資料持久性 (Data Persistence)
*****************************

The modules described in this chapter support storing Python data in a
persistent form on disk.  The "pickle" and "marshal" modules can turn
many Python data types into a stream of bytes and then recreate the
objects from the bytes.  The various DBM-related modules support a
family of hash-based file formats that store a mapping of strings to
other strings.

本章節所描述的模組列表為：

* "pickle" --- Python 物件序列化

  * 和其他 Python 模組的關係

    * 和 "marshal" 的比較

    * 和 "json" 的比較

  * Data stream format

  * 模組介面

  * What can be pickled and unpickled?

  * Pickling Class Instances

    * Persistence of External Objects

    * Dispatch Tables

    * Handling Stateful Objects

  * Custom Reduction for Types, Functions, and Other Objects

  * Out-of-band Buffers

    * Provider API

    * Consumer API

    * 範例

  * Restricting Globals

  * Performance

  * 範例

* "copyreg" --- 註冊 "pickle" 支援函式

  * 範例

* "shelve" --- Python object persistence

  * Restrictions

  * 範例

* "marshal" --- 内部 Python 物件序列化

* "dbm" --- Unix "databases" 的介面

  * "dbm.gnu" --- GNU 資料庫管理器

  * "dbm.ndbm" --- 新資料庫管理器

  * "dbm.dumb" --- 可攜式 DBM 實作

* "sqlite3" --- SQLite 資料庫的 DB-API 2.0 介面

  * 教學

  * Reference

    * Module functions

    * Module constants

    * Connection 物件

    * Cursor 物件

    * Row 物件

    * Blob 物件

    * PrepareProtocol 物件

    * 例外

    * SQLite and Python types

    * Default adapters and converters (deprecated)

    * 命令列介面

  * How-to guides

    * How to use placeholders to bind values in SQL queries

    * How to adapt custom Python types to SQLite values

      * How to write adaptable objects

      * How to register adapter callables

    * How to convert SQLite values to custom Python types

    * Adapter and converter recipes

    * How to use connection shortcut methods

    * How to use the connection context manager

    * How to work with SQLite URIs

    * How to create and use row factories

    * How to handle non-UTF-8 text encodings

  * 解釋

    * Transaction control

      * Transaction control via the "autocommit" attribute

      * Transaction control via the "isolation_level" attribute
