From 16b3a90ff1df3a4a9adee4a1809265b76c949a03 Mon Sep 17 00:00:00 2001
From: hauntsaninja <>
Date: Thu, 2 Apr 2020 00:34:20 -0700
Subject: [PATCH 1/3] functools.singledispatchmethod: add __call__ for better
 results

It doesn't actually have __call__, it does some descriptor stuff, but
this makes things work. _SingleDispatchCallable has a __call__ too,
which is what this mirrors.

Fixes #3898
---
 stdlib/3/functools.pyi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/stdlib/3/functools.pyi b/stdlib/3/functools.pyi
index 3b57064dc8df..10469c183868 100644
--- a/stdlib/3/functools.pyi
+++ b/stdlib/3/functools.pyi
@@ -86,6 +86,7 @@ if sys.version_info >= (3, 8):
         def register(self, cls: Any, method: None = ...) -> Callable[[Callable[..., _T]], Callable[..., _T]]: ...
         @overload
         def register(self, cls: Any, method: Callable[..., _T]) -> Callable[..., _T]: ...
+        def __call__(self, *args: Any, **kwargs: Any) -> _T: ...
 
     class cached_property(Generic[_T]):
         func: Callable[[Any], _T]

From 7981982672caaaa1faa84276f93d3b36b53cfa32 Mon Sep 17 00:00:00 2001
From: hauntsaninja <>
Date: Thu, 2 Apr 2020 21:01:46 -0700
Subject: [PATCH 2/3] functools.singledispatchmethod: whitelist

---
 tests/stubtest_whitelists/py38.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tests/stubtest_whitelists/py38.txt b/tests/stubtest_whitelists/py38.txt
index a1bc6b042394..78dab20a38d4 100644
--- a/tests/stubtest_whitelists/py38.txt
+++ b/tests/stubtest_whitelists/py38.txt
@@ -101,6 +101,7 @@ dis.stack_effect
 email.message.MIMEPart.as_string
 enum.Enum._generate_next_value_
 functools.partialmethod.__get__
+functools.singledispatchmethod.__call__  # A lie to reflect that the descriptor get returns a callable
 gettext.install
 gettext.translation
 hmac.compare_digest

From 63ef193991c023fcfaf1597b05d9795e5902f5a8 Mon Sep 17 00:00:00 2001
From: hauntsaninja <>
Date: Thu, 2 Apr 2020 21:23:08 -0700
Subject: [PATCH 3/3] Restart CI