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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 set_renamed_input_fields(self, renamed_input_fields):
 """This method expects a scalar string or a list of input_fields to """

        if not (isinstance(renamed_input_fields, basestring) or
                isinstance(renamed_input_fields, ListType)):
            raise ValueError("renamed_input_fields must be a string or a list")
        self.renamed_input_fields = renamed_input_fields
        return self