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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def __cmd_to_func(cmd):
 """ Returns the function object in this module matching cmd. """

    fiss_module = sys.modules[__name__]
    # Returns None if string is not a recognized FISS command
    func = getattr(fiss_module, cmd, None)
    if func and not hasattr(func, 'fiss_cmd'):
        func = None
    return func