redis-py : What's the difference between StrictRedis() and Redis()?
PythonRedisPython Problem Overview
I want to use redis-py for caching some data, but I can't find a suitable explanation of the difference between redis.StrictRedis() and redis.Redis(). Are they equivalent?
In addition, I can't find any clear documentation about redis.StrictRedis()'s arguments in Redis Python Docs.
Any idea?
Python Solutions
Solution 1 - Python
EDIT: They are now equivalent:
> redis-py 3.0 drops support for the legacy "Redis" client class. > "StrictRedis" has been renamed to "Redis" and an alias named > "StrictRedis" is provided so that users previously using "StrictRedis" > can continue to run unchanged.
Original answer: This seems pretty clear:
redis-py exposes two client classes that implement these commands
The StrictRedis class attempts to adhere to the official command syntax.
and
In addition to the changes above, the Redis class, a subclass of StrictRedis,
overrides several other commands to provide backwards compatibility with older
versions of redis-py
Do you need backwards compatibility? Use Redis. Don't care? Use StrictRedis.
2017-03-31
Here are the specifics of the backwards compatibility, from the github.com link cited:
> In addition to the changes above, the Redis class, a subclass of StrictRedis, overrides several other commands to provide backwards compatibility with older versions of redis-py: > > LREM: Order of 'num' and 'value' arguments reversed such that 'num' can provide a default value of zero. > > ZADD: Redis specifies the 'score' argument before 'value'. These were swapped accidentally when being implemented and not discovered until after people were already using it. The Redis class expects *args in the form of: name1, score1, name2, score2, ... > > SETEX: Order of 'time' and 'value' arguments reversed.
Solution 2 - Python
It's an old question but for anyone who reaches this question after google search:
from redis-py readme (link):
> redis-py 3.0 drops support for the legacy "Redis" client class. > "StrictRedis" has been renamed to "Redis" and an alias named > "StrictRedis" is provided so that users previously using "StrictRedis" > can continue to run unchanged.
Here is the line from redis-py code which defines StrictRedis (link):
StrictRedis = Redis