tempfile.SpooledTemporaryFile: inherit from IOBase on 3.11

python/cpython#29560

Author: JelleZijlstra

stdlib/tempfile.pyi

@@ -1,3 +1,4 @@
+import io
 import os
 import sys
 from _typeshed import Self
@@ -219,7 +220,11 @@ class _TemporaryFileWrapper(Generic[AnyStr], IO[AnyStr]):
 
 # It does not actually derive from IO[AnyStr], but it does implement the
 # protocol.
-class SpooledTemporaryFile(IO[AnyStr]):
+if sys.version_info >= (3, 11):
+    _STFBase = io.IOBase
+else:
+    _STFBase = object
+class SpooledTemporaryFile(IO[AnyStr], _STFBase):
     @property
     def encoding(self) -> str: ...  # undocumented
     @property
@@ -318,6 +323,13 @@ class SpooledTemporaryFile(IO[AnyStr]):
     def fileno(self) -> int: ...
     def flush(self) -> None: ...
     def isatty(self) -> bool: ...
+    if sys.version_info >= (3, 11):
+        def readable(self) -> bool: ...
+        def read1(self, __size: int = ...) -> AnyStr: ...
+        def readinto(self, b: WriteableBuffer) -> int: ...
+        def readinto1(self, b: WriteableBuffer) -> int: ...
+        def seekable(self) -> bool: ...
+
     def read(self, n: int = ...) -> AnyStr: ...
     def readline(self, limit: int = ...) -> AnyStr: ...
     def readlines(self, hint: int = ...) -> list[AnyStr]: ...