goods = {'全脂牛奶':5,
'可口可乐':3,
'乐事薯片':15,
'双肩背包':118,
'小米手环':198,
'华为手机':5998,
'Mac-Pro':8698,
'iphoneX':8998,
}
import os
user_info_list=[]#用户信息
shopping_car=[]#购物车
commodity_count={}#商品数量
# print("编号:{}商品:{}价格:{}".format(format(i,'<2'),format(k,'<10'),format(goods[k],'>5')))
#新建一个空文本文件
with open('用户信息.txt', 'r+', encoding='utf-8') as f:
if len(f.read()) == 0:
f.write('%s \t%s \t%s\n' % ('用户名','密码','金额'))
def modify_money(loginer,balance):
'''
修改用户金额信息
'''
with open('用户信息.txt', 'r', encoding='utf-8') as read_f,\
open('临时文件.txt','w',encoding='utf-8') as write_f:
for line in read_f:
data = line.strip().split(' \t')
if loginer == data[0]:
line = line.replace(data[2],balance)
write_f.write(line)
os.remove('用户信息.txt')
os.rename('临时文件.txt','用户信息.txt')
def user_name_info():
'''
验证用户名是否已被注册
'''
while True: # 验证用户名是否已被注册
user_info = input('请输入用户名：').strip().lower()
with open('用户信息.txt', 'r', encoding='utf-8') as f:
for lines in f:
name = lines.strip().split(' ')
if user_info == name[0]:
print('用户已存在')
break
else:
print('用户名可使用')
return user_info
def user_pwd_info():
'''
验证密码是否一致
'''
while True: # 验证密码是否一致
user_pwd = input('请输入密码：').strip()
user_pwd_again = input('请确认密码：').strip()
if user_pwd == user_pwd_again:
print('注册成功')
return user_pwd
print('密码不一致')
def write_user_info(newuser_name,newuser_pwd):#newuser_name,newuser_pwd 是形参接受实参
'''
将新用户的用户名,密码,初始购物卡金额写入文件
:return:
'''
with open('用户信息.txt', 'a', encoding='utf-8') as f:
f.write('%s \t%s \t%d\n' % (newuser_name,newuser_pwd, 0)) # 将刚注册的用户的名字和初始的购物卡余额（0）写入文件
return
def read_user_info(login_user,login_pwd):
'''
验证用户输入的账户及密码
'''
while True:
if len(user_info_list) > 2:
print('非法操作')
return
with open('用户信息.txt', 'r', encoding='utf-8') as f:
for line in f:
data = line.strip().split(' \t')
if login_user == data[0] and login_pwd == data[1]:
print('登陆成功!')
return login_user,login_pwd
print('用户名或密码错误')
return '错误信息'
def user_money_info(user_balance):
'''
获取用于余额添加到列表
'''
with open('用户信息.txt', 'r', encoding='utf-8') as f:
for line in f:
data = line.strip().split(' \t')
if user_balance == data[0]:
return data[2]
def log_in():
'''
注册
'''
new_name = user_name_info()#检查新用户注册的名字是否可以使用
new_pwd = user_pwd_info()#检查用户注册的密码是否一致
write_user_info(new_name,new_pwd)#将新用户的用户名,密码,初始购物卡金额写入文件
return
def auth():
'''
登陆
'''
count = 0
while True:
if count == 3:
print('错误次数过多...')
exit()
user = input('请输入账户名:').strip().lower()
pwd = input('请输入登陆密码:').strip()
res1 = read_user_info(user,pwd)
if res1 == '错误信息':
count+=1
else:
user_info_list.append(user)#将用户名加入列表
user_info_list.append(pwd)#将用户密码加入列表
res2 = user_money_info(user)#获取用户的余额
user_info_list.append(res2)#将用户余额添加到列表
return res1
def buy():
while True:
if len(user_info_list)==0:
print('请先登陆...')
return
else:
print('用户名:%s 余额:%s '%(user_info_list[0],user_info_list[2]))
print('如果结束购买请输入"q"...')
oof = int(user_info_list[2])#将字符串转成整型
while True:
for k in goods:
print('商品名称:%s 价格:%s'%(k,goods[k]))
commodity_list = list(goods.keys())#将商品添加到列表
choice2 = input('请输入商品名称:').strip()
if oof == 0:
print('你的余额为0,请先充值再进行购买')
return
if choice2 in commodity_list:
# shopping_car.append(choice2)
if choice2 in commodity_count:
commodity_count[choice2]+=1
else:
commodity_count[choice2]=1
print('商品已成功添加到购物车')
elif choice2 == 'q':
while True:
if len(commodity_count) == 0:
return
choice3 = input('请确认是否购买Y/N:').strip().upper()
if choice3 == 'Y':
price = 0
# for i in shopping_car:
for i in commodity_count:
price+=goods[i]
if price >oof:#如果商品的价格大于用户余额
print('你的余额不足,请先充值或购买其他商品')
return
else:
oof = oof-price
print(''.center(50,'-'))
print('%-30s %s'%('商品','价格(元)'))
for i in commodity_count:
print('%-30s %s'%(i,goods[i]))
print(''.center(50,'-'))
print('购买商品成功,马上发货...')
str_oof = str(oof)
modify_money(user_info_list[0],str_oof)
return str_oof
else:
print('抱歉,没有此类商品')
def recharge():
if len(user_info_list) == 0:
print('请先登陆...')
return
else:
pay = int(input('请输入充值金额:').strip())
money = int(user_info_list[2])
money +=pay
user_info_list[2]=str(money)
modify_money(user_info_list[0],str(money))
print('充值成功')
def quit():
print('欢迎下次再来!')
exit()
#主体代码
dic={
'1':log_in,
'2':auth,
'3':buy,
'4':recharge,
'5':quit
}
def register():
while True:
print('''
1.注册
2.登陆
3.购买
4.充值
5.退出
''')
choice1 = input('---->').strip()
if choice1 in dic:
dic[choice1]()
else:
print('非法输入')
register()之前写的购物车有好多BUG....
这次用函数写一下