Python 3 将范围转换为列表 [英] Python 3 turn range to a list

问题描述

我正在尝试制作一个包含数字 1-1000 的列表.显然，写/读会很烦人，所以我试图制作一个包含范围的列表.在 Python 2 中，似乎:

I'm trying to make a list with numbers 1-1000 in it. Obviously this would be annoying to write/read, so I'm attempting to make a list with a range in it. In Python 2 it seems that:

some_list = range(1,1000)

本来可行，但在 Python 3 中，范围类似于 Python 2 的 xrange?

would have worked, but in Python 3 the range is similar to the xrange of Python 2?

有人可以对此提供一些见解吗?

Can anyone provide some insight into this?

推荐答案

你可以只从范围对象构造一个列表:

You can just construct a list from the range object:

my_list = list(range(1, 1001))

这也是你在 python2.x 中使用生成器的方式.通常来说，您可能不需要列表，因为您可以更有效地使用 my_list[i] 的值(i + 1)，如果您只是需要迭代它，你可以回到 range.

This is how you do it with generators in python2.x as well. Typically speaking, you probably don't need a list though since you can come by the value of my_list[i] more efficiently (i + 1), and if you just need to iterate over it, you can just fall back on range.

还要注意，在 python2.x 上，xrange 仍然是可索引的¹.这意味着python3.x上的range也有相同的属性²

Also note that on python2.x, xrange is still indexable¹. This means that range on python3.x also has the same property²

^{1print xrange(30)[12] 适用于 python2.x}

^{1print xrange(30)[12] works for python2.x}

^{2python3.x 中与 1 类似的语句是 print(range(30)[12]) 和也可以.}

^{2The analogous statement to 1 in python3.x is print(range(30)[12]) and that works also.}

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