python笔记2-错误类型Error Handling

区分Error handling和Debugging

前者指代码放入运行环境后出现的无法预测的错误,如权限问题、数据库改变、服务(server)关闭

后者指代码本身的错误

error types:syntax errors 语法错误、runtime errors(如ZeroDivisionError)、logic errors(单元测试和驱动测试开发可以自动找出逻辑错误,可以看看python里的unit test;堆栈追踪)

runtime error:

比如当服务器关闭、用户输入错误等无法预测的情况出现导致代码无法运行,就可以使用try/except/finally。

x=42
y=0

try:
    print(x/y)
except ZeroDivisionError as e:
    print('not allowed to divid by zero')
else:
    print('something else wrong')
finally:
    print('this is our cleanup code')

输出如下

not allowed to divid by zero
this is our cleanup code

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转载自blog.csdn.net/qq_40431700/article/details/107049749
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