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在设置辞典的键时,想用某个对象的uid做键(公式为:cupbot.uid),发现键不能为数字,所以将齐用引号引上,发现直接把取uid的公式做键了(公式为:"cupbot.uid"),然后就想,那我再前方拼接个abc+uid(公式为:"abc"(cupbot.uid)),发现键只保留了abc部分,请问想要将uid做键正确操作是什么?或者如何将字符串拼接获取出来的uid?