Added some missing types from various stdlib stubs (#4466)

stdlib/3/multiprocessing/dummy/__init__.pyi

@@ -2,7 +2,7 @@ import array
 import threading
 import weakref
 from queue import Queue as Queue
-from typing import Any, List, Optional
+from typing import Any, Callable, Iterable, List, Mapping, Optional, Sequence
 
 JoinableQueue = Queue
 Barrier = threading.Barrier
@@ -19,7 +19,14 @@ class DummyProcess(threading.Thread):
     _pid: None
     _start_called: int
     exitcode: Optional[int]
-    def __init__(self, group=..., target=..., name=..., args=..., kwargs=...) -> None: ...
+    def __init__(
+        self,
+        group: Any = ...,
+        target: Optional[Callable[..., Any]] = ...,
+        name: Optional[str] = ...,
+        args: Iterable[Any] = ...,
+        kwargs: Mapping[str, Any] = ...,
+    ) -> None: ...
 
 Process = DummyProcess
 
@@ -32,11 +39,13 @@ class Value:
     _typecode: Any
     _value: Any
     value: Any
-    def __init__(self, typecode, value, lock=...) -> None: ...
+    def __init__(self, typecode: Any, value: Any, lock: Any = ...) -> None: ...
 
-def Array(typecode, sequence, lock=...) -> array.array[Any]: ...
+def Array(typecode: Any, sequence: Sequence[Any], lock: Any = ...) -> array.array[Any]: ...
 def Manager() -> Any: ...
-def Pool(processes=..., initializer=..., initargs=...) -> Any: ...
+def Pool(
+    processes: Optional[int] = ..., initializer: Optional[Callable[..., Any]] = ..., initargs: Iterable[Any] = ...
+) -> Any: ...
 def active_children() -> List[Any]: ...
 def current_process() -> threading.Thread: ...
 def freeze_support() -> None: ...

stdlib/3/multiprocessing/dummy/connection.pyi

@@ -1,10 +1,12 @@
 from queue import Queue
-from typing import Any, List, Optional, Tuple, TypeVar
+from types import TracebackType
+from typing import Any, List, Optional, Tuple, Type, TypeVar, Union
 
 families: List[None]
 
 _TConnection = TypeVar("_TConnection", bound=Connection)
 _TListener = TypeVar("_TListener", bound=Listener)
+_Address = Union[str, Tuple[str, int]]
 
 class Connection(object):
     _in: Any
@@ -14,8 +16,10 @@ class Connection(object):
     send: Any
     send_bytes: Any
     def __enter__(self: _TConnection) -> _TConnection: ...
-    def __exit__(self, exc_type, exc_value, exc_tb) -> None: ...
-    def __init__(self, _in, _out) -> None: ...
+    def __exit__(
+        self, exc_type: Optional[Type[BaseException]], exc_val: Optional[BaseException], exc_tb: Optional[TracebackType]
+    ) -> None: ...
+    def __init__(self, _in: Any, _out: Any) -> None: ...
     def close(self) -> None: ...
     def poll(self, timeout: float = ...) -> bool: ...
 
@@ -24,10 +28,12 @@ class Listener(object):
     @property
     def address(self) -> Optional[Queue[Any]]: ...
     def __enter__(self: _TListener) -> _TListener: ...
-    def __exit__(self, exc_type, exc_value, exc_tb) -> None: ...
-    def __init__(self, address=..., family=..., backlog=...) -> None: ...
+    def __exit__(
+        self, exc_type: Optional[Type[BaseException]], exc_val: Optional[BaseException], exc_tb: Optional[TracebackType]
+    ) -> None: ...
+    def __init__(self, address: Optional[_Address] = ..., family: Optional[int] = ..., backlog: int = ...) -> None: ...
     def accept(self) -> Connection: ...
     def close(self) -> None: ...
 
-def Client(address) -> Connection: ...
+def Client(address: _Address) -> Connection: ...
 def Pipe(duplex: bool = ...) -> Tuple[Connection, Connection]: ...