Move 2.7 to 2 (#635)

Closes #579.

stdlib/2/shelve.pyi

@@ -0,0 +1,33 @@
+from typing import Any, Dict, Iterator, List, Optional, Tuple
+import collections
+
+
+class Shelf(collections.MutableMapping):
+    def __init__(self, dict: Dict[Any, Any], protocol: Optional[int] = None, writeback: bool = ..., keyencoding: str = 'utf-8') -> None: ...
+    def __iter__(self) -> Iterator[str]: ...
+    def keys(self) -> List[Any]: ...
+    def __len__(self) -> int: ...
+    def has_key(self, key: Any) -> bool: ...
+    def __contains__(self, key: Any) -> bool: ...
+    def get(self, key: Any, default: Any = None) -> Any: ...
+    def __getitem__(self, key: Any) -> Any: ...
+    def __setitem__(self, key: Any, value: Any) -> None: ...
+    def __delitem__(self, key: Any) -> None: ...
+    def __enter__(self) -> Shelf: ...
+    def __exit__(self, type: Any, value: Any, traceback: Any) -> None: ...
+    def close(self) -> None: ...
+    def __del__(self) -> None: ...
+    def sync(self) -> None: ...
+
+class BsdDbShelf(Shelf):
+    def __init__(self, dict: Dict[Any, Any], protocol: Optional[int] = None, writeback: bool = ..., keyencoding: str = 'utf-8') -> None: ...
+    def set_location(self, key: Any) -> Tuple[str, Any]: ...
+    def next(self) -> Tuple[str, Any]: ...
+    def previous(self) -> Tuple[str, Any]: ...
+    def first(self) -> Tuple[str, Any]: ...
+    def last(self) -> Tuple[str, Any]: ...
+
+class DbfilenameShelf(Shelf):
+    def __init__(self, filename: str, flag: str = 'c', protocol: Optional[int] = None, writeback: bool = ...) -> None: ...
+
+def open(filename: str, flag: str = 'c', protocol: Optional[int] = None, writeback: bool = ...) -> DbfilenameShelf: ...