Update collections and typing.NamedTuple (#1276)

* Update stubs for `collections` module in both Pythons.
* Update `typing.NamedTuple` stub to have `_source` attribute.
* Fix compatibility of `deque.index` signature with supertype `Sequence`

stdlib/3/collections/__init__.pyi

@@ -52,8 +52,12 @@ _VT = TypeVar('_VT')
 
 
 # namedtuple is special-cased in the type checker; the initializer is ignored.
-def namedtuple(typename: str, field_names: Union[str, Iterable[Any]], *,
-               verbose: bool = ..., rename: bool = ..., module: str = None) -> Type[tuple]: ...
+if sys.version_info >= (3, 6):
+    def namedtuple(typename: str, field_names: Union[str, Iterable[str]], *,
+                   verbose: bool = ..., rename: bool = ..., module: Optional[str] = ...) -> Type[tuple]: ...
+else:
+    def namedtuple(typename: str, field_names: Union[str, Iterable[str]],
+                   verbose: bool = ..., rename: bool = ...) -> Type[tuple]: ...
 
 class UserDict(MutableMapping): ...
 class UserList(MutableSequence): ...
@@ -67,11 +71,15 @@ class deque(MutableSequence[_T], Generic[_T]):
                  maxlen: int = ...) -> None: ...
     def append(self, x: _T) -> None: ...
     def appendleft(self, x: _T) -> None: ...
-    def insert(self, i: int, x: _T) -> None: ...
     def clear(self) -> None: ...
+    if sys.version_info >= (3, 5):
+        def copy(self) -> deque[_T]: ...
     def count(self, x: _T) -> int: ...
     def extend(self, iterable: Iterable[_T]) -> None: ...
     def extendleft(self, iterable: Iterable[_T]) -> None: ...
+    if sys.version_info >= (3, 5):
+        def insert(self, i: int, x: _T) -> None: ...
+        def index(self, x: _T, start: int = ..., stop: int = ...) -> int: ...
     def pop(self, i: int = ...) -> _T: ...
     def popleft(self) -> _T: ...
     def remove(self, value: _T) -> None: ...
@@ -99,28 +107,28 @@ class deque(MutableSequence[_T], Generic[_T]):
     def __delitem__(self, s: slice) -> None: raise TypeError
 
     def __contains__(self, o: object) -> bool: ...
+    def __reversed__(self) -> Iterator[_T]: ...
 
-    # TODO __reversed__
+    if sys.version_info >= (3, 5):
+        def __add__(self, other: deque[_T]) -> deque[_T]: ...
+        def __mul__(self, other: int) -> deque[_T]: ...
+        def __imul__(self, other: int) -> None: ...
 
 
 class Counter(Dict[_T, int], Generic[_T]):
     @overload
-    def __init__(self) -> None: ...
+    def __init__(self, **kwargs: int) -> None: ...
     @overload
-    def __init__(self, Mapping: Mapping[_T, int]) -> None: ...
+    def __init__(self, mapping: Mapping[_T, int]) -> None: ...
     @overload
     def __init__(self, iterable: Iterable[_T]) -> None: ...
-    # TODO keyword arguments
 
     def elements(self) -> Iterator[_T]: ...
 
-    @overload
-    def most_common(self) -> List[_T]: ...
-    @overload
-    def most_common(self, n: int) -> List[_T]: ...
+    def most_common(self, n: int = ...) -> List[_T]: ...
 
     @overload
-    def subtract(self, Mapping: Mapping[_T, int]) -> None: ...
+    def subtract(self, __mapping: Mapping[_T, int]) -> None: ...
     @overload
     def subtract(self, iterable: Iterable[_T]) -> None: ...
 
@@ -134,16 +142,16 @@ class Counter(Dict[_T, int], Generic[_T]):
     @overload
     def update(self, m: Union[Iterable[_T], Iterable[Tuple[_T, int]]], **kwargs: int) -> None: ...
 
-    def __add__(self, other: typing.Counter[_T]) -> typing.Counter[_T]: ...
-    def __sub__(self, other: typing.Counter[_T]) -> typing.Counter[_T]: ...
-    def __and__(self, other: typing.Counter[_T]) -> typing.Counter[_T]: ...
-    def __or__(self, other: typing.Counter[_T]) -> typing.Counter[_T]: ...
-    def __pos__(self) -> typing.Counter[_T]: ...
-    def __neg__(self) -> typing.Counter[_T]: ...
-    def __iadd__(self, other: typing.Counter[_T]) -> typing.Counter[_T]: ...
-    def __isub__(self, other: typing.Counter[_T]) -> typing.Counter[_T]: ...
-    def __iand__(self, other: typing.Counter[_T]) -> typing.Counter[_T]: ...
-    def __ior__(self, other: typing.Counter[_T]) -> typing.Counter[_T]: ...
+    def __add__(self, other: Counter[_T]) -> Counter[_T]: ...
+    def __sub__(self, other: Counter[_T]) -> Counter[_T]: ...
+    def __and__(self, other: Counter[_T]) -> Counter[_T]: ...
+    def __or__(self, other: Counter[_T]) -> Counter[_T]: ...
+    def __pos__(self) -> Counter[_T]: ...
+    def __neg__(self) -> Counter[_T]: ...
+    def __iadd__(self, other: Counter[_T]) -> Counter[_T]: ...
+    def __isub__(self, other: Counter[_T]) -> Counter[_T]: ...
+    def __iand__(self, other: Counter[_T]) -> Counter[_T]: ...
+    def __ior__(self, other: Counter[_T]) -> Counter[_T]: ...
 
 class OrderedDict(Dict[_KT, _VT], Reversible[_KT], Generic[_KT, _VT]):
     def popitem(self, last: bool = ...) -> Tuple[_KT, _VT]: ...
@@ -154,29 +162,21 @@ class defaultdict(Dict[_KT, _VT], Generic[_KT, _VT]):
     default_factory = ...  # type: Callable[[], _VT]
 
     @overload
-    def __init__(self) -> None: ...
+    def __init__(self, **kwargs: _VT) -> None: ...
     @overload
-    def __init__(self, map: Mapping[_KT, _VT]) -> None: ...
+    def __init__(self, default_factory: Optional[Callable[[], _VT]]) -> None: ...
     @overload
-    def __init__(self, iterable: Iterable[Tuple[_KT, _VT]]) -> None: ...
-    @overload
-    def __init__(self, default_factory: Callable[[], _VT]) -> None: ...
-    @overload
-    def __init__(self, default_factory: Callable[[], _VT],
+    def __init__(self, default_factory: Optional[Callable[[], _VT]],
                  map: Mapping[_KT, _VT]) -> None: ...
     @overload
-    def __init__(self, default_factory: Callable[[], _VT],
+    def __init__(self, default_factory: Optional[Callable[[], _VT]],
                  iterable: Iterable[Tuple[_KT, _VT]]) -> None: ...
-    # TODO __init__ keyword args
 
     def __missing__(self, key: _KT) -> _VT: ...
     # TODO __reversed__
 
 if sys.version_info >= (3, 3):
     class ChainMap(MutableMapping[_KT, _VT], Generic[_KT, _VT]):
-        @overload
-        def __init__(self) -> None: ...
-        @overload
         def __init__(self, *maps: Mapping[_KT, _VT]) -> None: ...
 
         @property

stdlib/3/collections/abc.pyi

@@ -10,6 +10,7 @@ if sys.version_info >= (3, 3):
         Iterable as Iterable,
         Iterator as Iterator,
         Sized as Sized,
+        Callable as Callable,
         Mapping as Mapping,
         MutableMapping as MutableMapping,
         Sequence as Sequence,

stdlib/3/typing.pyi

@@ -495,6 +495,7 @@ def cast(tp: Type[_T], obj: Any) -> _T: ...
 # NamedTuple is special-cased in the type checker
 class NamedTuple(tuple):
     _fields = ...  # type: Tuple[str, ...]
+    _source = ...  # type: str
 
     def __init__(self, typename: str, fields: Iterable[Tuple[str, Any]] = ..., *,
                  verbose: bool = ..., rename: bool = ..., **kwargs: Any) -> None: ...