Re-organize directory structure (#4971)

See discussion in #2491

Co-authored-by: Ivan Levkivskyi <ilevkivskyi@dropbox.com>

stdlib/@python2/json.pyi

@@ -0,0 +1,93 @@
+from _typeshed import SupportsRead
+from typing import IO, Any, Callable, Dict, List, Optional, Text, Tuple, Type, Union
+
+def dumps(
+    obj: Any,
+    skipkeys: bool = ...,
+    ensure_ascii: bool = ...,
+    check_circular: bool = ...,
+    allow_nan: bool = ...,
+    cls: Optional[Type[JSONEncoder]] = ...,
+    indent: Optional[int] = ...,
+    separators: Optional[Tuple[str, str]] = ...,
+    encoding: str = ...,
+    default: Optional[Callable[[Any], Any]] = ...,
+    sort_keys: bool = ...,
+    **kwds: Any,
+) -> str: ...
+def dump(
+    obj: Any,
+    fp: Union[IO[str], IO[Text]],
+    skipkeys: bool = ...,
+    ensure_ascii: bool = ...,
+    check_circular: bool = ...,
+    allow_nan: bool = ...,
+    cls: Optional[Type[JSONEncoder]] = ...,
+    indent: Optional[int] = ...,
+    separators: Optional[Tuple[str, str]] = ...,
+    encoding: str = ...,
+    default: Optional[Callable[[Any], Any]] = ...,
+    sort_keys: bool = ...,
+    **kwds: Any,
+) -> None: ...
+def loads(
+    s: Union[Text, bytes],
+    encoding: Any = ...,
+    cls: Optional[Type[JSONDecoder]] = ...,
+    object_hook: Optional[Callable[[Dict[Any, Any]], Any]] = ...,
+    parse_float: Optional[Callable[[str], Any]] = ...,
+    parse_int: Optional[Callable[[str], Any]] = ...,
+    parse_constant: Optional[Callable[[str], Any]] = ...,
+    object_pairs_hook: Optional[Callable[[List[Tuple[Any, Any]]], Any]] = ...,
+    **kwds: Any,
+) -> Any: ...
+def load(
+    fp: SupportsRead[Union[Text, bytes]],
+    encoding: Optional[str] = ...,
+    cls: Optional[Type[JSONDecoder]] = ...,
+    object_hook: Optional[Callable[[Dict[Any, Any]], Any]] = ...,
+    parse_float: Optional[Callable[[str], Any]] = ...,
+    parse_int: Optional[Callable[[str], Any]] = ...,
+    parse_constant: Optional[Callable[[str], Any]] = ...,
+    object_pairs_hook: Optional[Callable[[List[Tuple[Any, Any]]], Any]] = ...,
+    **kwds: Any,
+) -> Any: ...
+
+class JSONDecoder(object):
+    def __init__(
+        self,
+        encoding: Union[Text, bytes] = ...,
+        object_hook: Callable[..., Any] = ...,
+        parse_float: Callable[[str], float] = ...,
+        parse_int: Callable[[str], int] = ...,
+        parse_constant: Callable[[str], Any] = ...,
+        strict: bool = ...,
+        object_pairs_hook: Callable[..., Any] = ...,
+    ) -> None: ...
+    def decode(self, s: Union[Text, bytes], _w: Any = ...) -> Any: ...
+    def raw_decode(self, s: Union[Text, bytes], idx: int = ...) -> Tuple[Any, Any]: ...
+
+class JSONEncoder(object):
+    item_separator: str
+    key_separator: str
+    skipkeys: bool
+    ensure_ascii: bool
+    check_circular: bool
+    allow_nan: bool
+    sort_keys: bool
+    indent: Optional[int]
+    def __init__(
+        self,
+        skipkeys: bool = ...,
+        ensure_ascii: bool = ...,
+        check_circular: bool = ...,
+        allow_nan: bool = ...,
+        sort_keys: bool = ...,
+        indent: Optional[int] = ...,
+        separators: Tuple[Union[Text, bytes], Union[Text, bytes]] = ...,
+        encoding: Union[Text, bytes] = ...,
+        default: Callable[..., Any] = ...,
+    ) -> None: ...
+    def default(self, o: Any) -> Any: ...
+    def encode(self, o: Any) -> str: ...
+    def iterencode(self, o: Any, _one_shot: bool = ...) -> str: ...