new_contents: def dump_args(func):
      "This decorator dumps out"
      argnames = func.func_code.co_varnames[:func.func_code.co_argcount]
      fname = func.func_name
      def echo_func(*a, **kw):
          print fname, ": "
          return func(*a, **kw)
      return echo_func
  
  @dump_args
  def f1(a, b, c):
      print a + b +c
  
  f1(1, 2, 3)
  
subject: remove dangling link