Use "..." for attribute values, instead of None, [], {}

stdlib/3.4/asyncio/events.pyi

@@ -13,9 +13,9 @@ AF_UNSPEC = 0     # from socket
 AI_PASSIVE = 0
 
 class Handle:
-    __slots__ = [] # type: List[str]
+    __slots__ = ... # type: List[str]
     _cancelled = False
-    _args = [] # type: List[Any]
+    _args = ... # type: List[Any]
     def __init__(self, callback: Callable[[],Any], args: List[Any],
         loop: AbstractEventLoop) -> None: ...
     def __repr__(self) -> str: ...

stdlib/3.4/asyncio/futures.pyi

@@ -6,9 +6,9 @@ __all__ = ... # type: str
 _T = TypeVar('_T')
 
 class _TracebackLogger:
-    __slots__ = [] # type: List[str]
+    __slots__ = ... # type: List[str]
     exc = ...  # type: BaseException
-    tb = [] # type: List[str]
+    tb = ... # type: List[str]
     def __init__(self, exc: Any, loop: AbstractEventLoop) -> None: ...
     def activate(self) -> None: ...
     def clear(self) -> None: ...

stdlib/3.4/asyncio/tasks.pyi

@@ -16,8 +16,8 @@ def wait_for(fut: Union[Future[_T], Generator[Any, None, _T]], timeout: float, *
 
 
 class Task(Future[_T], Generic[_T]):
-    _all_tasks = None  # type: Set[Task]
-    _current_tasks = {}  # type: Dict[AbstractEventLoop, Task]
+    _all_tasks = ...  # type: Set[Task]
+    _current_tasks = ...  # type: Dict[AbstractEventLoop, Task]
     @classmethod
     def current_task(cls, loop: AbstractEventLoop = ...) -> Task: ...
     @classmethod