kv-store-py 0.0.4

A simple wrapper for key-value stores supporting Python dict, Redis, Valkey, Memcached, and SQLite and other backend clients.

kv-store

A unified async interface for key-value stores in Python. Write your caching logic once, swap backends without changing code.

Installation

pip install kv-store-py

Or with uv:

uv add kv-store-py

For Redis support:

pip install kv-store-py redis

Quick Start

import asyncio
from kv_store import RedisStore

async def main():
    # Simple: create from URL with automatic resource management
    async with await RedisStore.from_url("redis://localhost:6379/0") as store:
        await store.set("user:1", {"name": "Alice", "email": "[e-mail]"}, ttl=3600)
        user = await store.get("user:1")
        print(user)  # {'name': 'Alice', 'email': '[e-mail]'}

asyncio.run(main())

Alternative: Inject Your Own Client

from redis.asyncio import Redis
from kv_store import RedisStore

async def main():
    # Advanced: manage the Redis client yourself
    client = Redis(host="localhost", port=6379)
    store = RedisStore(client)

    await store.set("key", "value", ttl=3600)

    # You manage the client lifecycle
    await client.aclose()

API Reference

All store implementations share the same async interface:

Single Key Operations

# Get a value (returns default if key doesn't exist or is expired)
value = await store.get(key: str, default: Any = None) -> Any

# Set a value with TTL in seconds
success = await store.set(key: str, value: Any, ttl: int) -> bool

# Delete a key
existed = await store.delete(key: str) -> bool

Batch Operations

# Get multiple keys at once
results = await store.get_many(
    keys: list[str],
    default: Any = None  # Single value or list of defaults per key
) -> dict[str, Any]

# Set multiple keys atomically
results = await store.set_many(items: dict[str, Any], ttl: int) -> dict[str, bool]

# Delete multiple keys
count = await store.delete_many(keys: list[str]) -> int

Distributed Locking (Redis only)

# Acquire a lock for mutual exclusion
async with store.lock("resource:id", timeout=30, blocking_timeout=10):
    # Critical section - only one process can execute this
    await perform_exclusive_operation()

Supported Backends

Backend	Status	Class
Redis	Available	RedisStore
In-Memory	Available	InMemoryStore
Valkey	Planned	-
SQLite	Planned	-
PostgreSQL	Planned	-
MySQL	Planned	-

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

MIT License - see LICENSE for details.