使用format（）对齐并打印浮动列表 [英] Round, align and print list of floats with format()

问题描述

我需要写几个浮动文件，我使用 format（）方法。我想要的是将浮点数四舍五入到给定的小数位数和同时写入它们。

I need to write several floats to file for which I am using the format() method. What I want is to round the floats to a given number of decimal places and write them aligned at the same time.

这是一个MWE：

a = 546.35642
b = 6785.35416
c = 12.5235
d = 13.643241

line = [str('{:.2f}'.format(a)),
    str('{:.4f}'.format(b)),
    str('{:.5f}'.format(c)),
    str('{:.3f}'.format(d))]

with open('format_test.dat', "a") as f_out:
    f_out.write('''{:>10} {:>15} {:>16} {:>15}'''.format(*line))
    f_out.write('\n')

对我来说似乎非常复杂。有没有更好的方式来使用 format（）？

This gets the job done but it seems awfully convoluted to me. Is there a better way to do this using format()?

推荐答案

你可以用对齐的格式添加。＃f 。

You can just add the .#f in the format with the alignment.

with open('format_test.dat', "a") as f_out:
    f_out.write('''{:>10.2f} {:>15.4f} {:>16.5f} {:>15.3f}'''.format(a, b, c, d))
    f_out.write('\n')

这篇关于使用format（）对齐并打印浮动列表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！