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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 show_value(self, value):
 """ Get a specific canned value :type value: str :param value: Canned value to show :rtype: dict :return: A dictionnary containing canned value description """

        values = self.get_values()
        values = [x for x in values if x['label'] == value]
        if len(values) == 0:
            raise Exception("Unknown value")
        else:
            return values[0]