webapp/app/core/redis.py

from typing import Optional
from redis.asyncio import Redis
from app.core.config import settings

_redis_client: Optional[Redis] = None

async def get_redis_client() -> Redis:
    global _redis_client
    if _redis_client is None:
        _redis_client = Redis.from_url(
            settings.redis_url,
            decode_responses=True
        )
    return _redis_client