使用

try:
    num = int(input("输入一个整数："))
    result = 8 / num
except ZeroDivisionError:
    print("除0错误")
except Exception as e:
    print("未知错误 %s" % e)
else:
    print("没有异常才会执行")
finally:
    print("无论是否异常都会执行")
print("---")

主动抛异常

try:
    print("主动抛出异常")
    raise Exception("异常")  # 关键字raise 抛异常
except Exception as e:
    print(e)
print("---")