Am Wed, 12 Sep 2007 15:09:02 +0000 schrieb [EMAIL PROTECTED]:
> On Sep 12, 5:17 am, Peter Otten <[EMAIL PROTECTED]> wrote:
>>
>> Your assessment is wrong. You only get the extra lines in the traceback if
>> you don't immediately wrap the exec statement in a try ... except block:
>> $ cat snip_traceback3.py
>> import sys
>> import traceback
>>
>> def alpha():
>> beta()
>>
>> def beta():
>> gamma()
>>
>> def gamma():
>> try:
>> exec s in {}
>> except Exception, e:
>> etype, value, tb = sys.exc_info()
>> traceback.print_exception(etype, value, tb.tb_next)
>>
>> s = """
>> def delta():
>> epsilon()
>>
>> def epsilon():
>> 1/0
>> delta()
>> """
>>
>> if __name__ == "__main__":
>> alpha()
>>
>> $ python snip_traceback3.py
>> Traceback (most recent call last):
>> File "<string>", line 7, in <module>
>> File "<string>", line 3, in delta
>> File "<string>", line 6, in epsilon
>> ZeroDivisionError: integer division or modulo by zero
>>
>> Heureka.
> Thanks for the help, Peter. That's exactly what I need.
Indeed. But not exactly what you want, it seems.
> Now could I
> use your tb.tb_next trick a couple times and thus avoid moving the try/
> except?
Of course you can cut off the traceback at arbitrary positions. Here's an
example that uses the filename:
import traceback
import sys
def tb_filename(tb):
return tb.tb_frame.f_code.co_filename
def tb_iter(tb):
while tb is not None:
yield tb
tb = tb.tb_next
def alpha():
try:
beta()
except Exception, e:
etype, value, tb = sys.exc_info()
filename = tb_filename(tb)
for tb in tb_iter(tb):
if tb_filename(tb) != filename:
break
traceback.print_exception(etype, value, tb)
def beta():
gamma()
def gamma():
exec s in {}
s = """
def delta():
epsilon()
def epsilon():
1/0
delta()
"""
if __name__ == "__main__":
alpha()
Did I mention it already? It's better to move the try ... except.
Peter
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