JAVA高级面试进阶训练营视频教程

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 1 """
 2     自定义异常
 3 """
 4 class MyException(Exception): # 继承异常类
 5     def __init__(self, name, reason):
 6         self.name = name
 7         self.reason = reason
 8     
 9 from datetime import datetime
10 try:
11     if str(datetime.now()) > "2018":
12         raise MyException("TimeoutException", "time is overtime...")
13 except MyException as e:
14     print(e.name +":"+e.reason)
15     
16 """
17     抛出异常
18 """        
19 try:
20     6/0
21     raise
22 except Exception as e:
23     print(e)

 8 try:
 9     print("--------------") 10 except NameError as e: # 捕获NameError类型异常 11 print(e) 12 except Exception as e: # 捕获其它异常 13 print(e) 14 else: 15 print("没有异常会接着往下执行。。。") 16 finally: 17 print("最后一定执行。。。") 18 19 # 测试捕获某种或某些种except 20 try: 21 print(aaa) 22 print("--------------") # 出现异常后不会执行下面的程序 23 except NameError as e: # 捕获NameError类型异常 24 print(e) 25 except Exception as e: # 捕获其它异常 26 print(e) 27 else: 28 print("没有异常会接着往下执行。。。") 29 finally: 30 print("最后一定执行。。。") 31 32 # 测试捕获其它异常 33 try: 34 open("a.txt") 35 print("--------------") 36 except NameError as e: # 捕获NameError类型异常 37 print(e) 38 except Exception as e: # 捕获其它异常 39 print(e) 40 else: 41 print("没有异常会接着往下执行。。。") 42 finally: 43 print("最后一定执行。。。") 44 45 # 测试异常传递 46 def err(): 47 print(aaa) 48 49 try: 50 print("===============") 51  err() 52 except NameError as e: # 捕获NameError类型异常 53 print(e) 54 55 print("use try will make your code beauty")

结果：