def _create(self, command):
        """
    create [ <filename> ]

    Create and load a new Minecraft Alpha world. This world will have no
    chunks and a random terrain seed. If run from the shell, filename is not
    needed because you already specified a filename earlier in the command.
    For example:

        mce.py MyWorld create

    """
        if len(command) < 1:
            raise UsageError("Expected a filename")

        filename = command[0]
        if not os.path.exists(filename):
            os.mkdir(filename)

        if not os.path.isdir(filename):
            raise IOError("{0} already exists".format(filename))

        if mclevel.MCInfdevOldLevel.isLevel(filename):
            raise IOError("{0} is already a Minecraft Alpha world".format(filename))

        level = mclevel.MCInfdevOldLevel(filename, create=True)

        self.level = level

    create [ <filename> ]

    Create and load a new Minecraft Alpha world. This world will have no
    chunks and a random terrain seed. If run from the shell, filename is not
    needed because you already specified a filename earlier in the command.
    For example:

        mce.py MyWorld create

    
mce.py