A dict-like SQLite wrapper with APSW for instant persistence and memory caching
Project description
NanaSQLite
A dict-like SQLite wrapper with instant persistence and intelligent caching.
English
🚀 Features
- Dict-like Interface: Use familiar
db["key"] = valuesyntax - Instant Persistence: All writes are immediately saved to SQLite
- Smart Caching: Lazy load (on-access) or bulk load (all at once)
- Nested Structures: Full support for nested dicts and lists (up to 30+ levels)
- High Performance: WAL mode, mmap, and batch operations for maximum speed
- Security & Stability (v1.2.0): SQL validation, ReDoS protection, and strict connection management
- Zero Configuration: Works out of the box with sensible defaults
📦 Installation
pip install nanasqlite
Optional installation extras:
# Performance boosters (orjson + lru-dict)
pip install "nanasqlite[speed]"
# Enable encryption features (AES-GCM/ChaCha20/Fernet)
pip install "nanasqlite[encryption]"
# Install all optional runtime features
pip install "nanasqlite[all]"
# Development tools (pytest, ruff, mypy, tox, etc.)
pip install -e ".[dev]"
⚡ Quick Start
from nanasqlite import NanaSQLite
# Create or open a database
db = NanaSQLite("mydata.db")
# Use it like a dict
db["user"] = {"name": "Nana", "age": 20, "tags": ["admin", "active"]}
print(db["user"]) # {'name': 'Nana', 'age': 20, 'tags': ['admin', 'active']}
# Data persists automatically
db.close()
# Reopen later - data is still there!
db = NanaSQLite("mydata.db")
print(db["user"]["name"]) # 'Nana'
🔧 Advanced Usage
# Bulk load for faster repeated access
db = NanaSQLite("mydata.db", bulk_load=True)
# Batch operations for high-speed reads/writes
db.batch_update({"k1": "v1", "k2": "v2"})
results = db.batch_get(["k1", "k2"])
# Context manager support
with NanaSQLite("mydata.db") as db:
db["temp"] = "value"
📚 Documentation
- Official Documentation Website ↗ (Best Experience)
- English Guide
- API Reference (Sync)
- API Reference (Async)
- Benchmark Trends 📊
- Migration Guide (v1.1.x to v1.2.0)
✨ v1.3.x New Features
- Advanced Cache Strategies: LRU and TTL support. Learn more
- Data Encryption: Secure storage with AES-GCM (default), ChaCha20, or Fernet. Learn more
- Persistence TTL: Self-expiring data for sessions and temporary storage.
✨ v1.2.0 New Features
Security Enhancements & Strict Connection Management:
# v1.2.0 Security Features
db = NanaSQLite("mydata.db",
strict_sql_validation=True, # Disallow unauthorized SQL functions
max_clause_length=500 # Limit SQL length to prevent ReDoS
)
# v1.2.0 Read-Only Connection Pool (Async only)
async with AsyncNanaSQLite("mydata.db", read_pool_size=5) as db:
# Heavy read operations (query, fetch_all) use the pool automatically
# allowing parallel execution without blocking writes or other reads
results = await asyncio.gather(
db.query("logs", where="level=?", parameters=("ERROR",)),
db.query("logs", where="level=?", parameters=("INFO",)),
db.query("logs", where="level=?", parameters=("WARN",))
)
# Strict Connection Management
with db.transaction():
sub_db = db.table("sub")
# ... operations ...
db.close()
# Accessing sub_db now raises NanaSQLiteClosedError for safety!
Read Secure Development Guide ↗
✨ v1.1.0 New Features
Safely operate multiple tables in the same database with shared connections:
from nanasqlite import NanaSQLite
# Create main table instance
main_db = NanaSQLite("mydata.db", table="users")
# Get another table instance sharing the same connection
products_db = main_db.table("products")
orders_db = main_db.table("orders")
# Each table has isolated cache and operations
main_db["user1"] = {"name": "Alice", "email": "alice@example.com"}
products_db["prod1"] = {"name": "Laptop", "price": 999}
orders_db["order1"] = {"user": "user1", "product": "prod1"}
Transaction Support & Error Handling (v1.1.0+):
from nanasqlite import NanaSQLite, NanaSQLiteTransactionError
with db.transaction():
db["key1"] = "value1"
db["key2"] = "value2"
Explore Multi-table & Transactions ↗
✨ v1.0.3+ Legacy Features
Pydantic Support & Direct SQL:
# Pydantic support
db.set_model("user", User(name="Nana", age=20))
# Direct SQL execution
db.execute("SELECT * FROM data WHERE key LIKE ?", ("user%",))
# 22 new SQLite wrapper functions (sql_insert, sql_update, count, etc.)
db.sql_insert("users", {"name": "Alice", "age": 25})
日本語
🚀 特徴
- dict風インターフェース: おなじみの
db["key"] = value構文で操作 - 即時永続化: 書き込みは即座にSQLiteに保存
- スマートキャッシュ: 遅延ロード(アクセス時)または一括ロード(起動時)
- ネスト構造対応: 30階層以上のネストしたdict/listをサポート
- 高性能: WALモード、mmap、バッチ操作で最高速度を実現
- セキュリティと安定性 (v1.2.0): SQL検証、ReDoS対策、厳格な接続管理を導入
- 設定不要: 合理的なデフォルト設定でそのまま動作
📦 インストール
pip install nanasqlite
オプション機能付きのインストール:
# 高速化オプション(orjson + lru-dict)
pip install "nanasqlite[speed]"
# 暗号化機能(AES-GCM/ChaCha20/Fernet)
pip install "nanasqlite[encryption]"
# すべてのランタイム用オプションを一括インストール
pip install "nanasqlite[all]"
# 開発用ツール(pytest, ruff, mypy, tox等)
pip install -e ".[dev]"
⚡ クイックスタート
from nanasqlite import NanaSQLite
# データベースを作成または開く
db = NanaSQLite("mydata.db")
# dictのように使う
db["user"] = {"name": "Nana", "age": 20, "tags": ["admin", "active"]}
print(db["user"]) # {'name': 'Nana', 'age': 20, 'tags': ['admin', 'active']}
# データは自動的に永続化
db.close()
# 後で再度開いても、データはそのまま!
db = NanaSQLite("mydata.db")
print(db["user"]["name"]) # 'Nana'
🔧 高度な使い方
# 一括ロードで繰り返しアクセスを高速化
db = NanaSQLite("mydata.db", bulk_load=True)
# バッチ操作で高速な読み書き
db.batch_update({"k1": "v1", "k2": "v2"})
results = db.batch_get(["k1", "k2"])
# コンテキストマネージャ対応
with NanaSQLite("mydata.db") as db:
db["temp"] = "value"
📚 ドキュメント
✨ v1.3.x 新機能
- キャッシュ戦略: LRU / TTL サポート (ドキュメント)
- データ暗号化: AES-GCM / ChaCha20 / Fernet (ドキュメント)
- 永続化 TTL: SQLite上のデータの自動消去。
✨ v1.2.0 新機能
セキュリティ強化と厳格な接続管理:
# v1.2.0 セキュリティ機能
db = NanaSQLite("mydata.db",
strict_sql_validation=True, # 未許可のSQL関数を禁止
max_clause_length=500 # SQLの長さを制限してReDoSを防止
)
# v1.2.0 読み取り専用接続プール(非同期のみ)
async with AsyncNanaSQLite("mydata.db", read_pool_size=5) as db:
# 重い読み取り操作(query, fetch_all)は自動的にプールを使用
results = await asyncio.gather(
db.query("logs", where="level=?", parameters=("ERROR",)),
db.query("logs", where="level=?", parameters=("INFO",))
)
# 厳格な接続管理
db.close()
# 無効化されたインスタンスへのアクセスは NanaSQLiteClosedError を送出します。
✨ v1.1.0 新機能
同一データベース内の複数テーブルを接続共有で安全に操作:
from nanasqlite import NanaSQLite
# メインテーブルインスタンスを作成
main_db = NanaSQLite("mydata.db", table="users")
# 同じ接続を共有する別のテーブルインスタンスを取得
products_db = main_db.table("products")
orders_db = main_db.table("orders")
# 各テーブルは独立したキャッシュと操作を持つ
main_db["user1"] = {"name": "Alice"}
products_db["prod1"] = {"name": "Laptop"}
オプションのデータ暗号化 (v1.3.1a1+):
from nanasqlite import NanaSQLite
# 事前にインストール: pip install nanasqlite[encryption]
db = NanaSQLite("secure.db", encryption_key=b"your-32-byte-key") # デフォルトで AES-GCM
# モードを明示的に指定する場合
db_chacha = NanaSQLite("secure_cc.db",
encryption_key=b"your-32-byte-key",
encryption_mode="chacha20"
)
# SQLite内では暗号化されますが、メモリ上(キャッシュ)では平文で高速に扱えます
db["secret"] = {"password": "123"}
トランザクションサポートとエラーハンドリング (v1.1.0+):
from nanasqlite import NanaSQLite, NanaSQLiteTransactionError
with db.transaction():
db["key1"] = "value1"
db["key2"] = "value2"
✨ v1.0.3+ レガシー機能
Pydantic互換性と直接SQL実行:
# Pydantic互換性
db.set_model("user", User(name="Nana", age=20))
# 直接SQL実行
db.execute("SELECT * FROM data WHERE key LIKE ?", ("user%",))
# 22種類のSQLiteラッパー関数 (sql_insert, sql_update, count等)
db.sql_insert("users", {"name": "Alice", "age": 25})
License
MIT License - see LICENSE for details.
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