python实现购物车小程序
#!/usr/bin/python #_*_coding:utf-8_*_prod_info = {
'Apple':10,
'Tesla':700000,
'Mac_Pro':2000,
'Lenovo':4500,
'Chicken':15,
'Women':10000000000
}
# 初始化账号锁定次数为0次
count_lock = 0
while True:
username=input('请输入用户名>>: ')
if username == '':
continue
with open('user_info','r') as f:
user_data = f.readlines()
# print(user_data)
for user in user_data:
user_list = user.strip().split('|')
if username == user_list:
# continue
while True:
passwd = input('请输入密码>>: ').strip()
if passwd == '':
continue
with open('user_info', 'r') as f:
user_data = f.readlines()
for password in user_data:
user_list = password.strip().split('|')
# print(user_list)
if username == user_list and passwd == user_list.strip():
print('用户%s登录成功!' %username)
while True:
# 用户登录成功之后，输入工资
salary_str = input('请输入您的工资 >>: ').strip()
salary = int(salary_str)
if salary == '':
continue
# 打印商品名称和价格列表
prod_list = list(prod_info.items())
# 打印商品名称列表
prod_name_list = list(prod_info.keys())
# 定义一个空的购物列表
shopping_list = []
shop_car = []
while True:
print('Product List'.center(40,'-'))
for prod_name in prod_list:
print(prod_list.index(prod_name) + 1, prod_name)
# for index, item in enumerate(prod_info, 1):
# print(index, item)
choice_id = input('请输入商品名对应的编号，输入q退出程序！>>: ').strip()
# 退出后打印已购商品信息和剩余金额
if choice_id == 'q':
print('购物车清单'.center(37, '-'))
print('已购商品:', shop_car)
print('您当前的余额为:', salary)
print('结束'.center(40,'-'))
exit()
if choice_id.isdigit():
choice_id = int(choice_id)
# 判断输入的商品编号条件
if choice_id > 0 and choice_id <= len(prod_list):
# 通过商品ID，等到商品名称
choice_prod_name = prod_name_list
# print(choice_prod_name)
print('您选择的商品是%s！' % choice_prod_name)
while True:
prod_num = input('请输入购买商品个数，输入q退出程序！>>: ').strip()
total_price = int(prod_info) * int(prod_num)
# 判断是否金额足够购买商品
if total_price <= salary:
# 计算剩余金额
salary -= total_price
# 将已购买商品追加到列表中
shop_car.append((choice_prod_name,int(prod_num)))
print('您已购买商品%s' %choice_prod_name)
print('您当前的余额为:', salary)
else:
# 购买商品余额不足处理
print('您的余额不足')
# 退出打印已购商品清单，并打印余额
if prod_num == 'q':
print('购物车清单'.center(37,'-'))
print('已购商品:',shop_car)
print('您当前的余额为:', salary)
print('结束'.center(40, '-'))
exit()
# 判断输入商品数量是否为纯数字
if prod_num.isdigit():
break
# 打印添加到购物车的商品
shopping_list.append((choice_prod_name, prod_info, int(prod_num)))
print('购物车', shopping_list)
else:
print('您输入的商品编号%s不存在,请重新选择商品！' %choice_id)
else:
count_lock += 1
# 判断用户登陆次数剩余次数
if (3 - count_lock):
print('账号或密码错误，还有 %s 次机会尝试登陆！' % (3 - count_lock))
# 超出尝试登录次数，直接退出程序
# 密码输入三次错误后，锁定账号
if count_lock == 3:
print('您的账号 %s 已被锁定!' % username)
exit()
else:
# 账号不存在，告知
print('用户不存在！')
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