getting tracebacks from traceback objects

[Michael P. Soulier]

Hello,

For a GUI app I've tried resetting sys.excepthook to my own
exceptionhandler bound method, which accepts a type, value and traceback
object.

Now, the traceback module has print_exc and format_exc methods that are
supposed to take a traceback object and return a formatted traceback
like the default output. Unfortunately I keep getting 'None' out of
them. Not sure why.

Happens here too.

def handler(type, value, tb): ... traceback.print_exc(tb)
... import traceback
import sys
sys.excepthook = handler
assert(False)

None

Pretty sure this worked in 1.5.2. Am I doing something wrong here?

I want format_exe especially, since I don't want to print to stdout, I
want to provide the traceback in a popup dialog.

Thanks,
Mike

--
Michael P. Soulier <ms******@digitaltorque.ca>
http://www.digitaltorque.ca
http://opag.ca python -c 'import this'
Jabber: ms******@digitaltorque.ca

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[Kent Johnson]

Michael P. Soulier wrote:

Hello,

For a GUI app I've tried resetting sys.excepthook to my own
exceptionhandler bound method, which accepts a type, value and traceback
object.

Now, the traceback module has print_exc and format_exc methods that are
supposed to take a traceback object and return a formatted traceback
like the default output. Unfortunately I keep getting 'None' out of
them. Not sure why.
You are misreading the docs. print_exc() and format_exc() take args of [limit[, file]] not a traceback.
I want format_exe especially, since I don't want to print to stdout, I
want to provide the traceback in a popup dialog.

Use format_exception() or pass a StringIO object as the file parameter to print_exc().

Kent