如何从文件中删除特定文本？

Question

我正在尝试从此字幕文件中删除某些特定的上下文，但是当我尝试这样做时，它会将文件完全擦除为空白。请帮我。谢谢。

x=open("text.txt",'rb')for sub in x:
sub=sub.strip()
if sub.startswith('0',0,28): 
    x.remove()

//字幕文件

https://hastebin.com/ulupuwibix.makefile

Answer 1

您可以使用正则表达式替换它。

正则表达式模式：[0-9]+\n[0-9]{2}:[0-9]{2}:[0-9]{2},[0-9]+ --> [0-9]{2}:[0-9]{2}:[0-9]{2},[0-9]+\n

import re

with open("text.txt") as file:
    txt = re.sub(r"[0-9]+\n[0-9]{2}:[0-9]{2}:[0-9]{2},[0-9]+ --> [0-9]{2}:[0-9]{2}:[0-9]{2},[0-9]+\n", "", file.read())

print(txt)

text.txt的内容示例

1
00:00:26,720 --> 00:00:31,720
Subtitles by <font color="#ff0000">explosiveskull</font>
Sync by <font color="#00ffff">GoldenBeard</font>

2
00:00:43,752 --> 00:00:45,621
(MEN CHATTERING INDISTINCTLY)

输出

Subtitles by <font color="#ff0000">explosiveskull</font>
Sync by <font color="#00ffff">GoldenBeard</font>

(MEN CHATTERING INDISTINCTLY)

Answer 2

打开文件并将文件内容存储在字符串中：

with open("test.txt") as x:    
    data = x.read() 

现在，您可以根据需要删除/向该字符串添加任何数据：

// operations that you wish to perform on the content

在w +模式下再次将其打开，并将修改后的内容写入其中：

with open("test.txt", w+) as x:    
    data = x.write(content)