docs: def get_topic_set(file_path):
      """
      Opens one of the topic set resource files and returns a set of topics.
  
      - Input:  - file_path: The path pointing to the topic set resource file.
  
      - Output: - topic_set: A python set of strings.
      """
      topic_set = set()
      file_row_gen = get_file_row_generator(file_path, ",")  # The separator here is irrelevant.
      for file_row in file_row_gen:
          topic_set.add(file_row[0])
  
      return topic_set