Is there a way of better tracback reporting??

[ed_tsang at yahoo.com]

hi I currentyl have the foloowing situation:

I am trying to execute a python function in file inc.py, from try.py. 
I also want this function execution can be turned on or off at 
try.py, without commenting any code or changing any code other than 
the ENABLE_ME flag.

So I include a file pix.py that has a varable ENABLE_ME, which can be 
enabled or diabled, from file pix.py. 

Since the attached code is the simplified version, the opeation is 
not continuous and can't show the user to enable or diable some 
function execution at run time. 

My problem is I want to print the traceback information just in case 
something like: the function to be executed cannot be found in 
inc.py. Although I am able to print some info, it does not specify me 
the error is in inc.py instead it say from try.py during exec(cmd). 

This may mislead user that the try.py is the one in question. How can 
I point out the error is actually from inc.py??? 

Thanks
Here is the attached code:

file inc.py:

def a():
    print "A is executed\n"
def b():
    print "B is executed\n"

file pix.py:

from inc import *

ENABLE_ME = 1

file try.py:

try:
   import traceback, sys
   exec('import pix')
   exec('reload(pix)')
  
   if hasattr(pix,'ENABLE_ME') > 0:
     
      if pix.ENABLE_ME == 1:
         cmd = '%s.%s'%('pix','a()')
         exec(cmd)
         print "hihiht"
         cmd = '%s.%s'%('pix','b()')
         exec(cmd)
         cmd = '%s.%s'%('pix','c()')
         exec(cmd)
except SyntaxError:
   exc = sys.exc_info()
   traceback.print_exception(exc[0],exc[1],exc[2])
   #traceback.print_exc()
   

Results:
A is executed

B is executed

Traceback (innermost last):
  File "try.py", line 15, in ?
    exec(cmd)
  File "<string>", line 1, in ?
AttributeError: c

See the error is saying in exec(cmd) in try.py but the real problem 
is there is no c function in inc.py ....  :(  
I want to generalise this to include any type of error hapeend when 
executing functions in inc.py.