symbian-qemu-0.9.1-12/python-2.6.1/Doc/library/persistence.rst
author johnathan.white@2718R8BGH51.accenture.com
Mon, 08 Mar 2010 18:45:03 +0000
changeset 46 b6935a90ca64
parent 1 2fb8b9db1c86
permissions -rw-r--r--
Modify framebuffer and NGA framebuffer to read screen size from board model dtb file. Optimise memory usuage of frame buffer Add example minigui application with hooks to profiler (which writes results to S:\). Modified NGA framebuffer to run its own dfc queue at high priority


.. _persistence:

****************
Data Persistence
****************

The modules described in this chapter support storing Python data in a
persistent form on disk.  The :mod:`pickle` and :mod:`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 :mod:`bsddb`
module also provides such disk-based string-to-string mappings based on hashing,
and also supports B-Tree and record-based formats.

The list of modules described in this chapter is:


.. toctree::

   pickle.rst
   copy_reg.rst
   shelve.rst
   marshal.rst
   anydbm.rst
   whichdb.rst
   dbm.rst
   gdbm.rst
   dbhash.rst
   bsddb.rst
   dumbdbm.rst
   sqlite3.rst