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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 dumps(self):
 """Return representation of the path command."""


        ret_str = []
        for item in self._arg_list:
            if isinstance(item, TikZUserPath):
                ret_str.append(item.dumps())
            elif isinstance(item, TikZCoordinate):
                ret_str.append(item.dumps())
            elif isinstance(item, str):
                ret_str.append(item)

        return ' '.join(ret_str)