python中使用traceback来追

#!/usr/bin/python
import sys
def division(a=1, b=1):
    if b==0:
         print 'b eq 0'
         sys.exit(1)
    else:
         return a/b

#!/usr/bin/python
import sys
import traceback
import test1 
 
a=10
b=0
 
try:
    print test1.division(a,b)
except:
    print 'invoking division failed.'
    traceback.print_exc()
    sys.exit(1)

$python test2.py
 execution python-2.5.1/python (enodeb/linux)
 b eq 0
 invoking division failed.
 Traceback (most recent call last):
   File "test2.py", line 10, in <module>
     test1.division(a,b)
   File "/home/fesu/test1.py", line 6, in division
     sys.exit(1)
 SystemExit: 1