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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 yield_param_completion(self, param, last_word):
 """ yields a parameter """

        return Completion(param, -len(last_word), display_meta=self.param_description.get(
            self.current_command + " " + str(param), '').replace(os.linesep, ''))