docs: def master_open():
      """master_open() -> (master_fd, slave_name)
      Open a pty master and return the fd, and the filename of the slave end.
      Deprecated, use openpty() instead."""
  
      try:
          master_fd, slave_fd = os.openpty()
      except (AttributeError, OSError):
          pass
      else:
          slave_name = os.ttyname(slave_fd)
          os.close(slave_fd)
          return master_fd, slave_name
  
      return _open_terminal()