捕捉异常（3）

while True:    try:        x=input('Enter the first number:')        y=input('Enter the second number:')        value=x/y        print 'x/y is ',value    except:        print "Invalid input.Please try again."    else:        break

Enter the first number:1
Enter the second number:0
Invalid input.Please try again.
Enter the first number:
Invalid input.Please try again.
Enter the first number:'foo'
Enter the second number:'bar'
Invalid input.Please try again.
Enter the first number:baz
Invalid input.Please try again.
Enter the first number:10
Enter the second number:2
x/y is  5