python 异常处理：

简单的异常处理主要依靠内置异常处理结构体，代码结构如下：
try:
…
except ValueError as e: # 异常判断，出现ValueError错误时处理机制
…
except ZeroDivisionError as e: # 异常判断，出现ZeroDivisionError错误时处理机制
…
finally:
…

示例：

# coding = utf-8


class Test:
    def __init__(self, num):
        self.num = num

    def unnormal(self):
        try:
            print('开始测试异常情况')
            r = 10 / self.num
            print('result：', r)
        except TypeError as e:
            print('TypeError：', e)
        except ZeroDivisionError as e:
            print(e)
        finally:
            print('finish')


op_test1 = Test(num=2)
op_test1.unnormal()

op_test2 = Test(num='test')
op_test2.unnormal()

op_test3 = Test(num=0)
op_test3.unnormal()

示例运行结果：