人人都懂的编程课（Python)
Rewrite your pay program using try and except so that your program handles non-numeric input gracefully. Enter Hours: 20 Enter Rate: nine Error, please enter numeric input
密歇根大学 - 人人都懂的编程课（Python）
原文：http://www.cnblogs.com/yangke687/p/4298071.html
