Added type declaration for multiprocessing.pool.ThreadPool and AsyncResult. (#143)

stdlib/3/multiprocessing/pool.pyi

@@ -2,5 +2,35 @@
 
 # NOTE: These are incomplete!
 
+from typing import Any, Callable, Iterable, List, Sequence
+
+class AsyncResult():
+    def get(self, timeout: float = -1) -> Any: ...
+    def wait(self, timeout: float = -1) -> None: ...
+    def ready(self) -> bool: ...
+    def successful(self) -> bool: ...
+
 class ThreadPool():
     def __init__(self, processes: int = ...) -> None: ...
+    def apply_async(self, func: Callable[..., Any],
+                    args: Sequence[Any]=(),
+                    kwds: Dict[str, Any]={},
+                    callback: Callable[..., None] = None) -> AsyncResult: ...
+    def apply(self, func: Callable[..., Any],
+              args: Sequence[Any]=(),
+              kwds: Dict[str, Any]={}) -> Any: ...
+    def map(self, func: Callable[..., Any],
+            iterable: Iterable[Any]=()) -> List[Any]: ...
+    def map_async(self, func: Callable[..., Any],
+                  iterable: Iterable[Any] = (),
+                  chunksize: int = -1,
+                  callback: Callable[..., None] = None) -> AsyncResult: ...
+    def imap(self, func: Callable[..., Any],
+             iterable: Iterable[Any]=()) -> Iterable[Any]: ...
+    def imap_async(self, func: Callable[..., Any],
+                   chunksize: int = -1,
+                   iterable: Iterable[Any]=(),
+                   callback: Callable[..., None] = None) -> AsyncResult: ...
+    def close(self) -> None: ...
+    def terminate(self) -> None: ...
+    def join(self) -> None: ...