「Python编程规范」Python中的异常.docx

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1、功能要求演示Python中出现的运行时错误。实例代码pr i nt (He I Io, and we I come to Python!)pr i nt(I hope you wi I I enjoy I earn i ng to program.)pr i nt (Bye for now! + 5)运行结果Hello, and welcome to Python!I hope you will enjoy learning to program.Traceback (most recent call last):File :/PythonCode/hello. Line 3, in prin

2、t(HBye for now!H + 5)TypeError: can only concatenate str (notto strProcess finished with exit code 1代码分析在Python中，不能把两个完全不同的东西加在一起。字符串和数字不能相加，这些东西 加在一起没有任何意义。几乎所有的东西都可以乘以一个数字来翻倍。知识说明运行程序之前Python (或IDLE)无法检测出来的多为，这种错误在程序运行时才会发生, 所以被称为运行时错误(runtime error) 区分异常和错误的方法就需要去观察终端的提示信息，一般情况下，异常的“错误消息” 会显示Trac

3、eback (most recent cal I last),而语法错误就不会显示。较为常见的类型错误: 不支持的运算；只能用字符串拼接字符串；对象不可被迭代；索引超出了范围等。修改代码pr i nt (He I Io, and we I come to Python!)pr i nt(I hope you wi I I enjoy I earn i ng to program.)pr i nt (Bye for now! * 5)运行结果Hello, and welcome to Python!I hope you will enjoy learning to program.Bye for now!Bye for now!Bye for now!Bye for now!Bye for now!Process finished with exit code 0