具有多个迭代值的For循环 [英] For loop with multiple iterating values

问题描述

我试图了解Python FOR LOOP中多个值的工作方式.我试图创建自己的测试，但是没有用.为什么? 谢谢！

I am trying to understand how multiple values in a Python FOR LOOP works. I tried to create my own test, but it doesn't work. Why? Thanks!

我的测试:

 myList = [4, 5, 7, 23, 45, 65, 3445, 234, 34]                                   

 for i, b in myList:
     print ("first= %d, second= %d" % (i, b))

推荐答案

尝试使用

myList = [(4, 5), (7, 23), (45, 65), (3445, 234)]                      

一般概念称为元组拆包.一个简单的例子:

The general concept is called tuple unpacking. A simpler example:

a, b = (1, 2)

即不需要for循环.

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