一,准备
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shopping.txt(在当前目录下),内容如下格式
name price 电脑 4999 鼠标 190 游艇 2000000 美女 998 奔驰 400000 手机 5000 -
购物记录.txt'(当前目录下),初始内容如下:
账户余额:0元
二, 开始写啦~~~
f = open('购物记录.txt', mode='r', encoding='utf-8')
moeny = int(f.readlines()[-1].split(':')[1].strip('元')) # 获取余额
f.close()
print('当前账户余额为:%s元' % moeny)
# 获取商品列表
with open('shopping.txt', mode='r', encoding='utf-8') as f: # 打开文件以获得商品列表
goods = [] # 创建列表用于保存商品与价格信息
lst = f.readline().split() # 获取字典的key
for el in f:
dic = {}
for v in range(len(el.split())):
if el.split()[v].isdecimal():
dic[lst[v]] = int(el.split()[v])
else:
dic[lst[v]] = el.split()[v]
goods.append(dic)
shopping = [] # 购物车
shopping_old = [] # 记录每次购物车
sum_shops = 0 # 记录总消费
# 大循环
while 1:
print('|商 品 列 表:') # 打印商品列表
for index_goods in range(len(goods)): # 打印商品列表
print('|' + str(index_goods + 1), goods[index_goods]['name'], goods[index_goods]['price'])
temp = input('请输入商品序号加入购物车(输入c进行充值,n进行结算,输入q退出):')
# 充值模块
if temp.upper() == 'C':
while 1:
moeny_input = input('请输入充值金额:') # 充值
if moeny_input.isdecimal():
moeny += int(moeny_input) # 充值后的金额
print('充值成功!当前余额为:%s元' % moeny)
break
else:
print('别瞎胡闹,快充钱!!!!!') # #
# 购买模块
elif temp.isdecimal() and 0 < int(temp) <= len(goods):
print(goods[int(temp) - 1]['name'], goods[int(temp) - 1]['price'], '已加入购物车~~')
if len(shopping) == 0: # 第一次添加
dic = {}
dic['name'] = goods[int(temp) - 1]['name']
dic['price'] = goods[int(temp) - 1]['price']
dic['number'] = 1
shopping.append(dic)
else:
for el_shop in range(len(shopping)):
if shopping[el_shop]['name'] == goods[int(temp) - 1]['name']: # 商品在列表中则数量加1
shopping[el_shop]['number'] += 1
elif el_shop == len(shopping) - 1: # 商品不在列表中则新建字典
dic = {}
dic['name'] = goods[int(temp) - 1]['name']
dic['price'] = goods[int(temp) - 1]['price']
dic['number'] = 1
shopping.append(dic)
# 结算模块
elif temp.upper() == 'N':
if len(shopping) == 0: # 提示购物车为空
print('购物车为空!')
else:
while 1:
sum_shop = 0
if len(shopping) == 0: # 如果购物车被清空
print('购物车已被清空!')
break
print('序号 商品 单价 数量')
for ea_shop in range(len(shopping)): # 打印购物车列表,并计算总价
print(ea_shop + 1, ' ' + shopping[ea_shop]['name'], ' ', shopping[ea_shop]['price'], ' ', shopping[ea_shop]['number'])
sum_shop += shopping[ea_shop]['price'] * shopping[ea_shop]['number']
if sum_shop > moeny:
del_shop = input('余额不足,当前差%s元,请输入想要删除的商品序号:' % (sum_shop - moeny))
if del_shop.isdecimal() and 0 < int(del_shop) <= len(shopping):
shopping[int(del_shop) - 1]['number'] = shopping[int(del_shop) - 1]['number'] - 1
if shopping[int(del_shop) - 1]['number'] == 0: # 商品数量为0时从购物车删除
shopping.pop(int(del_shop) - 1)
else:
print('输入错误!')
else:
print('购买成功!在家等着吧!')
moeny -= sum_shop
sum_shops += sum_shop
if len(shopping_old) == 0: # 记录本次购物信息
shopping_old = shopping.copy()
else:
for el in shopping:
for el2 in range(len(shopping_old)):
if el['name'] == shopping_old[el2]['name']:
shopping_old[el2]['number'] = shopping_old[el2]['number'] + el['number']
elif el2 == len(shopping_old) - 1:
shopping_old.append(el)
shopping.clear() # 记录本次购物信息后清空购物车,方便接下来继续购物.
break
# 退出模块
elif temp.upper() == 'Q':
print('本次购物清单:')
for el_shoped in shopping_old: # 打印总购物列表
print(el_shoped['name'] + ' ' + str(el_shoped['number']) + ' ' + str(el_shoped['price']))
print('此次共消费:%s元' % (sum_shops))
print('账户余额:%s元' % (moeny))
with open('购物记录.txt', mode='a', encoding='utf-8') as f: # 写入购物信息
f.write('
商品 数量 单价')
for el_shoped in shopping_old:
f.write('
' + el_shoped['name'] + ' ' + str(el_shoped['number']) + ' ' + str(el_shoped['price']))
f.write('
' + '此次共消费:%s元' % (sum_shops))
f.write('
' + '账户余额:%s元' % (moeny))
print('购物结束,退出程序!')
break
else:
print('输入错误!请重新输入!')