Python判斷某個使用者對某個檔案的許可權_python

在Python我們要判斷一個檔案對目前使用者有沒有讀、寫、執行許可權，我們通常可以使用os.access函數來實現，比如：

# 判斷讀許可權os.access(<my file>, os.R_OK)# 判斷寫入權限os.access(<my file>, os.W_OK)# 判斷執行許可權os.access(<my file>, os.X_OK)# 判斷讀、寫、執行許可權os.access(<my file>, os.R_OK | os.W_OK | os.X_OK)

但是如果要判斷任意一個指定的使用者對某個檔案是否有讀、寫、執行許可權，Python中是沒有預設實現的，此時我們可以通過下面的代碼斷來判斷

import osimport pwdimport stat def is_readable(cls, path, user):  user_info = pwd.getpwnam(user)  uid = user_info.pw_uid  gid = user_info.pw_gid  s = os.stat(path)  mode = s[stat.ST_MODE]  return (    ((s[stat.ST_UID] == uid) and (mode & stat.S_IRUSR > 0)) or    ((s[stat.ST_GID] == gid) and (mode & stat.S_IRGRP > 0)) or    (mode & stat.S_IROTH > 0)    )def is_writable(cls, path, user):  user_info = pwd.getpwnam(user)  uid = user_info.pw_uid  gid = user_info.pw_gid  s = os.stat(path)  mode = s[stat.ST_MODE]  return (    ((s[stat.ST_UID] == uid) and (mode & stat.S_IWUSR > 0)) or    ((s[stat.ST_GID] == gid) and (mode & stat.S_IWGRP > 0)) or    (mode & stat.S_IWOTH > 0)    )def is_executable(cls, path, user):  user_info = pwd.getpwnam(user)  uid = user_info.pw_uid  gid = user_info.pw_gid  s = os.stat(path)  mode = s[stat.ST_MODE]  return (    ((s[stat.ST_UID] == uid) and (mode & stat.S_IXUSR > 0)) or    ((s[stat.ST_GID] == gid) and (mode & stat.S_IXGRP > 0)) or    (mode & stat.S_IXOTH > 0)    )

以上就是本文的全部內容，希望對大家的學習有所協助，也希望大家多多支援雲棲社區。