python 进阶 异常处理

inp = input("请输入数字：")
try:
    num = int(inp)
    print(num)
except Exception as e:
    print("你输入的不是数字")
# -------------------------------------------------------------
li = []
try:
    li = []
    li[999]

# 捕捉多个异常，并进行处理
except IndexError as e:
     print("索引错误")
except ValueError as e:
    print("值错误")
except Exception as e:
    print(e)

try:
    print("123")
    raise Exception("出错了。。。")
except Exception as e:
    # 封装错误信息的对象
    print(e)

class MyException(Exception):

     def __init__(self, msg):
          self.message = msg

     def __str__(self):
          return self.message
     
 try:
     raise MyException("我的异常")
 except MyException as e:
 print(e)