购物车第一版

#!/usr/bin/env python
# -*- coding:utf-8 -*-  
# by wk
import sys

def mycarlist(mygoodsindex,glist,userinfo):        #购物车列表，同时返回新的商品列表
    newglist = goodssele(mygoodsindex,glist)
    for index, item in enumerate(newglist):
        if mygoodsindex == index:
            # print('my add',newglist[index])
            mycar = newglist[index]
            pmoney = personmoney(userinfo,newglist[index]['price'])
            # print('my add2',mycar)
    return mycar,newglist,pmoney

def goodsdb(glist):                #商品数据库 goodsdatabase
    goodslist = glist
    return goodslist

def goodssele(goodsindex,glists):        #选择好的商品自动减1
    glist = goodsdb(glists)
    for index, item in enumerate(glist):
        # print(index,item)
        if goodsindex == index:
            nu = int(glist[index]['num']) -1
            glist[index].update({'num':nu})
            # print(glist[index])
    return glist


def personmoney(userinfo,goodsmoney):            #个人有多少钱
    if int(userinfo[0]['mymoney']) > int(goodsmoney):
        userinfo[0]['mymoney'] = int(userinfo[0]['mymoney']) - int(goodsmoney)
    else:
        print('not enougth money')
    return userinfo[0]['mymoney']

if __name__ == '__main__':
    # 商品列表
    goodslist = [{'gid': '1', 'gname': 'mobile', 'price': 1000, 'num': 10},
             {'gid': '2', 'gname': 'laptop', 'price': 2000, 'num': 10},
             {'gid': '3', 'gname': 'desktop', 'price': 3000, 'num': 10}]
    mycatlist = []
    userinfo = [{'uname':'wk','mymoney':10000}]
    # goout = 0
    while True:
        glist = goodsdb(goodslist)
        print('id  goods   num')
        for i in glist:
            print(i['gid'], i['gname'], i['num'])
        print('select e to exit')
        mygoodsindex = input('Please select:')
        if mygoodsindex == 'e':          #选择e退出
            print('mycat',mycatlist)
            print('goodslist',goodslist)
            print('usermoney',userinfo)
            break
        else:
            rmygoodsindex = int(mygoodsindex) - 1
            # mylist,newglist = mycarlist(rmygoodsindex)
            mylist,newglist,pmoney = mycarlist(rmygoodsindex,glist,userinfo)
            print('my add',mylist)
            print('my add 2',newglist)
            mycatlist.append(mylist)        #添加到购物车
            goodslist = newglist            #更新商品列表
            userinfo[0]['mymoney'] = pmoney