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Why can't raw strings end with a backslash

More precisely, they can't end with an odd number of backslashes: the unpaired backslash at the end escapes the closing quote character, leaving an unterminated string. Raw stri...

Python 中的字符串

Strings are immutable, which means that no matter what operation you do on a string, you will always produce a new string object, rather than mutating the existing string. 字符串...

CentOS用户和组管理

一.组管理 1. 添加用户组 groupadd 2. 删除用户组 groupdel 3. 修改用户组 groupmod 4. 切换用户组 newgrp <groupname> 如果一个用户同时属于多个用户组,可以用 newgrp 命令切换至目的组,...

统计文件夹下文件总数

import os count = 0 path = r'C:\Users\xxxx\Desktop\top' for root, dirs, files in os.walk(path): #print files fileLength = len(files) if fileLength != 0: co...

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