python redis 101

docker-compose.yml

  redis:
    image: redis
    
  web:
    build: .
    environment:
      # Points to docker hostname redis (from servicename above)
      REDIS_URL: "redis://redis/0"

redis.py

import redis
from magicenv import env

# Get Redis URL from environment - points to default db 0.
REDIS_URL = env('REDIS_URL', "redis://127.0.0.1/0")


cache = redis.from_url(redis_url)

# write:
cache.set('foo', 'bar')

# read:
value = cache.get('foo')

if value is None:
    print("Key is missing from cache")