The modules described in this chapter provide interfaces to features that are unique to the Unix operating system, or in some cases to some or many variants of it. Here’s an overview:
posix
pwd
spwd
grp
crypt
termios
tty
pty
fcntl
ioctl
pipes
resource
nis
syslog
winsound — Windows 声音播放接口
winsound
posix — 最常见的 POSIX 系统调用
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