Extracting the traceback

Evan Klitzke evan at yelp.com
Wed Aug 22 03:11:17 CEST 2007


On 8/21/07, codesite-noreply <billiejoex at gmail.com> wrote:
> On 22 Ago, 02:09, "Evan Klitzke" <e... at yelp.com> wrote:
> > On 8/21/07, billiejoex <gne... at gmail.com> wrote:
> >
> >
> >
> > > Hi there,
> > > I'm facing a case where I need to get the traceback outptut when
> > > occurring an exception.
> > > I solved such problem by using traceback module in conjunction with
> > > StringIO:
> >
> > > import StringIO, traceback
> > > try:
> > >     raise Exception
> > > except:
> > >     f = StringIO.StringIO()
> > >     traceback.print_exc(file=f)
> > >     print f.getvalue()
> >
> > > ... but this seems a little poor to me since I first put output into
> > > the StringIO.StringIO(), then I get it back by using getvalue() on
> > > it.
> > > Is there a way to avoid the use of StringIO and get such output
> > > without using such (useless) additional step?
> >
> > If you just want to print the output (as in your example), you can use
> > file=sys.stdout or file=sys.stderr in the call to print_exc. If you
> > want to store the traceback into a string for some other purpose (e.g.
> > logging, email notifications) I believe that you must use a StringIO
> > object.
> >
> > --
> > Evan Klitzke <e... at yelp.com>
>
> Unfortunately I have to pass the output to a function which prints the
> passed string both on screen and into a log file.
> Anyway, not too much important. I'll use StringIO if there's no other
> solution.

Turns out I was wrong -- you can just get the string, using format_exc
rather than print_exc.

-- 
Evan Klitzke <evan at yelp.com>



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