Skip to main content

A dict-like SQLite wrapper with APSW for instant persistence and memory caching

Project description

NanaSQLite

PyPI version Python versions License: MIT Downloads Tests

A dict-like SQLite wrapper with instant persistence and intelligent caching.

English | 日本語


English

🚀 Features

  • Dict-like Interface: Use familiar db["key"] = value syntax
  • 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

✨ v1.4.x New Features (v2 Architecture)

v2 Architecture: Non-blocking Background Persistance Introduced an optional "Write-Back Cache" architecture where all KVS writes are instantly available in memory but saved to SQLite asynchronously in the background. Read latency remains exactly zero.

# Enable v2 mode with automatic background flushing
db = NanaSQLite("high_load.db", v2_mode=True, flush_mode="time", flush_interval=1.0)

# The main thread is NEVER blocked by disk I/O!
db["heavy_key"] = validate_and_compute_data()

⚠️ WARNING: v2 mode is built for SINGLE-PROCESS systems. Do not use it with multi-worker setups (e.g., Gunicorn with multiple workers) as parallel background threads will corrupt the SQLite file.

✨ 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.
  • Lock Timeout (v1.3.4b1): Raise NanaSQLiteLockError if the lock is held too long, preventing indefinite hangs in multi-threaded apps.
  • Backup & Restore (v1.3.4b1): Online backup via APSW's SQLite backup API and one-call restore from any backup file.
  • Security Audit & Hardening (v1.3.4): Whitelist-based column type validation, AEAD nonce validation, closed-instance safety on all dict methods. See CHANGELOG for full details.
  • Security Audit & v2 Bug Fixes (v1.4.0): Fixed SQL injection in create_table() column types, V2Engine callback ordering, async child attribute inheritance, and v2 mode read-query bypass. See CHANGELOG for full details.
# Lock Timeout
db = NanaSQLite("app.db", lock_timeout=2.0)

# Backup
db.backup("snapshot.db")

# Restore
db.restore("snapshot.db")

✨ 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

✨ v1.4.x 新機能 (v2 アーキテクチャ)

v2 アーキテクチャ: ノンブロッキング・バックグラウンド永続化 KVSの書き込みをすべて「Write-Back Cache(メモリ優先更新)」として処理し、SQLiteへの保存をバックグラウンドスレッドで非同期に行うオプションアーキテクチャを導入しました。読み込みレイテンシも引き続きゼロコストです。

# v2モードを有効化(1秒ごとのバックグラウンドフラッシュ)
db = NanaSQLite("high_load.db", v2_mode=True, flush_mode="time", flush_interval=1.0)

# どんなに重いI/Oが発生しても、メインスレッドは一切ブロックされません!
db["heavy_key"] = validate_and_compute_data()

⚠️ 警告: v2モードは「単一プロセス」システム専用に設計されています。Gunicornの複数ワーカー構成などでv2モードを使用すると、複数のバックグラウンドスレッドが同時にSQLiteファイルを上書きし、致命的なデータ破損を引き起こします。

✨ 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。
  • ロックタイムアウト (v1.3.4b1): ロックが一定時間内に取得できない場合に NanaSQLiteLockError を送出。マルチスレッドでのハング防止に最適。
  • バックアップ / リストア (v1.3.4b1): APSW の SQLite バックアップ API によるオンラインバックアップと、一発でのリストアをサポート。
  • セキュリティ監査・強化 (v1.3.4): column_type ホワイトリスト検証、AEAD nonce 検証、全 dict メソッドのクローズ済みインスタンス安全性。詳細は CHANGELOG を参照。
  • セキュリティ監査・v2 バグ修正 (v1.4.0): create_table() カラム型SQLインジェクション修正、V2Engineコールバック順序修正、非同期子インスタンス属性継承修正、v2モード読み取りクエリバイパス修正。詳細は CHANGELOG を参照。
# ロックタイムアウト
db = NanaSQLite("app.db", lock_timeout=2.0)

# バックアップ
db.backup("snapshot.db")

# リストア
db.restore("snapshot.db")

✨ 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。

セキュリティ詳細を見る ↗

✨ 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"

マルチテーブルと非同期を詳しく ↗

✨ 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.

Project details


Release history Release notifications | RSS feed

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

nanasqlite-1.4.0.tar.gz (155.2 kB view details)

Uploaded Source

Built Distribution

If you're not sure about the file name format, learn more about wheel file names.

nanasqlite-1.4.0-py3-none-any.whl (66.4 kB view details)

Uploaded Python 3

File details

Details for the file nanasqlite-1.4.0.tar.gz.

File metadata

  • Download URL: nanasqlite-1.4.0.tar.gz
  • Upload date:
  • Size: 155.2 kB
  • Tags: Source
  • Uploaded using Trusted Publishing? Yes
  • Uploaded via: twine/6.1.0 CPython/3.13.7

File hashes

Hashes for nanasqlite-1.4.0.tar.gz
Algorithm Hash digest
SHA256 e0b1b5f4243eebce3618558d6569613a08a48de6e81cd9bc4338135f89b3d67d
MD5 c21623474c594a8db48ac4765c95d551
BLAKE2b-256 2477f31d5cccb390d3d8cd43f44da5c02004101ef9ca7236bc6bea1a2ce872ab

See more details on using hashes here.

Provenance

The following attestation bundles were made for nanasqlite-1.4.0.tar.gz:

Publisher: ci.yml on disnana/NanaSQLite

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

File details

Details for the file nanasqlite-1.4.0-py3-none-any.whl.

File metadata

  • Download URL: nanasqlite-1.4.0-py3-none-any.whl
  • Upload date:
  • Size: 66.4 kB
  • Tags: Python 3
  • Uploaded using Trusted Publishing? Yes
  • Uploaded via: twine/6.1.0 CPython/3.13.7

File hashes

Hashes for nanasqlite-1.4.0-py3-none-any.whl
Algorithm Hash digest
SHA256 a208bf390cd735996b9dba79be7e6e9d28a93d43be13a538141ec97b6bb7a11f
MD5 c6ba80a2c59cf7e2aede380839c271bd
BLAKE2b-256 c8b6267e6c22187766fbe081d101b8a4c26fd805d30165d710d5ab35b2421d78

See more details on using hashes here.

Provenance

The following attestation bundles were made for nanasqlite-1.4.0-py3-none-any.whl:

Publisher: ci.yml on disnana/NanaSQLite

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Supported by

AWS Cloud computing and Security Sponsor Datadog Monitoring Depot Continuous Integration Fastly CDN Google Download Analytics Pingdom Monitoring Sentry Error logging StatusPage Status page