curses.ascii.unctrl(c) Return a string representation of the ASCII character c. If c is printable, this string

os.chdir(path) Change the current working directory to path. This function can support

os.wait4(pid, options) Similar to waitpid(), except a 3-element tuple, containing the child’s process id, exit

os.defpath The default search path used by exec*p* and spawn*p* if the environment doesn’t have a

os.altsep An alternative character used by the operating system to separate pathname components, or None if only

os.system(command) Execute the command (a string) in a subshell. This is implemented by calling the Standard C function system()

os.curdir The constant string used by the operating system to refer to the current directory. This is '.' for Windows

os.sched_rr_get_interval(pid) Return the round-robin quantum in seconds for the process with PID pid. A pid

os.pwrite(fd, str, offset) Write bytestring to a file descriptor, fd, from offset, leaving the file

os.wait() Wait for completion of a child process, and return a tuple containing its pid and exit status indication: a 16-bit