From 0f7853c3568791f0e93ece57d2fc750dbc93b963 Mon Sep 17 00:00:00 2001
From: David Montague <david@exactrics.com>
Date: Mon, 14 Oct 2019 02:34:51 -0700
Subject: [PATCH] Add type hint for run_in_threadpool return type

---
 starlette/concurrency.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/starlette/concurrency.py b/starlette/concurrency.py
index 56db3db3..c5ac039e 100644
--- a/starlette/concurrency.py
+++ b/starlette/concurrency.py
@@ -8,10 +8,12 @@ try:
 except ImportError:  # pragma: no cover
     contextvars = None  # type: ignore
 
+T = typing.TypeVar("T")
+
 
 async def run_in_threadpool(
-    func: typing.Callable, *args: typing.Any, **kwargs: typing.Any
-) -> typing.Any:
+    func: typing.Callable[..., T], *args: typing.Any, **kwargs: typing.Any
+) -> T:
     loop = asyncio.get_event_loop()
     if contextvars is not None:  # pragma: no cover
         # Ensure we run in the same context
-- 
2.47.2