Python购物车程序

Posted 2020-11-17 moshell

#!/usr/bin/env python 

#_*_ coding:utf-8 _*_
#Author:LiuJindong 
#datetime:2018/6/11 16:34

‘‘‘
此程序为购物车程序,包括用户入口、商家入口.
用户入口:已购商品、余额记录.
商家入口:可以添加商品、修改商品价格.
‘‘‘

import time,sys

def Business_entrance(ProductList):
    f1=open(ProductList,‘r‘)
    Product={}
    for line in f1:
        line=line.strip()
        if len(line)>0:
            k,v=line.split()
            Product[k]=v
    f1.close()
    print(‘33[33;1m商品   价格33[0m‘.center(50,‘*‘))
    for k,v in Product.items():
        print(‘33[32;1m%s %s33[0m‘%(k,v))
    Flag=True
    while Flag:
        User_Choice=input(‘请选择添加商品(A|a)|修改商品价格(C|c)|退出程序(Q|q):‘).strip()
        if User_Choice==‘A‘ or User_Choice==‘a‘:
            while True:
                with open(ProductList,‘a‘) as f2:
                    Pro_Name1=input(‘请填写需要添加的商品名称:‘).strip()
                    if Pro_Name1 not in Product.keys():
                        Pro_Price1 = input(‘请填写商品价格:‘).strip()
                        Res=Pro_Name1+‘ ‘+Pro_Price1+‘
‘
                        f2.write(Res)
                        print(‘%s,已添加到商品列表中‘%Pro_Name1)
                        break
                    else:
                        print(‘商品已存在,请重新输入.‘)
        elif User_Choice==‘C‘ or User_Choice==‘c‘:
            while True:
                Pro_Name2 = input(‘请填写修改的商品名称:‘).strip()
                if Pro_Name2 in Product.keys():
                    Pro_Price2=input(‘请填写修改后的商品价格:‘).strip()
                    with open(ProductList, ‘r‘) as f3:
                            for line in f3:
                                line=line.strip().split()
                                if Pro_Name2 in line:
                                    Product[Pro_Name2] = Pro_Price2
                                    print(‘%s价格修改成功‘ % Pro_Name2)
                                f4=open(ProductList,‘w‘)
                                for k, v in Product.items():
                                    Res=k+‘ ‘+v+‘
‘
                                    f4.write(Res)
                            else:
                                print(‘准备返回上一级菜单‘)
                                time.sleep(2)
                                break
                else:
                    print(‘您填写的商品不存在,请重新填写.‘)
                    continue

        elif User_Choice==‘Q‘ or User_Choice==‘q‘:
            print(‘准备退出程序‘)
            time.sleep(2)
            Flag=False
        else:
            print(‘您输入有误,请重新输入.‘)
            continue
    return ‘商家入口程序已成功运行‘


def Person_entrance(Productlist,Shopping_Cart,Balance_Record):
    Product={}
    with open(Productlist,‘r‘) as f1:
        for line in f1:
            line=line.strip()
            if len(line)>0:
                k,v=line.split()
                Product[k]=v
    print(‘33[33;1m商品名称  价格33[0m‘.center(50,‘*‘))
    for k,v in Product.items():
        print(‘33[34;1m%s %s33[0m‘%(k,v))
    Flag=True
    while Flag:
        Salary=input(‘请输入您的工资:‘).strip()
        if Salary.isdigit():
            Salary=int(Salary)
            while True:
                Pro_Name=input(‘输入购买商品名称|退出程序(Q|q):‘).strip()
                if Pro_Name in Product.keys():
                    f2=open(Shopping_Cart,‘a‘)
                    f3=open(Balance_Record,‘w‘)
                    if Salary>=int(Product[Pro_Name]):
                        print(‘%s,购买成功.‘%Pro_Name)
                        Salary-=int(Product[Pro_Name])
                        print(‘您的余额为:%d‘%Salary)
                        Shopping_list=Pro_Name+‘ ‘+Product[Pro_Name]+‘
‘
                        f2.write(Shopping_list)
                        f3.write(str(Salary))
                    elif Salary<=0:
                        print(‘您的余额不足,欢迎下次再次光临.‘)
                        f3.write(str(Salary))
                        time.sleep(2)
                        sys.exit()
                    else:
                        print(‘您的余额不足以购买此商品,请重新选择.‘)
                        continue
                elif Pro_Name==‘Q‘ or Pro_Name==‘q‘:
                    print(‘准备退出程序‘)
                    time.sleep(2)
                    sys.exit()
                else:
                    print(‘您输入的商品名称不存在,请重新输入.‘)
                    continue
        else:
            print(‘您输入的工资格式有误,请重新输入.‘)
            continue







if __name__==‘__main__‘:
    Business_entrance(‘Product_list‘)
    Person_entrance(‘Product_list‘,‘Shopping_Cart.txt‘,‘Balance_Record.txt‘)