Python 集合与列表

本文介绍了Python 集合与列表的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

在 Python 中，哪种数据结构更高效/快速?假设该顺序对我来说并不重要并且无论如何我都会检查重复项，那么 Python 集是否比 Python 列表慢?

In Python, which data structure is more efficient/speedy? Assuming that order is not important to me and I would be checking for duplicates anyway, is a Python set slower than a Python list?

推荐答案

这取决于你打算用它做什么.

It depends on what you are intending to do with it.

在确定对象是否存在于集合中时，集合明显更快(如 x in s)，但在迭代其内容时比列表慢.

Sets are significantly faster when it comes to determining if an object is present in the set (as in x in s), but are slower than lists when it comes to iterating over their contents.

您可以使用timeit 模块来查看哪种更适合您的情况.

You can use the timeit module to see which is faster for your situation.