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

I've done the following before:

try:
    doing = "statement1"
    statement1
    doing = "statement2"
    statement2
    doing = "statement3"
    statement3
    doing = "statement4"
    statement4

 except:
    print "exception occurred doing ", doing

The advantage over printing checkpoints is there's no log output unless there actually is an exception.