permissions# 用于修改文件和目录权限的磁盘实用工具函数。 函数# make_writable(path) make_read_only(path) recursive_make_writable(path[, max_tries]) make_executable(path) is_executable(path) make_writable(path)# make_read_only(path)# recursive_make_writable(path, max_tries=MAX_TRIES)# make_executable(path)# is_executable(path)#