |
Sentinel support |
Yes |
Redis Cluster support |
WIP |
Trollius (python 2.7) |
No |
Tested CPython versions |
|
Tested PyPy3 versions |
|
Tested for Redis server |
|
Support for dev Redis server |
through low-level API |
Documentation
Usage examples
Simple low-level interface:
import asyncio
import aioredis
loop = asyncio.get_event_loop()
async def go():
conn = await aioredis.create_connection(
'redis://localhost', loop=loop)
await conn.execute('set', 'my-key', 'value')
val = await conn.execute('get', 'my-key')
print(val)
conn.close()
await conn.wait_closed()
loop.run_until_complete(go())
# will print 'value'
Simple high-level interface:
import asyncio
import aioredis
loop = asyncio.get_event_loop()
async def go():
redis = await aioredis.create_redis(
'redis://localhost', loop=loop)
await redis.set('my-key', 'value')
val = await redis.get('my-key')
print(val)
redis.close()
await redis.wait_closed()
loop.run_until_complete(go())
# will print 'value'
Connections pool:
import asyncio
import aioredis
loop = asyncio.get_event_loop()
async def go():
pool = await aioredis.create_pool(
'redis://localhost',
minsize=5, maxsize=10,
loop=loop)
await pool.execute('set', 'my-key', 'value')
print(await pool.execute('get', 'my-key'))
# graceful shutdown
pool.close()
await pool.wait_closed()
loop.run_until_complete(go())
Simple high-level interface with connections pool:
import asyncio
import aioredis
loop = asyncio.get_event_loop()
async def go():
redis = await aioredis.create_redis_pool(
'redis://localhost',
minsize=5, maxsize=10,
loop=loop)
await redis.set('my-key', 'value')
val = await redis.get('my-key')
print(val)
redis.close()
await redis.wait_closed()
loop.run_until_complete(go())
# will print 'value'
Requirements
Note
hiredis is preferred requirement. Pure-python protocol parser is implemented as well and can be used through parser parameter.
Benchmarks
Benchmarks can be found here: https://github.com/popravich/python-redis-benchmark
Discussion list
aio-libs google group: https://groups.google.com/forum/#!forum/aio-libs
Or gitter room: https://gitter.im/aio-libs/Lobby
License
The aioredis is offered under MIT license.
Changes
1.2.0 (2018-10-24)
NEW:
Implemented new Stream command support (see #299);
Reduce encode_command() cost about 60% (see #397);
FIX:
Fix pipeline commands buffering was causing multiple sendto syscalls (see #464 and #473);
Python 3.7 compatibility fixes (see #426);
Fix typos in documentation (see #400);
Fix INFO command result parsing (see #405);
Fix bug in ConnectionsPool._drop_closed method (see #461);
MISC:
Update dependencies versions;
Multiple tests improvements;
1.1.0 (2018-02-16)
NEW:
Implement new commands: wait, touch, swapdb, unlink (see #376);
Add async_op argument to flushall and flushdb commands (see #364, and #370);
FIX:
Important! Fix Sentinel sentinel client with pool minsize greater than 1 (see #380);
Fix SentinelPool.discover_timeout usage (see #379);
Fix an issue with subscribe/psubscribe with empty pool (see #351, and #355);
Fix an issue when StreamReader’s feed_data is called before set_parser (see #347);
MISC:
Update dependencies versions;
Multiple test fixes;
1.0.0 (2017-11-17)
NEW:
Important! Drop Python 3.3, 3.4 support; (see #321, #323 and #326);
Important! Connections pool has been refactored; now create_redis function will yield Redis instance instead of RedisPool (see #129);
Important! Change sorted set commands reply format: return list of tuples instead of plain list for commands accepting withscores argument (see #334);
Important! Change hscan command reply format: return list of tuples instead of mixed key-value list (see #335);
Implement Redis URI support as supported address argument value (see #322);
Dropped create_reconnecting_redis, create_redis_pool should be used instead;
Implement custom StreamReader (see #273);
Implement Sentinel support (see #181);
Implement pure-python parser (see #212);
Add migrate_keys command (see #187);
Add zrevrangebylex command (see #201);
Add command, command_count, command_getkeys and command_info commands (see #229);
Add ping support in pubsub connection (see #264);
Add exist parameter to zadd command (see #288);
Add MaxClientsError and implement ReplyError specialization (see #325);
Add encoding parameter to sorted set commands (see #289);
FIX:
Fix CancelledError in conn._reader_task (see #301);
Fix pending commands cancellation with CancelledError, use explicit exception instead of calling cancel() method (see #316);
Correct error message on Sentinel discovery of master/slave with password (see #327);
Fix bytearray support as command argument (see #329);
Fix critical bug in patched asyncio.Lock (see #256);
Fix Multi/Exec transaction canceled error (see #225);
Add missing arguments to create_redis and create_redis_pool;
Fix deprecation warning (see #191);
Make correct __aiter__() (see #192);
Backward compatibility fix for with (yield from pool) as conn: (see #205);
Fixed pubsub receiver stop() (see #211);
MISC:
Multiple test fixes;
Add PyPy3 to build matrix;
Update dependencies versions;
Add missing Python 3.6 classifier;
0.3.5 (2017-11-08)
FIX:
Fix for indistinguishable futures cancellation with asyncio.CancelledError (see #316), cherry-picked from master;
0.3.4 (2017-10-25)
FIX:
Fix time command result decoding when using connection-wide encoding setting (see #266);
0.3.3 (2017-06-30)
FIX:
Critical bug fixed in patched asyncio.Lock (see #256);
0.3.2 (2017-06-21)
NEW:
Added zrevrangebylex command (see #201), cherry-picked from master;
Add connection timeout (see #221), cherry-picked from master;
FIX:
0.3.1 (2017-05-09)
FIX:
Fix pubsub Receiver missing iter() method (see #203);
0.3.0 (2017-01-11)
NEW:
Pub/Sub connection commands accept Channel instances (see #168);
Implement new Pub/Sub MPSC (multi-producers, single-consumer) Queue – aioredis.pubsub.Receiver (see #176);
Add aioredis.abc module providing abstract base classes defining interface for basic lib components; (see #176);
FIX:
Minor tests fixes;
MISC:
0.2.9 (2016-10-24)
NEW:
FIX:
Close RedisPool when connection to Redis failed (see #136);
Add simple INFO command argument validation (see #140);
Remove invalid uses of next()
MISC:
Update devel.rst docs; update Pub/Sub Channel docs (cross-refs);
Update MANIFEST.in to include docs, examples and tests in source bundle;
0.2.8 (2016-07-22)
NEW:
Add hmset_dict command (see #130);
Add RedisConnection.address property;
RedisPool minsize/maxsize must not be None;
Implement close()/wait_closed()/closed interface for pool (see #128);
FIX:
Add test for hstrlen;
Test fixes
MISC:
Enable Redis 3.2.0 on Travis;
Add spell checking when building docs (see #132);
Documentation updated;
0.2.7 (2016-05-27)
create_pool() minsize default value changed to 1;
Fixed cancellation of wait_closed (see #118);
Fixed time() convertion to float (see #126);
Fixed hmset() method to return bool instead of b'OK' (see #126);
Fixed multi/exec + watch issue (changed watch variable was causing tr.execute() to fail) (see #121);
Replace asyncio.Future uses with utility method (get ready to Python 3.5.2 loop.create_future());
Tests switched from unittest to pytest (see #126);
Documentation updates;
0.2.6 (2016-03-30)
Fixed Multi/Exec transactions cancellation issue (see #110 and #114);
Fixed Pub/Sub subscribe concurrency issue (see #113 and #115);
Add SSL/TLS support (see #116);
aioredis.ConnectionClosedError raised in execute_pubsub as well (see #108);
Redis.slaveof() method signature changed: now to disable replication one should call redis.slaveof(None) instead of redis.slaveof();
More tests added;
0.2.5 (2016-03-02)
Close all Pub/Sub channels on connection close (see #88);
Add iter() method to aioredis.Channel allowing to use it with async for (see #89);
Inline code samples in docs made runnable and downloadable (see #92);
Python 3.5 examples converted to use async/await syntax (see #93);
Fix Multi/Exec to honor encoding parameter (see #94 and #97);
Add debug message in create_connection (see #90);
Replace asyncio.async calls with wrapper that respects asyncio version (see #101);
Use NODELAY option for TCP sockets (see #105);
New aioredis.ConnectionClosedError exception added. Raised if connection to Redis server is lost (see #108 and #109);
Fix RedisPool to close and drop connection in subscribe mode on release;
Fix aioredis.util.decode to recursively decode list responses;
More examples added and docs updated;
Add google groups link to README;
Bump year in LICENSE and docs;
0.2.4 (2015-10-13)
Python 3.5 async support:
New scan commands API (iscan, izscan, ihscan);
Pool made awaitable (allowing with await pool: ... and async with pool.get() as conn: constructs);
Fixed dropping closed connections from free pool (see #83);
Docs updated;
0.2.3 (2015-08-14)
0.2.2 (2015-07-07)
Decoding data with encoding parameter now takes into account list (array) replies (see #68);
encoding parameter added to following commands:
generic commands: keys, randomkey;
hash commands: hgetall, hkeys, hmget, hvals;
list commands: blpop, brpop, brpoplpush, lindex, lpop, lrange, rpop, rpoplpush;
set commands: smembers, spop, srandmember;
string commands: getrange, getset, mget;
Backward incompatibility:
ltrim command now returns bool value instead of ‘OK’;
Tests updated;
0.2.1 (2015-07-06)
Logging added (aioredis.log module);
Fixed issue with wait_message in pub/sub (see #66);
0.2.0 (2015-06-04)
Pub/Sub support added;
Fix in zrevrangebyscore command (see #62);
Fixes/tests/docs;
0.1.5 (2014-12-09)
AutoConnector added;
wait_closed method added for clean connections shutdown;
zscore command fixed;
Test fixes;
0.1.4 (2014-09-22)
Dropped following Redis methods – Redis.multi(), Redis.exec(), Redis.discard();
Redis.multi_exec hack’ish property removed;
Redis.multi_exec() method added;
High-level commands implemented:
generic commands (tests);
transactions commands (api stabilization).
Backward incompatibilities:
Following sorted set commands’ API changed:
zcount, zrangebyscore, zremrangebyscore, zrevrangebyscore;
set string command’ API changed;
0.1.3 (2014-08-08)
RedisConnection.execute refactored to support commands pipelining (see #33);
Several fixes;
WIP on transactions and commands interface;
High-level commands implemented and tested:
hash commands;
hyperloglog commands;
set commands;
scripting commands;
string commands;
list commands;
0.1.2 (2014-07-31)
0.1.1 (2014-07-07)
Transactions support (in connection, high-level commands have some issues);
Docs & tests updated.
0.1.0 (2014-06-24)
Initial release;
RedisConnection implemented;
RedisPool implemented;
Docs for RedisConnection & RedisPool;
WIP on high-level API.
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