Consistently use '= ...' for optional parameters.

stdlib/2.7/io.pyi

@@ -9,16 +9,16 @@ DEFAULT_BUFFER_SIZE = 0
 from typing import List, BinaryIO, TextIO, IO, overload, Iterator, Iterable, Any, Union
 
 def open(file: Union[str, unicode, int],
-         mode: unicode = 'r', buffering: int = -1, encoding: unicode = None,
-         errors: unicode = None, newline: unicode = None,
-         closefd: bool = True) -> IO[Any]: ...
+         mode: unicode = ..., buffering: int = ..., encoding: unicode = ...,
+         errors: unicode = ..., newline: unicode = ...,
+         closefd: bool = ...) -> IO[Any]: ...
 
 class IOBase:
     # TODO
     ...
 
 class BytesIO(BinaryIO):
-    def __init__(self, initial_bytes: str = b'') -> None: ...
+    def __init__(self, initial_bytes: str = ...) -> None: ...
     # TODO getbuffer
     # TODO see comments in BinaryIO for missing functionality
     def close(self) -> None: ...
@@ -26,14 +26,14 @@ class BytesIO(BinaryIO):
     def fileno(self) -> int: ...
     def flush(self) -> None: ...
     def isatty(self) -> bool: ...
-    def read(self, n: int = -1) -> str: ...
+    def read(self, n: int = ...) -> str: ...
     def readable(self) -> bool: ...
-    def readline(self, limit: int = -1) -> str: ...
-    def readlines(self, hint: int = -1) -> List[str]: ...
-    def seek(self, offset: int, whence: int = 0) -> None: ...
+    def readline(self, limit: int = ...) -> str: ...
+    def readlines(self, hint: int = ...) -> 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: ...
+    def truncate(self, size: int = ...) -> int: ...
     def writable(self) -> bool: ...
     def write(self, s: str) -> None: ...
     def writelines(self, lines: Iterable[str]) -> None: ...
@@ -45,22 +45,22 @@ class BytesIO(BinaryIO):
     def __exit__(self, type, value, traceback) -> bool: ...
 
 class StringIO(TextIO):
-    def __init__(self, initial_value: unicode = '',
-                 newline: unicode = None) -> None: ...
+    def __init__(self, initial_value: unicode = ...,
+                 newline: unicode = ...) -> None: ...
     # TODO see comments in BinaryIO for missing functionality
     def close(self) -> None: ...
     def closed(self) -> bool: ...
     def fileno(self) -> int: ...
     def flush(self) -> None: ...
     def isatty(self) -> bool: ...
-    def read(self, n: int = -1) -> unicode: ...
+    def read(self, n: int = ...) -> unicode: ...
     def readable(self) -> bool: ...
-    def readline(self, limit: int = -1) -> unicode: ...
-    def readlines(self, hint: int = -1) -> List[unicode]: ...
-    def seek(self, offset: int, whence: int = 0) -> None: ...
+    def readline(self, limit: int = ...) -> unicode: ...
+    def readlines(self, hint: int = ...) -> List[unicode]: ...
+    def seek(self, offset: int, whence: int = ...) -> None: ...
     def seekable(self) -> bool: ...
     def tell(self) -> int: ...
-    def truncate(self, size: int = None) -> int: ...
+    def truncate(self, size: int = ...) -> int: ...
     def writable(self) -> bool: ...
     def write(self, s: unicode) -> None: ...
     def writelines(self, lines: Iterable[unicode]) -> None: ...
@@ -72,24 +72,24 @@ class StringIO(TextIO):
 
 class TextIOWrapper(TextIO):
     # write_through is undocumented but used by subprocess
-    def __init__(self, buffer: IO[str], encoding: unicode = None,
-                 errors: unicode = None, newline: unicode = None,
-                 line_buffering: bool = False,
-                 write_through: bool = True) -> None: ...
+    def __init__(self, buffer: IO[str], encoding: unicode = ...,
+                 errors: unicode = ..., newline: unicode = ...,
+                 line_buffering: bool = ...,
+                 write_through: bool = ...) -> None: ...
     # TODO see comments in BinaryIO for missing functionality
     def close(self) -> None: ...
     def closed(self) -> bool: ...
     def fileno(self) -> int: ...
     def flush(self) -> None: ...
     def isatty(self) -> bool: ...
-    def read(self, n: int = -1) -> unicode: ...
+    def read(self, n: int = ...) -> unicode: ...
     def readable(self) -> bool: ...
-    def readline(self, limit: int = -1) -> unicode: ...
-    def readlines(self, hint: int = -1) -> List[unicode]: ...
-    def seek(self, offset: int, whence: int = 0) -> None: ...
+    def readline(self, limit: int = ...) -> unicode: ...
+    def readlines(self, hint: int = ...) -> List[unicode]: ...
+    def seek(self, offset: int, whence: int = ...) -> None: ...
     def seekable(self) -> bool: ...
     def tell(self) -> int: ...
-    def truncate(self, size: int = None) -> int: ...
+    def truncate(self, size: int = ...) -> int: ...
     def writable(self) -> bool: ...
     def write(self, s: unicode) -> None: ...
     def writelines(self, lines: Iterable[unicode]) -> None: ...