code: def register_arguments(func, args=None):
      
      if args is None:
          args = func.args.args
          if func.args.vararg:
              func.set_local(func.args.vararg, func.args)
          if func.args.kwarg:
              func.set_local(func.args.kwarg, func.args)
      for arg in args:
          if isinstance(arg, nodes.Name):
              func.set_local(arg.name, arg)
          else:
              register_arguments(func, arg.elts)
docs: add given arguments to local
  
      args is a list that may contains nested lists
      (i.e. def func(a, (b, c, d)): ...)