def trace(frame, event, arg):
  print '<trace>', event, 'in', frame.f_code.co_name, '@', frame.f_lineno
  return trace
import sys
sys.settrace(trace)

def foo():
  try:
    return foobar
  finally:
    pass
  
def bar():
  return foo()

try:
  bar()
except:
  pass