From bbd2af8e4f6f43661d2eb69c2b0e0e5dccf94dfc Mon Sep 17 00:00:00 2001
From: Rune Tynan <runetynan@gmail.com>
Date: Fri, 18 Sep 2020 17:22:52 -0400
Subject: [PATCH 1/2] Add _TemporaryFileWrapper to tempfile.pyi

---
 stdlib/3/tempfile.pyi                    | 31 ++++++++++++++++++++++++
 tests/stubtest_whitelists/py3_common.txt |  2 ++
 2 files changed, 33 insertions(+)

diff --git a/stdlib/3/tempfile.pyi b/stdlib/3/tempfile.pyi
index 3c46be28483a..12c30fdf40a1 100644
--- a/stdlib/3/tempfile.pyi
+++ b/stdlib/3/tempfile.pyi
@@ -164,6 +164,37 @@ else:
             dir: Optional[_DirT[AnyStr]] = ...,
         ) -> IO[Any]: ...
 
+class _TemporaryFileWrapper(IO[str]):
+    file: IO[str]
+    name: Any
+    delete: bool
+    def __init__(self, file: IO[str], name: Any, delete: bool = ...) -> None: ...
+    def __enter__(self) -> _TemporaryFileWrapper: ...
+    def __exit__(self, exc: Optional[Type[BaseException]], value: Optional[BaseException], tb: Optional[TracebackType]) -> Optional[bool]: ...
+    def __getattr__(self, name: str) -> Any: ...
+    def close(self) -> None: ...
+    def unlink(self, path: str) -> None: ...
+    # These methods don't exist directly on this object, but
+    # are delegated to the underlying IO object through __getattr__.
+    # We need to add them here so that this class is concrete.
+    def __iter__(self) -> Iterator[str]: ...
+    def __next__(self) -> str: ...
+    def fileno(self) -> int: ...
+    def flush(self) -> None: ...
+    def isatty(self) -> bool: ...
+    def next(self) -> str: ...
+    def read(self, n: int = ...) -> str: ...
+    def readable(self) -> bool: ...
+    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: Optional[int] = ...) -> int: ...
+    def writable(self) -> bool: ...
+    def write(self, s: str) -> int: ...
+    def writelines(self, lines: Iterable[str]) -> None: ...
+
 # It does not actually derive from IO[AnyStr], but it does implement the
 # protocol.
 class SpooledTemporaryFile(IO[AnyStr]):
diff --git a/tests/stubtest_whitelists/py3_common.txt b/tests/stubtest_whitelists/py3_common.txt
index 375f9002cf32..564463b2a211 100644
--- a/tests/stubtest_whitelists/py3_common.txt
+++ b/tests/stubtest_whitelists/py3_common.txt
@@ -427,6 +427,8 @@ builtins.quit
 # Builtins that mypy pretends exist
 builtins.reveal_locals
 builtins.reveal_type
+# Dynamically specified by __getattr__, and thus don't exist on the class
+tempfile._TemporaryFileWrapper.[\w_]+
 # Various classes in typing aren't types at runtime. In addition, mypy thinks some special forms are tautologically defined.
 typing.[A-Z]\w+
 # We can't distinguish not having a default value from having a default value of inspect.Parameter.empty

From bd3b1b8813ce71cf532ec45fe31a0dc25d723628 Mon Sep 17 00:00:00 2001
From: Rune Tynan <runetynan@gmail.com>
Date: Fri, 18 Sep 2020 17:26:14 -0400
Subject: [PATCH 2/2] Black/Isort

---
 stdlib/3/tempfile.pyi | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/stdlib/3/tempfile.pyi b/stdlib/3/tempfile.pyi
index 12c30fdf40a1..80040d940af4 100644
--- a/stdlib/3/tempfile.pyi
+++ b/stdlib/3/tempfile.pyi
@@ -170,7 +170,9 @@ class _TemporaryFileWrapper(IO[str]):
     delete: bool
     def __init__(self, file: IO[str], name: Any, delete: bool = ...) -> None: ...
     def __enter__(self) -> _TemporaryFileWrapper: ...
-    def __exit__(self, exc: Optional[Type[BaseException]], value: Optional[BaseException], tb: Optional[TracebackType]) -> Optional[bool]: ...
+    def __exit__(
+        self, exc: Optional[Type[BaseException]], value: Optional[BaseException], tb: Optional[TracebackType]
+    ) -> Optional[bool]: ...
     def __getattr__(self, name: str) -> Any: ...
     def close(self) -> None: ...
     def unlink(self, path: str) -> None: ...