On Mon, Mar 19, 2012 at 8:44 AM, Stefan Behnel <stefan...@behnel.de> wrote: > Stefan Behnel, 26.02.2012 20:54: >> Amaury Forgeot d'Arc, 18.02.2012 15:41: >>> 2012/2/18 Stefan Behnel >>>> Here's an example. >>>> >>>> Python code: >>>> >>>> def print_excinfo(): >>>> print(sys.exc_info()) >>>> >>>> Cython code: >>>> >>>> from stuff import print_excinfo >>>> >>>> try: >>>> raise TypeError >>>> except TypeError: >>>> print_excinfo() >>>> >>>> With the code removed, Cython will not store the TypeError in >>>> sys.exc_info(), so the Python code cannot see it. This may seem like an >>>> unimportant use case (who uses sys.exc_info() anyway, right?), but this >>>> becomes very visible when the code that uses sys.exc_info() is not user >>>> code but CPython itself, e.g. when raising another exception or when >>>> inspecting frames. Things grow really bad here, especially in Python 3. >>> >>> I think I understand now, thanks for your example. >>> Things are a bit simpler in PyPy because these exceptions are >>> stored in the frame that is currently handling it. At least better than >>> CPython >>> which stores it in one place, and has to somehow save the state of the >>> previous frames. >>> Did you consider adding such a function to CPython? >>> "PyErr_SetCurrentFrameExceptionInfo"? >>> >>> For the record, pypy could implement it as: >>> space.getexecutioncontext().gettopframe_nohidden().last_exception = >>> operationerr >>> i.e. the thing returned by sys.exc_info(). >> >> I've dropped a patch for CPython in the corresponding tracker ticket: >> >> http://bugs.python.org/issue14098 >> >> The (trivial) implementation of the two functions is at the end of this file: >> >> http://bugs.python.org/file24613/exc_info_capi.patch >> >> Could you add them to PyPy? > > Anyone? > > Stefan
Hi Stefan. A lot of people have been completely busy at pycon. As far as I know they're trying to recover from jetlag/lots of conference. Give them a bit of breath ;-) _______________________________________________ pypy-dev mailing list pypy-dev@python.org http://mail.python.org/mailman/listinfo/pypy-dev
