如何在Python中整理YAML文件的Ticker-特征类别映射结构

没问题，我帮你把这份Ticker与特征类别的映射整理成结构更清晰的YAML格式了，这样每个Ticker对应的特征类别一目了然：

index:
  - BANKNIFTY_O_C_0_09_W: [books, trends, trades, relations]
  - BANKNIFTY_O_P_0_09_W: [books, trends, trades, negrelations]
  - BANKNIFTY_O_C_0_10_W: [books, trends, trades, relations, options_banknifty_weekly]
  - BANKNIFTY_O_P_0_10_W: [books, trends, trades, negrelations]
  - BANKNIFTY_F_0: [books, trends, trades, relations]
  - NIFTY_F_0: [books, trends, trades, relations]

内容的提问来源于stack exchange，提问作者Venugopal Bukkala