code: def _deprecated_kwargs(kwargs, arg_newarg):
      
      warn_for = []
      for (arg, new_kw) in arg_newarg:
          if arg in kwargs.keys():
              val = kwargs.pop(arg)
              kwargs[new_kw] = val
              warn_for.append((arg, new_kw))
      if len(warn_for) > 0:
          if len(warn_for) == 1:
              warnings.warn("Argument '{}' is deprecated. Use {} instead".
                            format(warn_for[0][0], warn_for[0][1]),
                            DeprecationWarning, stacklevel=4)
          else:
              args = ", ".join([x[0] for x in warn_for])
              repl = ", ".join([x[1] for x in warn_for])
              warnings.warn(
                  "Arguments '{}' are deprecated. Use '{}' instead respectively".
                  format(args, repl),
                  DeprecationWarning, stacklevel=4)
      return kwargs
docs: arg_newarg is a list of tuples, where each tuple has a pair of strings.
          ('old_arg', 'new_arg')
          A DeprecationWarning is raised for the arguments that need to be
          replaced.