Python中小数点后的浮点数加零

2022-01-09 00:00:00 python floating-point decimal

问题描述

我正在从文件中读取数据,对其进行修改并将其写入另一个文件.新文件将被另一个程序读取,因此保留准确的格式至关重要

I am reading in data from a file, modify it and write it to another file. The new file will be read by another program and therefore it is crucial to carry over the exact formatting

例如,我的输入文件中的一个数字是:

for example, one of the numbers on my input file is:

1.000000

我的脚本对列应用了一些数学运算并应该返回

my script applies some math to the columns and should return

2.000000

但是当前返回的是

2.0

如何将浮点数(例如 my_float = 2.0,作为 my_float = 2.00000)写入文件?

How would I write a float for example my_float = 2.0, as my_float = 2.00000 to a file?


解决方案

格式化到小数点后6位:

Format it to 6 decimal places:

format(value, '.6f')

演示:

>>> format(2.0, '.6f')
'2.000000'

format() 函数按照给定的格式化说明将值转换为字符串.

The format() function turns values to strings following the formatting instructions given.

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