題目：
1.首先將文件：/etc/selinux/config 進行備份 文件名為 /etc/selinux/config.bak
2.再文件：/etc/selinux/config 中的enforcing 替換為 disabled
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# This file controls the state of SELinux on the system.# SELINUX= can take one of these three values:# enforcing - SELinux security policy is enforced.# permissive - SELinux prints warnings instead of enforcing.# disabled - No SELinux policy is loaded.SELINUX=disabled# SELINUXTYPE= can take one of three two values:# targeted - Targeted processes are protected,# minimum - Modification of targeted policy. Only selected processes are protected. # mls - Multi Level Security protection.SELINUXTYPE=enforcing |
•方法一：用replace
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import osimport shutildef selinux_config(): """ 關閉SELINUX 修改文件內容 :return: """ file_selinux = '/etc/selinux/config' backup_file_selinux = file_selinux + '.bak' temp_file_selinux = file_selinux + '.temp' if not os.path.exists(backup_file_selinux): shutil.copy2(file_selinux, backup_file_selinux) with open(file_selinux, mode='r') as fr, open(temp_file_selinux, mode='w') as fw: origin_line = 'SELINUX=enforcing' update_line = 'SELINUX=disabled' for line in fr: fw.write(line.replace(origin_line, update_line)) os.remove(file_selinux) os.rename(temp_file_selinux, file_selinux)if __name__ == '__main__': selinux_config() |
•方法二：用re.sub
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#! /usr/bin/env python# -*- coding: utf-8 -*-import osimport reimport shutildef selinux_config(): """ 關閉SELINUX 修改文件內容 :return: """ file_selinux = '/etc/selinux/config' backup_file_selinux = file_selinux + '.bak' temp_file_selinux = file_selinux + '.temp' if not os.path.exists(backup_file_selinux): shutil.copy2(file_selinux, backup_file_selinux) with open(file_selinux, mode='r') as fr, open(temp_file_selinux, mode='w') as fw: origin_line = 'SELINUX=enforcing' update_line = 'SELINUX=disabled' for line in fr: re_sub_list = re.sub(origin_line, update_line, line) # 這里用re.sub進行替換后放入 re_sub_list中 fw.writelines(re_sub_list) # 將列表中的每一行進行寫入。writelines是將序列對象中的每一行進行寫入。 os.remove(file_selinux) os.rename(temp_file_selinux, file_selinux)if __name__ == '__main__': selinux_config() |
總結
以上所述是小編給大家介紹的Python文件操作中進行字符串替換的方法（保存到新文件/當前文件） ,希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對服務器之家網站的支持！
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原文鏈接：https://www.cnblogs.com/a72hongjie/articles/9161913.html
