在Python中使用循环来命名变量 [英] Using a loop in Python to name variables

问题描述

如何使用循环来命名变量？例如，如果我想变量 double_1 = 2 ， double_2 = 4 一直到 double_12 = 24 ，我该如何写它？
我感觉它会是这样的：

How do I use a loop to name variables? For example, if I wanted to have a variable double_1 = 2, double_2 = 4 all the way to double_12 = 24, how would I write it? I get the feeling it would be something like this:

for x in range(1, 13):
    double_x = x * 2 
    #I want the x in double_x to count up, e.g double_1, double_2, double_3

显然，这不起作用，但是将循环数字实现为变量名称的正确语法是什么？我还没有编码一段时间，但我记得有一种方法来做到这一点。

Obviously, this doesn't work, but what would be the correct syntax for implementing the looped number into the variable name? I haven't coded for a while, but I do remember there was a way to do this.

推荐答案

使用字典。例如：

Use a dictionary instead. E.g:

doubles = dict()

for x in range(1, 13):
    doubles[x] = x * 2

或者 必须执行 只有完全了解你正在做什么 ，你可以分配给 locals（）作为字典：

Or if you absolutely must do this AND ONLY IF YOU FULLY UNDERSTAND WHAT YOU ARE DOING, you can assign to locals() as to a dictionary:

>>> for x in range(1, 13):
...     locals()['double_{0}'.format(x)] = x * 2
... 
>>> double_3
6

永远不应该是原因这样做 - 因为你应该使用字典来代替！

There never, ever should be a reason to do this, though - since you should be using the dictionary instead!

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