Set of basic Python collections backed by Redis.
Project description
redis-collections is a Python library that provides a high-level interface to Redis, the excellent key-value store.
Quickstart
Install the library with pip install redis-collections. Import the collections from the top-level redis_collections package.
Standard collections
The standard collections (e.g. Dict, List, Set) behave like their Python counterparts:
>>> from redis_collections import Dict, List, Set
>>> D = Dict()
>>> D['answer'] = 42
>>> D['answer']
42Collection |
Redis type |
Description |
|---|---|---|
Dict |
Hash |
Emulates Python’s dict |
List |
List |
Emulates Python’s list |
Set |
Set |
Emulates Python’s set |
Counter |
Hash |
Emulates Python’s collections.Counter |
DefaultDict |
Hash |
Emulates Python’s collections.defaultdict |
Deque |
List |
Emulates Python’s collections.deque |
Syncable collections
The syncable collections in this package provide types whose contents are kept in memory. When their sync method is called those contents are written to Redis:
>>> from redis_collections import SyncableDict
>>> with SyncableDict() as D:
... D['a'] = 1 # No write to Redis
... D['a'] += 1 # No read from or write to Redis
>>> D['a'] # D.sync() is called at the end of the with block
2Collection |
Python type |
Description |
|---|---|---|
SyncableDict |
dict |
Syncs to a Redis Hash |
SyncableList |
list |
Syncs to a Redis List |
SyncableSet |
set |
Syncs to a Redis Set |
SyncableCounter |
collections.Counter |
Syncs to a Redis Hash |
SyncableDeque |
collections.deque |
Syncs to a Redis List |
SyncableDefaultDict |
collections.defaultdict |
Syncs to a Redis Hash |
Other collections
The LRUDict collection stores recently used items in in memory. It pushes older items to Redis:
>>> from redis_collections import LRUDict
>>> D = LRUDict(maxsize=2)
>>> D['a'] = 1
>>> D['b'] = 2
>>> D['c'] = 2 # 'a' is pushed to Redis and 'c' is stored locally
>>> D['a'] # 'b' is pushed to Redis and 'a' is retrieved for local storage
1
>>> D.sync() # All items are copied to RedisThe SortedSetCounter provides access to the Redis Sorted Set type:
>>> from redis_collections import SortedSetCounter
>>> ssc = SortedSetCounter([('earth', 300), ('mercury', 100)])
>>> ssc.set_score('venus', 200)
>>> ssc.get_score('venus')
200.0
>>> ssc.items()
[('mercury', 100.0), ('venus', 200.0), ('earth', 300.0)]Documentation
For more information, see redis-collections.readthedocs.io
Maintainers
Bo Bayles (@bbayles)
Honza Javorek (@honzajavorek)
License: ISC
© 2013-? Honza Javorek <mail@honzajavorek>
This work is licensed under ISC license.
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