Question

因此，我尝试使用Exception as e:，但是变量e不会显示我先前分配给它的消息。你能帮我吗？

SERVICE_CHARGE= 2
TICKET_PRICE = 10
tickets_remaining= 100

def calculate_price(number_of_tickets):
    return (number_of_tickets * TICKET_PRICE) + SERVICE_CHARGE

while tickets_remaining:
    print "There are {} tickets remaining".format(tickets_remaining)

users_name=raw_input("What's your name?  ")

try:
    number_of_tickets=int(input("{}, how many tickets would you like to buy?  ".format(users_name)))
    if number_of_tickets>tickets_remaining:
        raise Exception("Not enough tickets remaining")       
except Exception as err:
    print "Im sorry. {}. Please try again!".format(err)

Answer 1

这是因为当您将Exception编写为e时，e成为Exception中存储的值的别名，即e临时存储Exception的值，然后丢弃它（成为未定义）。您应该使用（您在问题中提到了变量e，但在代码中使用了err）：

except Exception:
    print "Im sorry. {}. Please try again!".format(err)

异常不显示先前引发的异常具有的消息

1 个答案: