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/Doc/library/whichdb.rst

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 1:mod:`whichdb` --- Guess which DBM module created a database
 2============================================================
 3
 4.. module:: whichdb
 5   :synopsis: Guess which DBM-style module created a given database.
 6
 7.. note::
 8   The :mod:`whichdb` module's only function has been put into the :mod:`dbm`
 9   module in Python 3.0.  The :term:`2to3` tool will automatically adapt imports
10   when converting your sources to 3.0.
11
12
13The single function in this module attempts to guess which of the several simple
14database modules available--\ :mod:`dbm`, :mod:`gdbm`, or :mod:`dbhash`\
15--should be used to open a given file.
16
17
18.. function:: whichdb(filename)
19
20   Returns one of the following values: ``None`` if the file can't be opened
21   because it's unreadable or doesn't exist; the empty string (``''``) if the
22   file's format can't be guessed; or a string containing the required module name,
23   such as ``'dbm'`` or ``'gdbm'``.
24