def open_ext_pack_file(self, path):
        """Attempts to open an extension pack file in preparation for
        installation.

        in path of type str
            The path of the extension pack tarball. This can optionally be
            followed by a "::SHA-256=hex-digit" of the tarball.

        return file_p of type :class:`IExtPackFile`
            The interface of the extension pack file object.

        """
        if not isinstance(path, basestring):
            raise TypeError("path can only be an instance of type basestring")
        file_p = self._call("openExtPackFile",
                     in_p=[path])
        file_p = IExtPackFile(file_p)
        return file_p
Attempts to open an extension pack file in preparation for
        installation.

        in path of type str
            The path of the extension pack tarball. This can optionally be
            followed by a "::SHA-256=hex-digit" of the tarball.

        return file_p of type :class:`IExtPackFile`
            The interface of the extension pack file object.