In question 6-2, the str function was used, but it hasn't been introduced in the book yet. It's used too early; it should be num['name'], right? --- 6-2那一题中使用了str，书里面还没有讲到呢。用的太早了，应该是num['name']吧。
In question 6-2, the str function was used, but it hasn't been introduced in the book yet. It's used too early; it should be num['name'], right?
6-2那一题中使用了str，书里面还没有讲到呢。用的太早了，应该是num['name']吧。