使用python删除文本文件中“1”和“，”之间多行中的多个字符，以及如何打开该文件？

Question

我的文本文件包含数百行如下内容：

#EXTINF:-1 tvg-id="" tvg-name="" tvg-language="Arabic" tvg-logo="http://jascotvs.com/u,Al Alamiya
http://82.212.74.98:8000/live/7815.
#EXTINF:-1 tvg-id="" tvg-name="" tvg-language="Arabic" tvg-logo="" tvg-country="MA" tvg-u,Aoula
https://cdnamd-hls-globecast.akamaized.net/live/ramdisk/al_aoula_inter/hls_snrt/al_aoula_inter.
#EXTINF:-1 tvg-id="" tvg-name="" tvg-language="Arabic",Laayou
http://cdn-hls.globecast.sy/live/ramdisk/al_aoula_laayoune/hls_snrt/index.

我需要用python打开文本文件，只删除“-1”和“，”之间的字符，所以我要删除“-1”和“，”之间的字符的第一行，然后是第二行的url，我不想编辑它，不包含“-1”或“，” 在这之后是第三行，其中包含'-1'和''，之间的字符，我想删除，在这之后是第四行，我不想编辑它，不包含'-1'或''，' 等等……
所以，如果有人能帮助我，我将非常感激

Answer 1

以下是由于Andrej的原因，将'-1'和''.'从删除中排除的答案：

import re with open('f.txt', 'r', encoding='UTF8') as f_in, open('data_out.txt', 'w', encoding='UTF8') as f_out: txt = re.sub(r'(?<=^#EXTINF:-1)(.*,)', ',', f_in.read(), flags=re.M) print(txt, file=f_out, end='')

Answer 2

您可以为任务（regex101 demo）使用re模块

例如：

当data.txt包含：

#EXTINF:-1 tvg-id="" tvg-name="" tvg-language="Arabic" tvg-logo="http://jascotvs.com/u,Al Alamiya
http://82.212.74.98:8000/live/7815.
#EXTINF:-1 tvg-id="" tvg-name="" tvg-language="Arabic" tvg-logo="" tvg-country="MA" tvg-u,Aoula
https://cdnamd-hls-globecast.akamaized.net/live/ramdisk/al_aoula_inter/hls_snrt/al_aoula_inter.
#EXTINF:-1 tvg-id="" tvg-name="" tvg-language="Arabic",Laayou
http://cdn-hls.globecast.sy/live/ramdisk/al_aoula_laayoune/hls_snrt/index

然后：

import re

with open('data.txt', 'r') as f_in, open('data_out.txt', 'w') as f_out:
    txt = re.sub(r'(?<=^#EXTINF:)(-1.*,)', '', f_in.read(), flags=re.M)
    print(txt, file=f_out, end='')

产生data_out.txt：

#EXTINF:Al Alamiya
http://82.212.74.98:8000/live/7815.
#EXTINF:Aoula
https://cdnamd-hls-globecast.akamaized.net/live/ramdisk/al_aoula_inter/hls_snrt/al_aoula_inter.
#EXTINF:Laayou
http://cdn-hls.globecast.sy/live/ramdisk/al_aoula_laayoune/hls_snrt/index