returncode Return code of the process when it exited. A None value indicates that the process has not terminated

AbstractEventLoop.add_signal_handler(signum, callback, *args) Add a handler for a signal. Raise

add_done_callback(fn) Add a callback to be run when the future becomes done. The callback is

class selectors.BaseSelector A BaseSelector is used to wait for I/O event readiness on multiple file objects. It

SubprocessProtocol.pipe_data_received(fd, data) Called when the child process writes data into its stdout or stderr pipe. fd

select.select(rlist, wlist, xlist[, timeout]) This is a straightforward interface to the Unix select() system call

select.kevent(ident, filter=KQ_FILTER_READ, flags=KQ_EV_ADD, fflags=0, data=0, udata=0) (Only supported on BSD.) Returns a kernel

AbstractEventLoop.call_exception_handler(context) Call the current event loop exception handler.

asyncio.ensure_future(coro_or_future, *, loop=None) Schedule the execution of a coroutine object: wrap it in a

coroutine AbstractEventLoop.create_unix_connection(protocol_factory, path, *, ssl=None, sock=None, server_hostname=None) Create