def select_one_rule(self, rules):
     return RuleTemplate.select_one(rules, len(self.corpus), 3)
 def select_one_rule(self, rules):
     """
     Having a set of rules candidate for correcting some error, select the
     one correcting the more case, and creating the less errors.
     """
     return RuleTemplate.select_one(rules, len(self.tokens))