range()函数返回类型

最新推荐文章于 2025-02-06 19:07:30 发布

lei_qi

最新推荐文章于 2025-02-06 19:07:30 发布

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本文探讨了Python内置的range()函数生成的不是列表，而是iterable对象，它在for循环中逐个返回序列元素，节省内存空间。重点讲解了如何利用iterable和for语句，以及list()函数将其转换为列表的应用。

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In many ways the object returned by range() behaves as if it is a list, but in fact it isn’t. It is an object which returns the successive items of the desired sequence when you iterate over it, but it doesn’t really make the list, thus saving space.

We say such an object is iterable, that is, suitable as a target for functions and constructs that expect something from which they can obtain successive items until the supply is exhausted. We have seen that the for statement is such an iterator. The function list() is another; it creates lists from iterables
range()函数得到的其实是一个iterable类型，在python里解释为可以迭代的对象，所以可以使用for来遍历产生的结果，使用list()将结果转化为列表类型。