code: def create_pipe(backend_p):
          
          return Zsock(lib.zsys_create_pipe(byref(zsock_p.from_param(backend_p))), False)
docs: Create a pipe, which consists of two PAIR sockets connected over inproc.
  The pipe is configured to use the zsys_pipehwm setting. Returns the
  frontend socket successful, NULL if failed.