>sleep --help
Usage: sleep NUMBER[SUFFIX]...
or: sleep OPTION
Pause for NUMBER seconds. SUFFIX may be `s‘ for seconds (the default),
`m‘ for minutes, `h‘ for hours or `d‘ for days. Unlike most implementations
that require NUMBER be an integer, here NUMBER may be an arbitrary floating
point number.--help display this help and exit
--version output version information and exitReport bugs to <bug-coreutils@gnu.org>.
进而可以 os.execute"sleep 1" 。
原文:https://www.cnblogs.com/RobertL/p/14193336.html