打印数字时添加千位分隔符 [英] Adding thousand separator while printing a number

问题描述

我真的不知道这个问题的名称"，所以它可能是一个不正确的标题，但问题很简单，如果我有一个数字

例如:

编号 = 23543第二个 = 68471243

我想让 print() 像这样.

<块引用>

23,543
68,471,243

我希望这足够解释或者添加评论.任何帮助表示赞赏！

解决方案

如果您只需要添加逗号作为千位分隔符并且使用 Python 3.6 或更高版本:

print(f"{number:,g}")

这使用格式化的字符串文字样式.大括号 {0} 中的项目是要格式化为字符串的对象.冒号 : 表示应该修改输出.逗号 , 表示逗号应用作千位分隔符，而 g 表示一般数字.[1]

使用较旧的 Python 3 版本，没有 f 字符串:

print("{0:,g}".format(number))

这使用 str-objects 的格式方法 [2].大括号 {0} 中的项目是字符串中的占位符，冒号 : 表示应该修改内容.逗号 , 表示逗号应用作千位分隔符，g 用于一般数字 [3].然后调用字符串对象的 format 方法，并将变量 number 作为参数传递.

68,471,24,3 对我来说似乎有点奇怪.只是打字错误吗?

格式化字符串文字

Python 3 str.format()

Python 3 格式字符串语法

I don't really know the "name" for this problem, so it might be a incorrect title, but the problem is simple, if I have a number

for example:

number = 23543
second = 68471243

I want to it make print() like this.

23,543
68,471,243

I hope this explains enough or else add comments. Any help is appreciated!

解决方案

If you only need to add comma as thousand separator and are using Python version 3.6 or greater:

print(f"{number:,g}")

This uses the formatted string literals style. The item in braces {0} is the object to be formatted as a string. The colon : states that output should be modified. The comma , states that a comma should be used as thousands separator and g is for general number. [1]

With older Python 3 versions, without the f-strings:

print("{0:,g}".format(number))

This uses the format-method of the str-objects [2]. The item in braces {0} is a place holder in string, the colon : says that stuff should be modified. The comma , states that a comma should be used as thousands separator and g is for general number [3]. The format-method of the string object is then called and the variable number is passed as an argument.

The 68,471,24,3 seems a bit odd to me. Is it just a typo?

Formatted string literals

Python 3 str.format()

Python 3 Format String Syntax

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