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asyncio, Tulip issue #136: Add get/set_debug() methods to BaseEventLoopTests.

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Add also a PYTHONASYNCIODEBUG environment variable to debug coroutines since
Python startup, to be able to debug coroutines defined directly in the asyncio
module.
This commit is contained in:
Victor Stinner 2014-02-19 23:15:02 +01:00
parent ff385b89f4
commit 0f3e6bca1b
8 changed files with 83 additions and 5 deletions
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10
Doc/library/asyncio-dev.rst
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@ -1,5 +1,7 @@
.. currentmodule:: asyncio
.. _asyncio-dev:
Develop with asyncio
====================
@ -81,10 +83,10 @@ Detect coroutine objects never scheduled
When a coroutine function is called but not passed to :func:`async` or to the
:class:`Task` constructor, it is not scheduled and it is probably a bug.
To detect such bug, set :data:`asyncio.tasks._DEBUG` to ``True``. When the
coroutine object is destroyed by the garbage collector, a log will be emitted
with the traceback where the coroutine function was called. See the
:ref:`asyncio logger <asyncio-logger>`.
To detect such bug, set the environment variable :envvar:`PYTHONASYNCIODEBUG`
to ``1``. When the coroutine object is destroyed by the garbage collector, a
log will be emitted with the traceback where the coroutine function was called.
See the :ref:`asyncio logger <asyncio-logger>`.
The debug flag changes the behaviour of the :func:`coroutine` decorator. The
debug flag value is only used when then coroutine function is defined, not when