如何使用python从文本文件中的行读取特定字符？ [英] How to read specific characters from lines in a text file using python?

问题描述

我有多个.txt文件，其中包含类似这样的多行：

I have multiple .txt files that contain multiple lines similar to this:

[class1] 1:-28 9:-315 13:-354227 2:-36.247 17:-342 8:-34 14:-3825
[class2] 14:-31.8679 7:-32.3582 2:-32.4127 1:-32.7257 8:-32.9804 16:-33.2156

我想知道如何读取之前的数字：

I want to know how to read the numbers before the :s and store them in an array.

推荐答案

>>> import re
>>> text = "[class1] 1:-28 9:-315 13:-354227 2:-36.247 17:-342 8:-34 14:-3825"
>>> map(int, re.findall(r'(\S+):\S+', text)) # You could also do map(float,...)
[1, 9, 13, 2, 17, 8, 14]

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