Le Wed, 14 Jan 2009 21:19:11 +0100, Willi Richert <w.rich...@gmx.net> a écrit :
> Hi, > > do you observe the same behavior with traceback.format_exc()? I've used that > always in such situations which worked all the time. > > Regards, > wr Actually yes, for the traceback object returned by sys.exc_info() is None. (sys.exc_info() --> (None,None,None)). Like if there was no exception raised, or like if it had been clear()ed. But when I don't catch the exception launched by a test program, I get the standard python error message and the prog stops -- which proves that there *is* an active exception. Simply, I cannot have it returned by sys.exc_info(). I will try more today to understand why/when/how this happens. As I said, in some circomstances all works well (sys.exc_info() returns a filled (type,value,traceback) tuple) but as of now I cannot understand why. Denis > Am Mittwoch, 14. Januar 2009 18:09:51 schrieb spir: > > Hello, > > > > I rather often use exceptions as information providers at design or debug > > time. A typical use of mine is to have a test version of methods that wrap > > standard version: > > > > def run(): > > do stuff > > that may > > raise exc > > def testRun(): > > try: > > run() > > except Error,error: > > sys.error.write(str(error)) > > > > So that I can run a bunch of (possibly failing) tests and still get all > > worthful info. Now, the drawback is that I then lose python provided > > traceback, as for any reason str(exc) does not return tracback, only the > > "message". To have the traceback I planned to catch the traceback manually. > > The aims whare: > > * be able to output the tracback prepended to the message, when useful > > * try to find a more readable (for me) format > > * filter it: e.g. print only last trace mark of each module > > If you have ideas on the best way to do this, thanks. > > > > I tried to use sys.exc_info() that returns a (type,value,traceback) tuple > > and the format_tb() function of the traceback module. *Sometimes* I get the > > traceback as expected and all is fine. But in most cases sys.exc_info() > > returns (None,None,None) like if there was absolutely no active exception. > > I cannot consistently reproduce the issue to make a clear diagnosis. > > > > Thank you, > > Denis > > > > ------ > > la vida e estranya > > _______________________________________________ > > Tutor maillist - Tutor@python.org > > http://mail.python.org/mailman/listinfo/tutor > > > > _______________________________________________ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > ------ la vida e estranya _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
