Python实现简易淘宝购物系统完整代码解析

核心代码实现与逻辑解析

#刚创建账户所拥有的钱
money = 0


#定义商品列表
goods_list = [
{'name':'iphone','price':4500,'count':40},
{'name':'电脑','price':7000,'count':100},
{'name':'平板','price':5000,'count':60},
{'name':'羽绒服','price':500,'count':80},
{'name':'西服','price':1000,'count':90},
{'name':'运动鞋','price':200,'count':120},
{'name':'vivo','price':2000,'count':200},
{'name':'自行车','price':2100,'count':300}]

#创建空的购物车
shoppingCar = []

#创建订单列表
order = []

#注册账户
def register():
 print('→'*8,'注册账号','←'*8)
 global account
 global password
 account = input('请输入账号')
 password = input('请输入密码')
 password1 = input('请确认密码')
 while True:
 if password == password1:
 print('→'*8,'注册成功','←'*8)
 log_in()
 break
 else:
 password = input('请重新输入密码')
 password1 = input('请确认密码')


#登录
def log_in():
 print('~'*10,'登录账号','~'*10)
 while True:
 user_account = input('请输入您的账号')
 user_password = input('请输入您的密码')
 if user_account != account:
 print('账号有误')
 elif user_account == account and user_password != password:
 print('密码有误')
 else:
 print('~'*10,'登录成功','~'*10)
 show_menu()
 break

#展示商品列表
def show_name():
 print('❤'*30)
 a = 0
 for i in range(0,len(goods_list)):
 for key in goods_list[i].keys():
 if key == 'name':
 a += 1
 print(goods_list[i][key], end = '\t')
 if a % 4 ==0 :
 print('')
 print('❤'*30)


#选择操作
def show_menu():
 while True:
 print('※'*20)
 print('请选择您要执行的操作：')
 print('1、查询商品')
 print('2、查看购物车')
 print('3、查看订单')
 print('4、其他功能')
 print('5、退出系统')
 print('※'*20)
 choice = int(input())
 if choice == 1:
 show_name()
 search_shopping()
 elif choice == 2:
 show_shoppingCar()
 elif choice == 3:
 show_order()
 elif choice == 4:
 other()
 else:
 print('欢迎下次光临！')
 break

#添加商品至购物车
def add_shopping(name,price,count,total):
 dict = {}
 dict['name'] = name
 dict['price'] = price
 dict['count'] = count
 dict['total'] = total
 shoppingCar.append(dict)


#展示购物车
def show_shoppingCar():
 global money
 NeedMoney = 0
 for i in range(0,len(shoppingCar)):
 for key in shoppingCar[i].keys():
 print('*'*30)
 if key == 'name':
 print('商品名称:'+shoppingCar[i][key])
 elif key == 'price':
 print('商品单价:%d'%shoppingCar[i][key])
 elif key == 'count':
 print('商品数量:%d'%shoppingCar[i][key])
 elif key == 'total':
 print('商品总价:%d'%shoppingCar[i][key])
 NeedMoney += shoppingCar[i][key]
 print('一共需花费%d元'%NeedMoney)
 if money >= NeedMoney:
 money -= NeedMoney
 pay_shopping()
 print('一共花费%d元'%NeedMoney)
 else:
 print('余额不足')
 charge_money()

#清空购物车
def pay_shopping():
 print('是否支付 yes / no')
 user = input('')
 if user == 'yes':
 print('支付成功')
 order.extend(shoppingCar)
 shoppingCar.clear( )



#设置充值密码
def charge_pwd():
 global charge_password
 global money
 print('❀'*30)
 charge_password2 = input('请输入密码')
 charge_password1 = input('请确认密码')
 while True:
 if charge_password1 == charge_password2:
 charge_password = charge_password1
 print('❀'*10,'设置成功','❀'*10)
 show_menu()
 break


#充值金额
def charge_money():
 global money
 print('是否充值 yes / no')
 user = input('')
 if user == 'yes':
 while True:
 user = input('请输入密码')
 if user == charge_password:
 while True:
  chargeMoney = int(input('请输入充值金额'))
  if chargeMoney % 100 != 0:
  print('请输入充值金额')
  else:
  money += chargeMoney
  print('充值成功')
  break
 break
 else:
 print('密码有误')



#添加至订单

def add_order(name,price,count,total):
 dict = {}
 dict['name'] = name
 dict['price'] = price
 dict['count'] = count
 dict['total'] = total
 order.append(dict)



#展示订单
def show_order():
 cost_money = 0
 #总共花费的钱
 for i in range(0,len(order)):
 for key in order[i].keys():
 print('*'*50)
 if key == 'name':
 print('商品名称:'+order[i][key])
 elif key == 'price':
 print('商品单价:%d'%order[i][key])
 elif key == 'count':
 print('商品数量:%d'%order[i][key])
 elif key == 'total':
 print('商品总价:%d'%order[i][key])
 cost_money += order[i][key]
 print('总共花费%d元'%cost_money)


#查找商品
def search_shopping():
 name = input('请输入您要查询的名称：')
 isExist = False
 for i in range(0,len(goods_list)):
 if isExist:
 isExist = False
 break
 dict = goods_list[i]
 if dict['name'] == name:
 print('商品名称：'+name)
 print('商品单价：%d'%dict['price'])
 print('商品库存：%d'%dict['count'])
 if dict['count'] != 0 : 
 print('请选择一下功能：\n1、购买\n2、添加至购物车\n3、返回上一项')
 choice = int(input())
 if choice == 1:
  buy_shopping(dict)
  isExist = True
 elif choice == 3:
  search_shopping()
 elif choice == 2:
  num = int(input('请选择添加至购物车的数量：'))
  while True:
  if num > dict['count']:
  print('超出总量限制，请重新输入！')
  num = int(input('请选择添加至购物车的数量：'))
  else:
  add_shopping(dict['name'],dict['price'],num,dict['price']*num)
  isExist = True
  print('添加成功')
  break
 else:
  print('输入有误，再见！')
 else:
 if i == len(goods_list)-1:
 print('该商品不存在，请重新选择功能！')


#购买商品
def buy_shopping(dict):
 global money
 if dict['count'] == 0:
 print('该商品已售空，请选择其他商品')
 else:
 while True:
 num = int(input('请输入购买的数量：'))
 if num <= dict['count']:
 needMoney = num * dict['price']
 if money < needMoney:
  print('余额不足，请充值或修改购买数量！')
 else:
  money -= needMoney
  dict['count'] -= num
  print('购买成功！')
  add_order(dict['name'],dict['price'],num,dict['price']*num)
 break
 else:
 print('库存不足，请重新输入')


#其他功能
def other():
 print('△'*30)
 print('请选择您要执行的操作：')
 print('1、充值')
 print('2、更改登录密码')
 print('3、更改充值密码')
 print('4、查看余额')
 choice = int(input())
 if choice == 1:
 print('是否选择设置充值密码　yes/ no')
 a = input()
 if a == 'yes' :
 charge_pwd()
 else:
 charge_money()
 elif choice == 2:
 change_password()
 elif choice == 3:
 changeCPWD()
 elif choice == 4:
 print('余额为%d元'%money)

#更改登录密码
def change_password():
 global password
 while True:
 print('☆'*30)
 a = input('输入新密码')
 b = input('确认密码')
 print('☆'*30)
 if a == b:
 password = a
 print('请重新登录')
 log_in()
 break
 else:
 print('重新输入')


#更改支付密码
def changeCPWD():
 global charge_password
 while True:
 print('◇'*30)
 a = input('输入新密码')
 b = input('确认密码')
 print('◇'*30)
 if a == b:
 charge_password = a
 break
 else:
 print('重新输入')

register()