如何在字典中以原始顺序返回键 [英] How to return keys in original order in a dict

问题描述

我正在读取文件，并将信息从上到下读取到字典中.与原始文件相比，我不想以错误的顺序打印出来.

I'm reading in a file and storing the info in a dict as it reads from top to bottom. I don't want to print out in a wrong order compared to the original file.

还有一个非常小的问题:我记得在if and else语句的简短形式中看到它:

Also, a very small question: I remember seeing it somewhere a short form of the if and else statement:

if a == 'a':
    a = 'b' ? a = 'c'  

您知道确切的形式吗?

Do you know the exact form?

谢谢.

推荐答案

1. 使用 OrderedDict .
li>
2. a = 'b' if a == 'a' else 'c'

1. Use an OrderedDict.
2. a = 'b' if a == 'a' else 'c'

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