code: def print_exc(limit=None, file=None):
      
      if file is None:
          # TODO: Use sys.stderr when that's implemented.
          file = open('/dev/stderr', 'w')
          #file = sys.stderr
      try:
          etype, value, tb = sys.exc_info()
          print_exception(etype, value, tb, limit, file)
      finally:
          etype = value = tb = None
docs: Shorthand for 'print_exception(sys.exc_type, sys.exc_value, sys.exc_traceback, limit, file)'.
      (In fact, it uses sys.exc_info() to retrieve the same information
      in a thread-safe way.)