: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 simpledatabase 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'``.
