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-rw-r--r--Lib/asyncio/base_events.py6
1 files changed, 1 insertions, 5 deletions
diff --git a/Lib/asyncio/base_events.py b/Lib/asyncio/base_events.py
index f789635..74d5670 100644
--- a/Lib/asyncio/base_events.py
+++ b/Lib/asyncio/base_events.py
@@ -814,11 +814,7 @@ class BaseEventLoop(events.AbstractEventLoop):
def set_default_executor(self, executor):
if not isinstance(executor, concurrent.futures.ThreadPoolExecutor):
- warnings.warn(
- 'Using the default executor that is not an instance of '
- 'ThreadPoolExecutor is deprecated and will be prohibited '
- 'in Python 3.9',
- DeprecationWarning, 2)
+ raise TypeError('executor must be ThreadPoolExecutor instance')
self._default_executor = executor
def _getaddrinfo_debug(self, host, port, family, type, proto, flags):