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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 is_ext_pack_usable(self, name):
 """Check if the given extension pack is loaded and usable. in name of type str The name of the extension pack to check for. return usable of type bool Is the given extension pack loaded and usable. """

        if not isinstance(name, basestring):
            raise TypeError("name can only be an instance of type basestring")
        usable = self._call("isExtPackUsable",
                     in_p=[name])
        return usable