Locating the line number where an exception occurs in python code

Question

I have a code similar to this:

try:
  if x:
      statement1
      statement2
      statement3
  elif y:
      statement4
      statement5
      statement6
          


        

Answer 1

what about this:

try:
  if x:
      print 'before statement 1'
      statement1
      print 'before statement 2' #ecc. ecc.
      statement2
      statement3
  elif y:
      statement4
      statement5
      statement6
  else:
      raise

except:
      statement7

this is the straightforward workaround but I suggest to use a debugger

or even better, use the sys module :D

try:
      if x:
          print 'before statement 1'
          statement1
          print 'before statement 2' #ecc. ecc.
          statement2
          statement3
      elif y:
          statement4
          statement5
          statement6
      else:
          raise
except:
    print sys.exc_traceback.tb_lineno 
    #this is the line number, but there are also other infos