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-rw-r--r--Lib/asyncio/coroutines.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/Lib/asyncio/coroutines.py b/Lib/asyncio/coroutines.py
index c665ebe..9664ea7 100644
--- a/Lib/asyncio/coroutines.py
+++ b/Lib/asyncio/coroutines.py
@@ -7,6 +7,7 @@ import os
import sys
import traceback
import types
+import warnings
from . import base_futures
from . import constants
@@ -107,6 +108,9 @@ def coroutine(func):
If the coroutine is not yielded from before it is destroyed,
an error message is logged.
"""
+ warnings.warn('"@coroutine" decorator is deprecated since Python 3.8, use "async def" instead',
+ DeprecationWarning,
+ stacklevel=2)
if inspect.iscoroutinefunction(func):
# In Python 3.5 that's all we need to do for coroutines
# defined with "async def".