11. 数据持久性 ¶

此章描述的模块支持以持久形式在磁盘存储 Python 数据。 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. The bsddb module also provides such disk-based string-to-string mappings based on hashing, and also supports B-Tree and record-based formats.

此章描述的模块列表：

• 11.1. pickle — Python 对象序列化
  • 11.1.1. Relationship to other Python modules
  • 11.1.2. Data stream format
  • 11.1.3. Usage
  • 11.1.4. What can be pickled and unpickled?
  • 11.1.5. The pickle protocol
    • 11.1.5.1. Pickling and unpickling normal class instances
    • 11.1.5.2. Pickling and unpickling extension types
    • 11.1.5.3. Pickling and unpickling external objects
  • 11.1.6. Subclassing Unpicklers
  • 11.1.7. Example
• 11.2. cPickle — 更快 pickle
• 11.3. copy_reg — 注册 pickle 支持函数
  • 11.3.1. Example
• 11.4. shelve — Python 对象持久性
  • 11.4.1. Restrictions
  • 11.4.2. Example
• 11.5. marshal — 内部 Python 对象序列化
• 11.6. anydbm — 对 DBM 样式数据库的一般访问
• 11.7. whichdb — 猜测哪个 DBM 模块创建数据库
• 11.8. dbm — 简单数据库接口
• 11.9. gdbm — dbm 的 GNU 重新解释
• 11.10. dbhash — DBM 样式 BSD 数据库的库接口
  • 11.10.1. Database Objects
• 11.11. bsddb — 接口到 Berkeley DB 库
  • 11.11.1. Hash, BTree and Record Objects
• 11.12. dumbdbm — 便携式 DBM 实施
  • 11.12.1. Dumbdbm Objects
• 11.13. sqlite3 — SQLite 数据库的 DB-API 2.0 接口
  • 11.13.1. 模块函数和常量
  • 11.13.2. Connection 对象
  • 11.13.3. Cursor 对象
  • 11.13.4. 行对象
  • 11.13.5. SQLite 和 Python 类型
    • 11.13.5.1. 介绍
    • 11.13.5.2. Using adapters to store additional Python types in SQLite databases
      • 11.13.5.2.1. Letting your object adapt itself
      • 11.13.5.2.2. Registering an adapter callable
    • 11.13.5.3. Converting SQLite values to custom Python types
    • 11.13.5.4. Default adapters and converters
  • 11.13.6. Controlling Transactions
  • 11.13.7. 使用 sqlite3 efficiently
    • 11.13.7.1. Using shortcut methods
    • 11.13.7.2. Accessing columns by name instead of by index
    • 11.13.7.3. Using the connection as a context manager
  • 11.13.8. Common issues
    • 11.13.8.1. Multithreading

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