From 129558c3f1ae0742dfd1e515c6e572017e7ffa72 Mon Sep 17 00:00:00 2001
From: HONGJAEHYEONG <secrett2633@kakao.com>
Date: Mon, 25 Aug 2025 15:35:15 +0900
Subject: [PATCH 1/2] Use asyncio.iscoroutinefunction for Python < 3.13

---
 fastapi/dependencies/utils.py | 10 ++++++++--
 fastapi/routing.py            |  7 ++++++-
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/fastapi/dependencies/utils.py b/fastapi/dependencies/utils.py
index 081b63a8b..1b15e6459 100644
--- a/fastapi/dependencies/utils.py
+++ b/fastapi/dependencies/utils.py
@@ -1,4 +1,5 @@
 import inspect
+import sys
 from contextlib import AsyncExitStack, contextmanager
 from copy import copy, deepcopy
 from dataclasses import dataclass
@@ -73,6 +74,11 @@ from starlette.responses import Response
 from starlette.websockets import WebSocket
 from typing_extensions import Annotated, get_args, get_origin
 
+if sys.version_info >= (3, 13):  # pragma: no cover
+    from inspect import iscoroutinefunction
+else:  # pragma: no cover
+    from asyncio import iscoroutinefunction
+
 multipart_not_installed_error = (
     'Form data requires "python-multipart" to be installed. \n'
     'You can install "python-multipart" with: \n\n'
@@ -529,11 +535,11 @@ def add_param_to_fields(*, field: ModelField, dependant: Dependant) -> None:
 
 def is_coroutine_callable(call: Callable[..., Any]) -> bool:
     if inspect.isroutine(call):
-        return inspect.iscoroutinefunction(call)
+        return iscoroutinefunction(call)
     if inspect.isclass(call):
         return False
     dunder_call = getattr(call, "__call__", None)  # noqa: B004
-    return inspect.iscoroutinefunction(dunder_call)
+    return iscoroutinefunction(dunder_call)
 
 
 def is_async_gen_callable(call: Callable[..., Any]) -> bool:
diff --git a/fastapi/routing.py b/fastapi/routing.py
index 54c75a027..8b666cf12 100644
--- a/fastapi/routing.py
+++ b/fastapi/routing.py
@@ -3,6 +3,7 @@ import dataclasses
 import email.message
 import inspect
 import json
+import sys
 from contextlib import AsyncExitStack, asynccontextmanager
 from enum import Enum, IntEnum
 from typing import (
@@ -76,6 +77,10 @@ from starlette.types import AppType, ASGIApp, Lifespan, Scope
 from starlette.websockets import WebSocket
 from typing_extensions import Annotated, Doc, deprecated
 
+if sys.version_info >= (3, 13):  # pragma: no cover
+    from inspect import iscoroutinefunction
+else:  # pragma: no cover
+    from asyncio import iscoroutinefunction    
 
 def _prepare_response_content(
     res: Any,
@@ -231,7 +236,7 @@ def get_request_handler(
     embed_body_fields: bool = False,
 ) -> Callable[[Request], Coroutine[Any, Any, Response]]:
     assert dependant.call is not None, "dependant.call must be a function"
-    is_coroutine = asyncio.iscoroutinefunction(dependant.call)
+    is_coroutine = iscoroutinefunction(dependant.call)
     is_body_form = body_field and isinstance(body_field.field_info, params.Form)
     if isinstance(response_class, DefaultPlaceholder):
         actual_response_class: Type[Response] = response_class.value

From 96cbcb245188873a1c43b4ef06ac24f11aae36a9 Mon Sep 17 00:00:00 2001
From: secrett2633 <secrett2633@kakao.com>
Date: Sat, 30 Aug 2025 14:42:46 +0000
Subject: [PATCH 2/2] Apply ruff code formatting to iscoroutinefunction

---
 fastapi/routing.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fastapi/routing.py b/fastapi/routing.py
index 8b666cf12..6b1144c16 100644
--- a/fastapi/routing.py
+++ b/fastapi/routing.py
@@ -1,4 +1,3 @@
-import asyncio
 import dataclasses
 import email.message
 import inspect
@@ -80,7 +79,8 @@ from typing_extensions import Annotated, Doc, deprecated
 if sys.version_info >= (3, 13):  # pragma: no cover
     from inspect import iscoroutinefunction
 else:  # pragma: no cover
-    from asyncio import iscoroutinefunction    
+    from asyncio import iscoroutinefunction
+
 
 def _prepare_response_content(
     res: Any,