code: def deep_merge_dict(base, priority):
      if not isinstance(base, dict) or not isinstance(priority, dict):
          return priority
      result = copy.deepcopy(base)
      for key in priority.keys():
          if key in base:
              result[key] = deep_merge_dict(base[key], priority[key])
          else:
              result[key] = priority[key]
      return result