集合中元素的python顺序 [英] python order of elements in set

问题描述

我不明白 Python 从保持集应用的顺序.例如:

I do not understand the ordering what Python applies from holding sets. For example:

visited = set()
visited.add('C')
visited.add('A')
visited.add('B')
print(set)

顺序是'A', 'C', 'B'.为什么A"在C"之前(可能是按字母顺序排列)?为了保留添加顺序，我必须做什么，即 'C', 'A', 'B'?

The ordering is 'A', 'C', 'B'. Why 'A' is before 'C' (maybe alphabetical order)? What I have to do in order to preserve the adding ordering, i.e. 'C', 'A', 'B'?

推荐答案

你不能有顺序.并且无法知道 Python 是如何对其进行排序的.检查这个答案以寻找替代方案.

You cannot have order in sets. and there is no way to tell how Python orders it. Check this answer for alternatives.

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