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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 dump_guest_stack(self, cpu_id):
 """Produce a simple stack dump using the current guest state. This feature is not implemented in the 4.0.0 release but may show up in a dot release. in cpu_id of type int The identifier of the Virtual CPU. return stack of type str String containing the formatted stack dump. """

        if not isinstance(cpu_id, baseinteger):
            raise TypeError("cpu_id can only be an instance of type baseinteger")
        stack = self._call("dumpGuestStack",
                     in_p=[cpu_id])
        return stack