Extracting the traceback

Evan Klitzke evan at yelp.com
Wed Aug 22 02:09:15 CEST 2007

On 8/21/07, billiejoex <gnewsg 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

Evan Klitzke <evan at yelp.com>

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