读取文件中的值,并根据它们的类型在Python中进行转换。

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英文:

read values in a file and convert them according to their type in python

问题

我有以下文件:

10              	10              	11              	10530       	18          	100         	0           	Open  	;
11              	11              	12              	5280        	14          	100         	0           	Open  	;
12              	12              	13              	5280        	10          	100         	0           	Open  	;
21              	21              	22              	5280        	10          	100         	0           	Open  	;

我按照以下方式读取文件:

with open(file) as f:
    values = line.rstrip().split()

这是第一行的结果:

values
Out: ['10', '10', '11', '10530', '18', '100', '0', 'Open']

我想将其中一些转换为整数、浮点数或保持为字符串。

最简单的方法可能是:

values[0] = int(values[0])
values[1] = int(values[1])
values[2] = int(values[2])
values[3] = float(values[3])
values[4] = float(values[4])
values[5] = float(values[5])
values[6] = float(values[6])
values[7] = values[7]

你有没有其他更紧凑或更智能的方法来实现这个目标?

例如,我可以在文件中将要转换为浮点数的值写成浮点数,通过添加一个小数点,例如,将2写成2.0。然而,我再次陷入了转换的问题。

感谢任何形式的帮助。

英文:

I have the following file:

 10              	10              	11              	10530       	18          	100         	0           	Open  	;
 11              	11              	12              	5280        	14          	100         	0           	Open  	;
 12              	12              	13              	5280        	10          	100         	0           	Open  	;
 21              	21              	22              	5280        	10          	100         	0           	Open  	;

I read the file as follow:

 with open(file) as f:
 values = line.rstrip().split()

this is the outcome for the first line:

values
Out  [2]: ['10', '10', '11', '10530', '18', '100', '0', 'Open']

I would like to convert some of them to integer, float or keep them as string.

The easiest way could be the following:

values[0]  = int(values[0])
values[1]  = int(values[1])
values[2]  = int(values[2])
values[3]  = float(values[3])
values[4]  = float(values[4])
values[5]  = float(values[5])
values[6]  = float(values[6])
values[7]  = values[7]

Do you have in mind other more compact or smarter way to do that?

I could for example write the values that I want to convert to float as float in the file by adding a dot. For example, 2 as 2.0.
However, I am stuck again with the conversion.

Thanks for any kind of help

答案1

得分: 1

我认为你正在寻找的可能是这样的代码:

values[0:2] = [int(values[i]) for i in range(3)]
values[3:6] = [float(values[i]) for i in range(3, 7)]

这样做可以避免重复编写代码行,尽管这不是最佳实践。
如果你想学习更好的文件解析方法,我建议你学习如何使用 pandas

英文:

I think what you're looking for might be something like this:

values[0:2] = [int(values[i]) for i in range(3)]
values[3:6] = [float(values[i]) for i in range(3, 7)]

This should save you duplicating your code lines although it isn't the best practice to do it.
If you're into learning a better way to do this kind of file parsing I would recommend you to learn how to use pandas

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  • 本文由 发表于 2023年5月29日 14:30:50
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