This is not an error but inefficient, since the list search is O(n). If possible, a set or dictionary
should be used instead.
Note: Since the conversion of the list to a set is an O(n) operation, it should ideally be done only once when generating the list.
命名元组可以用于任何正常元组使用的地方,但可以通过name访问value,而不是索引。这使得代码更详细、更容易阅读。
支持解包的序列有:list, tuple, dict
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