Use iscoroutinefunction from inspect instead of asyncio on 3.12+

discord/client.py

@@ -68,7 +68,7 @@ from .voice_client import VoiceClient
 from .http import HTTPClient
 from .state import ConnectionState
 from . import utils
-from .utils import MISSING, time_snowflake, deprecated
+from .utils import MISSING, time_snowflake, deprecated, _iscoroutinefunction
 from .object import Object
 from .backoff import ExponentialBackoff
 from .webhook import Webhook
@@ -2098,7 +2098,7 @@ class Client:
             The coroutine passed is not actually a coroutine.
         """
 
-        if not asyncio.iscoroutinefunction(coro):
+        if not _iscoroutinefunction(coro):
             raise TypeError('event registered must be a coroutine function')
 
         setattr(self, coro.__name__, coro)

discord/ext/commands/bot.py

@@ -25,7 +25,6 @@ DEALINGS IN THE SOFTWARE.
 from __future__ import annotations
 
 
-import asyncio
 import collections
 import collections.abc
 import inspect
@@ -53,7 +52,7 @@ from typing import (
 import discord
 from discord import app_commands
 from discord.app_commands.tree import _retrieve_guild_ids
-from discord.utils import MISSING, _is_submodule
+from discord.utils import MISSING, _iscoroutinefunction, _is_submodule
 
 from .core import GroupMixin
 from .view import StringView
@@ -581,7 +580,7 @@ class BotBase(GroupMixin[None]):
         TypeError
             The coroutine passed is not actually a coroutine.
         """
-        if not asyncio.iscoroutinefunction(coro):
+        if not _iscoroutinefunction(coro):
             raise TypeError('The pre-invoke hook must be a coroutine.')
 
         self._before_invoke = coro
@@ -618,7 +617,7 @@ class BotBase(GroupMixin[None]):
         TypeError
             The coroutine passed is not actually a coroutine.
         """
-        if not asyncio.iscoroutinefunction(coro):
+        if not _iscoroutinefunction(coro):
             raise TypeError('The post-invoke hook must be a coroutine.')
 
         self._after_invoke = coro
@@ -654,7 +653,7 @@ class BotBase(GroupMixin[None]):
         """
         name = func.__name__ if name is MISSING else name
 
-        if not asyncio.iscoroutinefunction(func):
+        if not _iscoroutinefunction(func):
             raise TypeError('Listeners must be coroutines')
 
         if name in self.extra_events:

discord/ext/commands/core.py

@@ -427,7 +427,7 @@ class Command(_BaseCommand, Generic[CogT, P, T]):
         /,
         **kwargs: Unpack[_CommandKwargs],
     ) -> None:
-        if not asyncio.iscoroutinefunction(func):
+        if not discord.utils._iscoroutinefunction(func):
             raise TypeError('Callback must be a coroutine.')
 
         name = kwargs.get('name') or func.__name__
@@ -1102,7 +1102,7 @@ class Command(_BaseCommand, Generic[CogT, P, T]):
             The coroutine passed is not actually a coroutine.
         """
 
-        if not asyncio.iscoroutinefunction(coro):
+        if not discord.utils._iscoroutinefunction(coro):
             raise TypeError('The error handler must be a coroutine.')
 
         self.on_error: Error[CogT, Any] = coro
@@ -1140,7 +1140,7 @@ class Command(_BaseCommand, Generic[CogT, P, T]):
         TypeError
             The coroutine passed is not actually a coroutine.
         """
-        if not asyncio.iscoroutinefunction(coro):
+        if not discord.utils._iscoroutinefunction(coro):
             raise TypeError('The pre-invoke hook must be a coroutine.')
 
         self._before_invoke = coro
@@ -1171,7 +1171,7 @@ class Command(_BaseCommand, Generic[CogT, P, T]):
         TypeError
             The coroutine passed is not actually a coroutine.
         """
-        if not asyncio.iscoroutinefunction(coro):
+        if not discord.utils._iscoroutinefunction(coro):
             raise TypeError('The post-invoke hook must be a coroutine.')
 
         self._after_invoke = coro

discord/utils.py

@@ -26,6 +26,7 @@ from __future__ import annotations
 
 import array
 import asyncio
+import inspect
 from textwrap import TextWrapper
 from typing import (
     Any,
@@ -1542,3 +1543,11 @@ class _RawReprMixin:
     def __repr__(self) -> str:
         value = ' '.join(f'{attr}={getattr(self, attr)!r}' for attr in self.__slots__)
         return f'<{self.__class__.__name__} {value}>'
+
+
+# `inspect.iscoroutinefunction()` only became equivalent to (now deprecated) `inspect.iscoroutinefunction()` in Python 3.12
+# https://github.com/python/cpython/issues/122858#issuecomment-2466239748
+if sys.version_info >= (3, 12):
+    _iscoroutinefunction = inspect.iscoroutinefunction
+else:
+    _iscoroutinefunction = asyncio.iscoroutinefunction