What you can do is you can iterate keys, which gives you the keys in the dictionary, and then you can choose them, but there's no guarantee in the order in which you get keys.
你能做的就是迭代得到键,这样就可以得到字典中,所有的键并进行选择,但是键的顺序,是没有保证的。
Because the order of this doesn't matter.
因为字典里元素的顺序无关紧要。
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