asyncio.events: various fixes (#3931)

- connect_accepted_socket isn't a member of AbstractEventLoop, only
BaseEventLoop
- fix types of arguments with defaults. some of these functions could
have their signatures improved with overloads to reduce false negatives
- correctly mark a positional-only argument
- remove abstractmethod from methods that don't have abstractmethod and
go unimplemented in practice

tests/stubtest_whitelists/py35.txt

@@ -15,6 +15,7 @@ asyncio.futures._TracebackLogger.__init__
 asyncio.protocols.BufferedProtocol
 asyncio.runners
 asyncio.tasks.Task.__init__
+asyncio.unix_events._UnixSelectorEventLoop.create_unix_server
 bdb.GENERATOR_AND_COROUTINE_FLAGS
 builtins.str.maketrans
 cmath.log

tests/stubtest_whitelists/py36.txt

@@ -8,6 +8,7 @@ asyncio.futures._TracebackLogger.__init__
 asyncio.protocols.BufferedProtocol
 asyncio.runners
 asyncio.tasks.Task._wakeup
+asyncio.unix_events._UnixSelectorEventLoop.create_unix_server
 builtins.str.maketrans
 cmath.log
 codecs.StreamRecoder.seek

tests/stubtest_whitelists/py37.txt

@@ -2,14 +2,12 @@ _bisect.bisect
 _bisect.insort
 _tracemalloc._get_object_traceback
 _tracemalloc.start
-asyncio.AbstractEventLoop.create_unix_server
 asyncio.AbstractEventLoop.sock_sendfile
 asyncio.Future.__init__
 asyncio.Future._callbacks
 asyncio.Future._schedule_callbacks
 asyncio.Handle.__init__
 asyncio.TimerHandle.__init__
-asyncio.events.AbstractEventLoop.create_unix_server
 asyncio.events.AbstractEventLoop.sock_sendfile
 asyncio.events.Handle.__init__
 asyncio.events.TimerHandle.__init__
@@ -17,8 +15,6 @@ asyncio.exceptions
 asyncio.futures.Future.__init__
 asyncio.futures.Future._callbacks
 asyncio.futures.Future._schedule_callbacks
-asyncio.proactor_events.BaseProactorEventLoop.create_unix_server
-asyncio.selector_events.BaseSelectorEventLoop.create_unix_server
 builtins.dict.get
 builtins.reversed
 builtins.str.maketrans

tests/stubtest_whitelists/py38.txt

@@ -5,7 +5,6 @@ _thread._ExceptHookArgs
 _tracemalloc._get_object_traceback
 _tracemalloc.start
 _weakref.getweakrefcount
-asyncio.AbstractEventLoop.create_unix_server
 asyncio.AbstractEventLoop.sock_sendfile
 asyncio.Future.__init__
 asyncio.Future._callbacks
@@ -19,21 +18,16 @@ asyncio.Task.set_exception
 asyncio.Task.set_name
 asyncio.Task.set_result
 asyncio.TimerHandle.__init__
-asyncio._set_running_loop
-asyncio.events.AbstractEventLoop.create_unix_server
 asyncio.events.AbstractEventLoop.sock_sendfile
 asyncio.events.Handle.__init__
 asyncio.events.TimerHandle.__init__
-asyncio.events._set_running_loop
 asyncio.futures.Future.__init__
 asyncio.futures.Future._callbacks
 asyncio.futures.Future._schedule_callbacks
 asyncio.futures.Future.remove_done_callback
 asyncio.futures.Future.set_exception
 asyncio.futures.Future.set_result
-asyncio.proactor_events.BaseProactorEventLoop.create_unix_server
 asyncio.proactor_events._ProactorBasePipeTransport.__del__
-asyncio.selector_events.BaseSelectorEventLoop.create_unix_server
 asyncio.tasks.Task.remove_done_callback
 asyncio.tasks.Task.set_exception
 asyncio.tasks.Task.set_name

tests/stubtest_whitelists/py3_common.txt

@@ -15,8 +15,6 @@ abc.abstractstaticmethod
 aifc.open
 aifc.openfp
 argparse.Namespace.__getattr__
-asyncio.AbstractEventLoop.connect_accepted_socket
-asyncio.AbstractEventLoop.create_unix_connection
 asyncio.BaseChildWatcher
 asyncio.BaseEventLoop.subprocess_exec
 asyncio.Condition.acquire
@@ -32,8 +30,6 @@ asyncio.Task.get_stack
 asyncio.Task.print_stack
 asyncio.WriteTransport.set_write_buffer_limits
 asyncio.base_events.BaseEventLoop.subprocess_exec
-asyncio.events.AbstractEventLoop.connect_accepted_socket
-asyncio.events.AbstractEventLoop.create_unix_connection
 asyncio.futures.Future._copy_state
 asyncio.futures.wrap_future
 asyncio.locks.Condition.acquire
@@ -41,11 +37,9 @@ asyncio.locks.Condition.locked
 asyncio.locks.Condition.release
 asyncio.open_connection
 asyncio.open_unix_connection
-asyncio.proactor_events.BaseProactorEventLoop.create_unix_connection
 asyncio.proactor_events.BaseProactorEventLoop.sock_recv
 asyncio.queues.Queue._consume_done_getters
 asyncio.queues.Queue._consume_done_putters
-asyncio.selector_events.BaseSelectorEventLoop.create_unix_connection
 asyncio.selector_events.BaseSelectorEventLoop.sock_recv
 asyncio.sleep
 asyncio.start_unix_server
@@ -59,8 +53,6 @@ asyncio.tasks.Task.print_stack
 asyncio.tasks.sleep
 asyncio.transports.WriteTransport.set_write_buffer_limits
 asyncio.transports._FlowControlMixin.set_write_buffer_limits
-asyncio.unix_events._UnixSelectorEventLoop.create_unix_connection
-asyncio.unix_events._UnixSelectorEventLoop.create_unix_server
 asyncio.windows_events
 asyncio.windows_utils
 asyncio.wrap_future