code: def merge_dictionaries(base_dict, extra_dict):
      
      new_dict = base_dict.copy()
      new_dict.update(extra_dict)
      return new_dict
docs: merge two dictionaries.
  
      if both have a same key, the one from extra_dict is taken
  
      :param base_dict: first dictionary
      :type base_dict: dict
      :param extra_dict: second dictionary
      :type extra_dict: dict
      :return: a merge of the two dictionaries
      :rtype: dicts