symbian-qemu-0.9.1-12/python-2.6.1/Doc/library/whichdb.rst
author Gareth Stockwell <gareth.stockwell@accenture.com>
Wed, 22 Sep 2010 15:40:40 +0100
branchgraphics-phase-3
changeset 111 345f1c88c950
parent 1 2fb8b9db1c86
permissions -rw-r--r--
Fixes to syborg-graphicswrapper.vcproj These changes allow syborg-graphicswrapper to link against the hostthreadadapter and khronosapiwrapper libraries built by the graphics.simulator component. The .vcproj file uses relative paths, which requires that the following three packages are laid out as follows: os/ graphics adapt/ graphics.simulator qemu

:mod:`whichdb` --- Guess which DBM module created a database
============================================================

.. module:: whichdb
   :synopsis: Guess which DBM-style module created a given database.

.. note::
   The :mod:`whichdb` module's only function has been put into the :mod:`dbm`
   module in Python 3.0.  The :term:`2to3` tool will automatically adapt imports
   when converting your sources to 3.0.


The single function in this module attempts to guess which of the several simple
database modules available--\ :mod:`dbm`, :mod:`gdbm`, or :mod:`dbhash`\
--should be used to open a given file.


.. function:: whichdb(filename)

   Returns one of the following values: ``None`` if the file can't be opened
   because it's unreadable or doesn't exist; the empty string (``''``) if the
   file's format can't be guessed; or a string containing the required module name,
   such as ``'dbm'`` or ``'gdbm'``.