经典的python练习题，对于深入掌握py有重要的意义，本文章也有助于新人学习py更快，总之多练多刷题是没有错的，希望有所帮助(The classical Python exercises are of great significance to the in-depth mastery of py. This article also helps the newcomers to learn py faster. In a word, there is no mistake in practicing multiple brushing exercises. I hope it will be helpful.)