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

stdlib/3/io.pyi

@@ -20,7 +20,7 @@ class UnsupportedOperation(ValueError, OSError): ...
 class IncrementalNewlineDecoder(codecs.IncrementalDecoder):
     newlines = ...  # type: Any
     def __init__(self, *args, **kwargs) -> None: ...
-    def decode(self, input, final=False): ...
+    def decode(self, input, final=...): ...
     def getstate(self): ...
     def reset(self): ...
     def setstate(self, state): ...
@@ -42,7 +42,7 @@ class BufferedReader(_io._BufferedIOBase):
     name = ...  # type: Any
     raw = ...  # type: Any
     def __init__(self, raw, buffer_size=...) -> None: ...
-    def peek(self, size: int = -1): ...
+    def peek(self, size: int = ...): ...
 
 class BufferedWriter(_io._BufferedIOBase):
     mode = ...  # type: Any
@@ -52,17 +52,17 @@ class BufferedWriter(_io._BufferedIOBase):
 
 class BufferedRWPair(_io._BufferedIOBase):
     def __init__(self, reader, writer, buffer_size=...) -> None: ...
-    def peek(self, size: int = -1): ...
+    def peek(self, size: int = ...): ...
 
 class BufferedRandom(_io._BufferedIOBase):
     mode = ...  # type: Any
     name = ...  # type: Any
     raw = ...  # type: Any
     def __init__(self, raw, buffer_size=...) -> None: ...
-    def peek(self, size: int = -1): ...
+    def peek(self, size: int = ...): ...
 
 class BytesIO(BinaryIO):
-    def __init__(self, initial_bytes: bytes = b'') -> None: ...
+    def __init__(self, initial_bytes: bytes = ...) -> None: ...
     # TODO getbuffer
     # TODO see comments in BinaryIO for missing functionality
     def close(self) -> None: ...
@@ -71,14 +71,14 @@ class BytesIO(BinaryIO):
     def fileno(self) -> int: ...
     def flush(self) -> None: ...
     def isatty(self) -> bool: ...
-    def read(self, n: int = -1) -> bytes: ...
+    def read(self, n: int = ...) -> bytes: ...
     def readable(self) -> bool: ...
-    def readline(self, limit: int = -1) -> bytes: ...
-    def readlines(self, hint: int = -1) -> List[bytes]: ...
-    def seek(self, offset: int, whence: int = 0) -> int: ...
+    def readline(self, limit: int = ...) -> bytes: ...
+    def readlines(self, hint: int = ...) -> List[bytes]: ...
+    def seek(self, offset: int, whence: int = ...) -> int: ...
     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: ...
     @overload
     def write(self, s: bytes) -> int: ...
@@ -93,8 +93,8 @@ class BytesIO(BinaryIO):
     def __exit__(self, type, value, traceback) -> bool: ...
 
 class StringIO(TextIO):
-    def __init__(self, initial_value: str = '',
-                 newline: str = None) -> None: ...
+    def __init__(self, initial_value: str = ...,
+                 newline: str = ...) -> None: ...
     # TODO see comments in BinaryIO for missing functionality
     def close(self) -> None: ...
     @property
@@ -102,14 +102,14 @@ class StringIO(TextIO):
     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) -> int: ...
+    def readline(self, limit: int = ...) -> str: ...
+    def readlines(self, hint: int = ...) -> List[str]: ...
+    def seek(self, offset: int, whence: int = ...) -> int: ...
     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) -> int: ...
     def writelines(self, lines: Iterable[str]) -> None: ...
@@ -122,10 +122,10 @@ class StringIO(TextIO):
 class TextIOWrapper(TextIO):
     # TODO: This is actually a base class of _io._TextIOBase.
     # write_through is undocumented but used by subprocess
-    def __init__(self, buffer: IO[bytes], encoding: str = None,
-                 errors: str = None, newline: str = None,
-                 line_buffering: bool = False,
-                 write_through: bool = True) -> None: ...
+    def __init__(self, buffer: IO[bytes], encoding: str = ...,
+                 errors: str = ..., newline: str = ...,
+                 line_buffering: bool = ...,
+                 write_through: bool = ...) -> None: ...
     # TODO see comments in BinaryIO for missing functionality
     def close(self) -> None: ...
     @property
@@ -133,14 +133,14 @@ class TextIOWrapper(TextIO):
     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) -> int: ...
+    def readline(self, limit: int = ...) -> str: ...
+    def readlines(self, hint: int = ...) -> List[str]: ...
+    def seek(self, offset: int, whence: int = ...) -> int: ...
     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) -> int: ...
     def writelines(self, lines: Iterable[str]) -> None: ...