asyncio, Tulip issue 126: call_soon(), call_soon_threadsafe(), call_later(),
call_at() and run_in_executor() now raise a TypeError if the callback is a
coroutine function.
diff --git a/Lib/asyncio/base_events.py b/Lib/asyncio/base_events.py
index 48b3ee3..4b7b161 100644
--- a/Lib/asyncio/base_events.py
+++ b/Lib/asyncio/base_events.py
@@ -227,6 +227,8 @@
def call_at(self, when, callback, *args):
"""Like call_later(), but uses an absolute time."""
+ if tasks.iscoroutinefunction(callback):
+ raise TypeError("coroutines cannot be used with call_at()")
timer = events.TimerHandle(when, callback, args)
heapq.heappush(self._scheduled, timer)
return timer
@@ -241,6 +243,8 @@
Any positional arguments after the callback will be passed to
the callback when it is called.
"""
+ if tasks.iscoroutinefunction(callback):
+ raise TypeError("coroutines cannot be used with call_soon()")
handle = events.Handle(callback, args)
self._ready.append(handle)
return handle
@@ -252,6 +256,8 @@
return handle
def run_in_executor(self, executor, callback, *args):
+ if tasks.iscoroutinefunction(callback):
+ raise TypeError("coroutines cannot be used with run_in_executor()")
if isinstance(callback, events.Handle):
assert not args
assert not isinstance(callback, events.TimerHandle)