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authorVictor Stinner <victor.stinner@gmail.com>2014-10-12 19:37:16 (GMT)
committerVictor Stinner <victor.stinner@gmail.com>2014-10-12 19:37:16 (GMT)
commitab1c85307948219ecf15608b7f7aad41fb8c8670 (patch)
tree4218c6eb3a645b307a15a8a0ebe0fd4952d883b8 /Doc
parent980dd84f92f689f810ebf10a15f221c8d396ce4e (diff)
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asyncio doc: update debug traces
Diffstat (limited to 'Doc')
-rw-r--r--Doc/library/asyncio-dev.rst43
1 files changed, 27 insertions, 16 deletions
diff --git a/Doc/library/asyncio-dev.rst b/Doc/library/asyncio-dev.rst
index b797d6a..8ec2ff0 100644
--- a/Doc/library/asyncio-dev.rst
+++ b/Doc/library/asyncio-dev.rst
@@ -166,26 +166,35 @@ Example of unhandled exception::
Output::
Task exception was never retrieved
- future: <Task finished bug() done at asyncio/coroutines.py:139 exception=Exception('not consumed',)>
+ future: <Task finished coro=<coro() done, defined at asyncio/coroutines.py:139> exception=Exception('not consumed',)>
+ Traceback (most recent call last):
+ File "asyncio/tasks.py", line 237, in _step
+ result = next(coro)
+ File "asyncio/coroutines.py", line 141, in coro
+ res = func(*args, **kw)
+ File "test.py", line 5, in bug
+ raise Exception("not consumed")
+ Exception: not consumed
+
+:ref:`Enable the debug mode of asyncio <asyncio-debug-mode>` to get the
+traceback where the task was created. Output in debug mode::
+
+ Task exception was never retrieved
+ future: <Task finished coro=<bug() done, defined at test.py:3> exception=Exception('not consumed',) created at test.py:8>
source_traceback: Object created at (most recent call last):
- File "test.py", line 10, in <module>
+ File "test.py", line 8, in <module>
asyncio.async(bug())
- File "asyncio/tasks.py", line 510, in async
- task = loop.create_task(coro_or_future)
Traceback (most recent call last):
- File "asyncio/tasks.py", line 244, in _step
+ File "asyncio/tasks.py", line 237, in _step
result = next(coro)
- File "coroutines.py", line 78, in __next__
+ File "asyncio/coroutines.py", line 79, in __next__
return next(self.gen)
File "asyncio/coroutines.py", line 141, in coro
res = func(*args, **kw)
- File "test.py", line 7, in bug
+ File "test.py", line 5, in bug
raise Exception("not consumed")
Exception: not consumed
-:ref:`Enable the debug mode of asyncio <asyncio-debug-mode>` to get the
-traceback where the task was created.
-
There are different options to fix this issue. The first option is to chain to
coroutine in another coroutine and use classic try/except::
@@ -303,15 +312,17 @@ If a pending task is destroyed, the execution of its wrapped :ref:`coroutine
Example of log::
Task was destroyed but it is pending!
+ task: <Task pending coro=<kill_me() done, defined at test.py:5> wait_for=<Future pending cb=[Task._wakeup()]>>
+
+:ref:`Enable the debug mode of asyncio <asyncio-debug-mode>` to get the
+traceback where the task was created. Example of log in debug mode::
+
+ Task was destroyed but it is pending!
source_traceback: Object created at (most recent call last):
- File "test.py", line 17, in <module>
+ File "test.py", line 15, in <module>
task = asyncio.async(coro, loop=loop)
- File "asyncio/tasks.py", line 510, in async
- task = loop.create_task(coro_or_future)
- task: <Task pending kill_me() done at test.py:5 wait_for=<Future pending cb=[Task._wakeup()]>>
+ task: <Task pending coro=<kill_me() done, defined at test.py:5> wait_for=<Future pending cb=[Task._wakeup()] created at test.py:7> created at test.py:15>
-:ref:`Enable the debug mode of asyncio <asyncio-debug-mode>` to get the
-traceback where the task was created.
.. seealso::