处理代码异常

1. 主动抛出异常

1 import sys
2 v = sys.version_info[0]
3 v2 = sys.version_info[1]
4 # print(v)
5 # print(v2)
6 if v ==3 and v2>=5:
7     pass
8 else:
9     raise Exception("Python版本不正确，请使用3.5以上的python版本")

2. 异常处理

 1 import traceback
 2 a = []
 3 d = {}
 4 try:
 5     1 / 0
 6     # a[1]
 7     # d["abc"]
 8 except Exception as e:
 9     # traceback.print_exc() #只是print
10     print(traceback.format_exc()) #错误的那坨字符串
11 # except ZeroDivisionError as e:
12 #     print(e)
13 #     print("出错了")
14 # except IndexError as e:
15 #     print(e)
16 # except KeyError as e:
17 #     print(e)
18 else:
19     print("不出错的情况下走这里")
20 finally:
21     print("什么时候会执行呢？")#任何时候都会执行