Stubs for sched (#1204)

* stubs for sched

* can't use NamedTuple classes

stdlib/2and3/sched.pyi

@@ -0,0 +1,29 @@
+# Stub for sched (Python 2 and 3)
+
+import sys
+from typing import Any, Callable, Dict, List, NamedTuple, Text, Tuple
+
+Event = NamedTuple('Event', [
+    ('time', float),
+    ('priority', Any),
+    ('action', Callable[..., Any]),
+    ('argument', Tuple[Any, ...]),
+    ('kwargs', Dict[Text, Any]),
+])
+
+class scheduler:
+    if sys.version_info >= (3, 3):
+        def __init__(self, timefunc: Callable[[], float] = ..., delayfunc: Callable[[float], None] = ...) -> None: ...
+        def enterabs(self, time: float, priority: Any, action: Callable[..., Any], argument: Tuple[Any, ...] = ..., kwargs: Dict[str, Any] = ...) -> Event: ...
+        def enter(self, delay: float, priority: Any, action: Callable[..., Any], argument: Tuple[Any, ...] = ..., kwargs: Dict[str, Any] = ...) -> Event: ...
+        def run(self, blocking: bool = ...) -> float: ...
+    else:
+        def __init__(self, timefunc: Callable[[], float], delayfunc: Callable[[float], None]) -> None: ...
+        def enterabs(self, time: float, priority: Any, action: Callable[..., Any], argument: Tuple[Any, ...]) -> Event: ...
+        def enter(self, delay: float, priority: Any, action: Callable[..., Any], argument: Tuple[Any, ...]) -> Event: ...
+        def run(self) -> float: ...
+
+    def cancel(self, event: Event) -> None: ...
+    def empty(self) -> bool: ...
+    @property
+    def queue(self) -> List[Event]: ...