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: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. The :term:`2to3` tool will automatically adapt imports when converting your sources to Python 3. 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'``.