处理异常except.py

#最简单的处理异常的方式
# try:
#     x = int(input('Enter the first number:'))
#     y = int(input('Enter the second number:'))
#     print(x/y)
# except ZeroDivisionError:
#     print("The second number can't be zero!")
#raise可以传递异常
# class MuffledCalculator:
#     muffled = False
#     def calc(self,expr):
#         try:
#             return eval(expr)
#         except ZeroDivisionError:
#             if self.muffled:
#                 print("Division by zero is illegal")
#             else:
#                 raise

#可以使用多个except来返回错误类型
# try:
#     x = int(input('Enter the first number:'))
#     y = int(input('Enter the second number:'))
#     print(x/y)
# except ZeroDivisionError:
#     print("The second number can't be zero!")
# except TypeError:
#     print("That wasn't a number,was it?")

#可以用一个块捕捉两个异常
# try:
#     x = int(input('Enter the first number:'))
#     y = int(input('Enter the second number:'))
#     print(x/y)
# except (ZeroDivisionError,TypeError,NameError):
#     print("Your number is bugos...")

#打印异常但是程序会继续进行
# try:
#     x = int(input('Enter the first number:'))
#     y = int(input('Enter the second number:'))
#     print(x/y)
# except (ZeroDivisionError,TypeError)as e:
#     print(e)


#实现全捕捉
# try:
#     x = int(input('Enter the first number:'))
#     y = int(input('Enter the second number:'))
#     print(x/y)
# except:
#     print("Some thing is Wrong")

#没有坏事发生时执行一段代码
try:
    x = int(input('Enter the first number:'))
    y = int(input('Enter the second number:'))
    print(x/y)
except ZeroDivisionError:
    print("The second number can't be zero!")
else:
    print("Ah...It went as planned.")
    
while True:
    try:
        x = int(input('Enter the first number:'))
        y = int(input('Enter the second number:'))
        
        value = (x / y)
        print('x/y is ',value)
    except :
        print("Invalid input,please try again.")
    else:
        break