Flask python - Import redis from config file

Question

I have 2 environment and one of the environment is clusterdisabled, the other is cluster enabled. To handle this, i added a key in config For one of the environment it's

redis_class = "Redis"

The other environment has

redis_class = "RedisCluster"

init.py

 from myapp.config import config
 #this printed the value 
 print(config["redis_class")
 redis_class = config["redis_class"]
 from redis import redis_class as Redis

The last line in init.py is throwing an error. How do I import classes from config?

Thanks in advance

Answer 1

You can try out something like this,

redis_class = config["redis_class"]
if redis_class == 'Redis':
    from redis import Redis
else:
    from redis import RedisCluster as Redis

or keep the above code in another file(config.py) and in your main file you can import it directly.

like from config import Redis

---

Without using if-condition you can try with getattr like this

import redis

redis_class = config["redis_class"]
Redis = getattr(redis, redis_class) 

# use the redis class as normal
Redis(...)

Answer 2

__import__("redis", fromlist=["RedisCluster"])