[Python知识库]Python简易购物车（异常处理）

import traceback
goods = [
{‘name’:‘衣服’ ,‘price’:200},
{‘name’:‘猫粮’ ,‘price’:500},
{‘name’:‘衣架’ ,‘price’:20},
{‘name’:‘猫砂’ ,‘price’:50},
{‘name’:‘可乐’ ,‘price’:3},
]

shoping = []
shopingmoney = 0

while True:
try:
money = int(input(‘请输入你的余额:’))
except:
print(‘输入错误，请重试！’)
traceback.print_exc(file=open(‘question.txt’,‘a’))
else:
break

print(‘我们有以下商品：’)
for i in goods:
print(i[‘name’],i[‘price’])

while True:
try:
want = input(‘请输入您想购买的商品： 输入y将进行结算:’)
if want == ‘y’:
break
for i in goods:
if want in i[‘name’]:
shoping.append(i)
break
else:
raise ValueError

except ValueError:
    print('您想购买的产品我们没有哦，请重新输入！')
    traceback.print_exc(file=open('question.txt','a'))

print(‘您购买的商品为：’, shoping)

for i in shoping:
shopingmoney += i[‘price’]

print(‘结算成功您剩余的钱为:’, money - shopingmoney)

仅供参考