Mark some types as non-hashable

Based on @JelleZijlstra's PR python#2221.

Fixes python#2148

Author: srittau

stdlib/2/__builtin__.pyi

@@ -734,7 +734,7 @@ class bytearray(MutableSequence[int], ByteString):
     def __repr__(self) -> str: ...
     def __int__(self) -> int: ...
     def __float__(self) -> float: ...
-    def __hash__(self) -> int: ...
+    __hash__: None  # type: ignore
     @overload
     def __getitem__(self, i: int) -> int: ...
     @overload
@@ -849,6 +849,7 @@ class slice(object):
     def __init__(self, stop: Any) -> None: ...
     @overload
     def __init__(self, start: Any, stop: Any, step: Any = ...) -> None: ...
+    __hash__: None  # type: ignore
     def indices(self, len: int) -> Tuple[int, int, int]: ...
 
 class tuple(Sequence[_T_co], Generic[_T_co]):
@@ -906,7 +907,7 @@ class list(MutableSequence[_T], Generic[_T]):
     def __len__(self) -> int: ...
     def __iter__(self) -> Iterator[_T]: ...
     def __str__(self) -> str: ...
-    def __hash__(self) -> int: ...
+    __hash__: None  # type: ignore
     @overload
     def __getitem__(self, i: int) -> _T: ...
     @overload
@@ -980,6 +981,7 @@ class dict(MutableMapping[_KT, _VT], Generic[_KT, _VT]):
     def __delitem__(self, v: _KT) -> None: ...
     def __iter__(self) -> Iterator[_KT]: ...
     def __str__(self) -> str: ...
+    __hash__: None  # type: ignore
 
 class set(MutableSet[_T], Generic[_T]):
     def __init__(self, iterable: Iterable[_T] = ...) -> None: ...
@@ -1016,6 +1018,7 @@ class set(MutableSet[_T], Generic[_T]):
     def __lt__(self, s: AbstractSet[object]) -> bool: ...
     def __ge__(self, s: AbstractSet[object]) -> bool: ...
     def __gt__(self, s: AbstractSet[object]) -> bool: ...
+    __hash__: None  # type: ignore
 
 class frozenset(AbstractSet[_T], Generic[_T]):
     def __init__(self, iterable: Iterable[_T] = ...) -> None: ...

stdlib/2and3/builtins.pyi

@@ -734,7 +734,7 @@ class bytearray(MutableSequence[int], ByteString):
     def __repr__(self) -> str: ...
     def __int__(self) -> int: ...
     def __float__(self) -> float: ...
-    def __hash__(self) -> int: ...
+    __hash__: None  # type: ignore
     @overload
     def __getitem__(self, i: int) -> int: ...
     @overload
@@ -849,6 +849,7 @@ class slice(object):
     def __init__(self, stop: Any) -> None: ...
     @overload
     def __init__(self, start: Any, stop: Any, step: Any = ...) -> None: ...
+    __hash__: None  # type: ignore
     def indices(self, len: int) -> Tuple[int, int, int]: ...
 
 class tuple(Sequence[_T_co], Generic[_T_co]):
@@ -906,7 +907,7 @@ class list(MutableSequence[_T], Generic[_T]):
     def __len__(self) -> int: ...
     def __iter__(self) -> Iterator[_T]: ...
     def __str__(self) -> str: ...
-    def __hash__(self) -> int: ...
+    __hash__: None  # type: ignore
     @overload
     def __getitem__(self, i: int) -> _T: ...
     @overload
@@ -980,6 +981,7 @@ class dict(MutableMapping[_KT, _VT], Generic[_KT, _VT]):
     def __delitem__(self, v: _KT) -> None: ...
     def __iter__(self) -> Iterator[_KT]: ...
     def __str__(self) -> str: ...
+    __hash__: None  # type: ignore
 
 class set(MutableSet[_T], Generic[_T]):
     def __init__(self, iterable: Iterable[_T] = ...) -> None: ...
@@ -1016,6 +1018,7 @@ class set(MutableSet[_T], Generic[_T]):
     def __lt__(self, s: AbstractSet[object]) -> bool: ...
     def __ge__(self, s: AbstractSet[object]) -> bool: ...
     def __gt__(self, s: AbstractSet[object]) -> bool: ...
+    __hash__: None  # type: ignore
 
 class frozenset(AbstractSet[_T], Generic[_T]):
     def __init__(self, iterable: Iterable[_T] = ...) -> None: ...