在 str.format 中切片字符串 [英] Slicing strings in str.format

问题描述

我想用 str.format 实现以下目标:

I want to achieve the following with str.format:

x,y = 1234,5678
print str(x)[2:] + str(y)[:2]

我能做到的唯一方法是:

The only way I was able to do it was:

print '{0}{1}'.format(str(x)[2:],str(y)[:2])

现在，这是一个示例，我真正拥有的是一个又长又乱的字符串，因此我想将切片放在 {} 中.我研究了文档，但我不知道正确的语法.我的问题是:是否可以在替换字段内对字符串进行切片?

Now, this an example and what I really have is a long and messy string, and so I want to put slicing inside the {}. I've studied the docs, but I can't figure out the correct syntax. My question is: is it possible to slice strings inside a replacement field?

推荐答案

不，您不能对替换字段内的字符串应用切片.

No, you can't apply slicing to strings inside a the replacement field.

您需要参考格式规范迷你语言；它定义了是什么是可能的.这种迷你语言定义了如何格式化引用的值(替换字段语法中 : 之后的部分).

You'll need to refer to the Format Specification Mini-Language; it defines what is possible. This mini language defines how you format the referenced value (the part after the : in the replacement field syntax).

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