Fix return types in codecs (#7199)

AlexWaygood · web-flow · commit f3ad0179f836 · 2022-02-14T14:03:58.000+01:00
diff --git a/stdlib/codecs.pyi b/stdlib/codecs.pyi
@@ -217,12 +217,10 @@ class StreamReaderWriter(TextIO):
     def readlines(self, sizehint: int | None = ...) -> list[str]: ...
     def __next__(self) -> str: ...
     def __iter__(self: Self) -> Self: ...
-    # This actually returns None, but that's incompatible with the supertype
-    def write(self, data: str) -> int: ...
+    def write(self, data: str) -> None: ...  # type: ignore[override]
     def writelines(self, list: Iterable[str]) -> None: ...
     def reset(self) -> None: ...
-    # Same as write()
-    def seek(self, offset: int, whence: int = ...) -> int: ...
+    def seek(self, offset: int, whence: int = ...) -> None: ...  # type: ignore[override]
     def __enter__(self: Self) -> Self: ...
     def __exit__(self, typ: type[BaseException] | None, exc: BaseException | None, tb: types.TracebackType | None) -> None: ...
     def __getattr__(self, name: str) -> Any: ...
@@ -253,15 +251,15 @@ class StreamRecoder(BinaryIO):
     def readlines(self, sizehint: int | None = ...) -> list[bytes]: ...
     def __next__(self) -> bytes: ...
     def __iter__(self: Self) -> Self: ...
-    def write(self, data: bytes) -> int: ...
-    def writelines(self, list: Iterable[bytes]) -> int: ...  # type: ignore  # it's supposed to return None
+    def write(self, data: bytes) -> None: ...  # type: ignore[override]
+    def writelines(self, list: Iterable[bytes]) -> None: ...
     def reset(self) -> None: ...
     def __getattr__(self, name: str) -> Any: ...
     def __enter__(self: Self) -> Self: ...
     def __exit__(self, type: type[BaseException] | None, value: BaseException | None, tb: types.TracebackType | None) -> None: ...
+    def seek(self, offset: int, whence: int = ...) -> None: ...  # type: ignore[override]
     # These methods don't actually exist directly, but they are needed to satisfy the BinaryIO
     # interface. At runtime, they are delegated through __getattr__.
-    def seek(self, offset: int, whence: int = ...) -> int: ...
     def close(self) -> None: ...
     def fileno(self) -> int: ...
     def flush(self) -> None: ...
