rework directory hierarchy

builtins/2.7/cStringIO.pyi

@@ -0,0 +1,39 @@
+# Stubs for cStringIO (Python 2.7)
+# See https://docs.python.org/2/library/stringio.html
+
+from typing import IO, List, Iterable, Iterator, Any, Union
+
+class StringIO(IO[str]):
+    softspace = ... # type: int
+
+    def __init__(self, s: str = None) -> None: ...
+    def getvalue(self) -> str: ...
+    def close(self) -> None: ...
+    @property
+    def closed(self) -> bool: ...
+    def fileno(self) -> int: ...
+    def flush(self) -> None: ...
+    def isatty(self) -> bool: ...
+    def read(self, size: int = -1) -> str: ...
+    def readable(self) -> bool: ...
+    def readline(self, size: int = -1) -> str: ...
+    def readlines(self, hint: int = -1) -> List[str]: ...
+    def seek(self, offset: int, whence: int = ...) -> None: ...
+    def seekable(self) -> bool: ...
+    def tell(self) -> int: ...
+    def truncate(self, size: int = None) -> int:
+        raise IOError()
+    def writable(self) -> bool: ...
+    def writelines(self, lines: Iterable[str]) -> None: ...
+    def next(self) -> str: ...
+    def __iter__(self) -> "InputType": ...
+    def __enter__(self) -> Any: ...
+    def __exit__(self, exc_type: type, exc_val: Any, exc_tb: Any) -> Any: ...
+    # only StringO:
+    def reset() -> None: ...
+    def write(self, b: Union[str, unicode]) -> None: ...
+    def writelines(self, lines: Iterable[Union[str, unicode]]) -> None: ...
+
+InputType = StringIO
+OutputType = StringIO
+