蟒蛇？ （有条件/三元）运算符的任务 [英] python ? (conditional/ternary) operator for assignments

问题描述

C和许多其他语言有一个条件（又名三元）运营商。这使您可以根据条件的真相，这使得前pressions，包括作业，两个值之间做出非常简洁的选择非常简洁。

C and many other languages have a conditional (aka ternary) operator. This allows you to make very terse choices between two values based on the truth of a condition, which makes expressions, including assignments, very concise.

我想这是因为我发现我的code有很多是需要四线在Python有条件分配：

I miss this because I find that my code has lots of conditional assignments that take four lines in Python:

if condition:
    var = something
else:
    var = something_else

而在C中，它将会是：

Whereas in C it'd be:

var = condition? something: something_else;

在一个文件中一次或两次是好的，但如果你有很多条件分配行数爆炸，最糟糕的是，眼睛被吸引到他们。

Once or twice in a file is fine, but if you have lots of conditional assignments the number of lines explode and, worst of all, the eye is drawn to them.

我喜欢的条件运算符的简洁性，因为它让事情掠过code时，我认为非战略从分散我的注意力。

I like the terseness of the conditional operator because it keeps things I deem un-strategic from distracting me when skimming the code.

的所以，在Python，还有我介绍他们，你可以用它来获得分配成一条线近似条件运算符的优势什么花样？的

推荐答案

Python有这样一个操作符：

Python has such an operator:

variable = something if condition else something_else

另外，虽然不建议（见@ karadoc的评论）

Alternatively, although not recommended (see @karadoc's comment):

variable = (condition and something) or something_else

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