From 0d165cf053e2d640c71f73953fdb81de265478dd Mon Sep 17 00:00:00 2001
From: Colin Watson <cjwatson@debian.org>
Date: Mon, 24 Nov 2025 22:23:53 +0000
Subject: [PATCH 1/2] [channels] Make URLRouter.routes a Collection

`list` is invariant, which made this type inconvenient in practice.
Each of the routes is either a pattern or another router.
---
 stubs/channels/channels/routing.pyi | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/stubs/channels/channels/routing.pyi b/stubs/channels/channels/routing.pyi
index d2a0655d43ce..2010a84935ff 100644
--- a/stubs/channels/channels/routing.pyi
+++ b/stubs/channels/channels/routing.pyi
@@ -1,3 +1,4 @@
+from collections.abc import Collection
 from typing import Any, type_check_only
 
 from asgiref.typing import ASGIReceiveCallable, ASGISendCallable, Scope
@@ -19,9 +20,9 @@ class _ExtendedURLPattern(URLPattern):
     callback: _ASGIApplicationProtocol | URLRouter
 
 class URLRouter:
-    routes: list[_ExtendedURLPattern | URLRouter]
+    routes: Collection[_ExtendedURLPattern | URLRouter]
 
-    def __init__(self, routes: list[_ExtendedURLPattern | URLRouter]) -> None: ...
+    def __init__(self, routes: Collection[_ExtendedURLPattern | URLRouter]) -> None: ...
     async def __call__(self, scope: Scope, receive: ASGIReceiveCallable, send: ASGISendCallable) -> None: ...
 
 class ChannelNameRouter:

From 79675e2f027b9bf2c516c6d3e5d90f5084d796dd Mon Sep 17 00:00:00 2001
From: Colin Watson <cjwatson@debian.org>
Date: Tue, 25 Nov 2025 10:05:56 +0000
Subject: [PATCH 2/2] [channels] Weaken a couple of other list parameter types

---
 stubs/channels/channels/utils.pyi  |  5 +++--
 stubs/channels/channels/worker.pyi | 10 ++++++++--
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/stubs/channels/channels/utils.pyi b/stubs/channels/channels/utils.pyi
index 0e0818abbbb6..3e1862723268 100644
--- a/stubs/channels/channels/utils.pyi
+++ b/stubs/channels/channels/utils.pyi
@@ -1,4 +1,4 @@
-from collections.abc import Awaitable, Callable
+from collections.abc import Awaitable, Callable, Sequence
 from typing import Any, Protocol, type_check_only
 from typing_extensions import TypeAlias
 
@@ -6,7 +6,8 @@ from asgiref.typing import ASGIApplication, ASGIReceiveCallable
 
 def name_that_thing(thing: object) -> str: ...
 async def await_many_dispatch(
-    consumer_callables: list[Callable[[], Awaitable[ASGIReceiveCallable]]], dispatch: Callable[[dict[str, Any]], Awaitable[None]]
+    consumer_callables: Sequence[Callable[[], Awaitable[ASGIReceiveCallable]]],
+    dispatch: Callable[[dict[str, Any]], Awaitable[None]],
 ) -> None: ...
 
 # Defines a generic ASGI middleware protocol.
diff --git a/stubs/channels/channels/worker.pyi b/stubs/channels/channels/worker.pyi
index a20b5feec275..3bf5c76b8d71 100644
--- a/stubs/channels/channels/worker.pyi
+++ b/stubs/channels/channels/worker.pyi
@@ -1,13 +1,19 @@
+from collections.abc import Collection
+
 from asgiref.server import StatelessServer
 from channels.layers import BaseChannelLayer
 from channels.utils import _ChannelApplication
 
 class Worker(StatelessServer):
-    channels: list[str]
+    channels: Collection[str]
     channel_layer: BaseChannelLayer
 
     def __init__(
-        self, application: _ChannelApplication, channels: list[str], channel_layer: BaseChannelLayer, max_applications: int = 1000
+        self,
+        application: _ChannelApplication,
+        channels: Collection[str],
+        channel_layer: BaseChannelLayer,
+        max_applications: int = 1000,
     ) -> None: ...
     async def handle(self) -> None: ...
     async def listener(self, channel: str) -> None: ...