python實例_購物車
阿新 • • 發佈：2017-07-11
pan == for spa get exit else 高亮 sdi
一，作者介紹
吳海東：My Blog:http://www.cnblogs.com/whd-672701
二，程序說明
購物車程序：
1、啟動程序後，輸入用戶名密碼後，如果是第一次登錄，讓用戶輸入工資，然後打印商品列表
2、允許用戶根據商品編號購買商品
3、用戶選擇商品後，檢測余額是否夠，夠就直接扣款，不夠就提醒
4、可隨時退出，退出時，打印已購買商品和余額
5、在用戶使用過程中， 關鍵輸出，如余額，商品已加入購物車等消息，需高亮顯示
6、用戶下一次登錄後，輸入用戶名密碼，直接回到上次的狀態，即上次消費的余額什麽的還是那些，再次登錄可繼續購買
7、允許查詢之前的消費記錄
三，程序前準備
創建一個購物物品文件“shopping”，物品可自行定義。
創建一個存放已購買物品的文件“lock_file”，開始默認為空。
四，程序腳本
shangpin = open("shopping",‘r‘,encoding="utf-8") shangpin = list(shangpin) shopping_list = [] def test(): for index, i in enumerate(shangpin): print(index, i) mai = input("Want to buy what?>>>:") return mai def test_1(): jin= input("Please enter the amount:") if jin.isdigit(): jin = int(jin) loginSucces = False while True: mai = test() if mai.isdigit(): mai = int(mai) if mai < len(shangpin) and mai >= 0: kemai= shangpin[mai] kemai = kemai.strip().split(‘,‘) kemaii = int(kemai[1]) if kemaii <= jin: shopping_list.append(kemai) jin -= kemaii print("\033[32;1mBuy the goods:%s,The balance remaining:%s\033[0m" % (kemai, jin)) loginSucces = False while True: jixu = input("繼續購買按y，或是退出按q:") if jixu.isalpha(): jixu = str(jixu) if jixu == ‘y‘: break if loginSucces == True:continue elif jixu == ‘q‘: print("\033[31;1m-----You bought the following goods altogether----") for p in shopping_list: print(p) f = open("lock_file", ‘a+‘, encoding="utf-8") f.write("{\"%s\":{\"name\":\"%s\",\"shopping\":%s,\"remaining\":%s}}\n" % (str(username), str(username), str(shopping_list), str(jin))) f.close() if loginSucces == True: break print("The balance remaining:%s\033[0m" % jin) exit() if loginSucces == True: break continue else: print("Insufficient balance to buy:%s" % jin) loginSucces = False while True: jixu = input("繼續購買按y，或是退出按qq:") if jixu.isalpha(): jixu = str(jixu) if jixu == ‘y‘: break elif jixu == ‘q‘: print("\033[31;1m-----You bought the following goods altogether----") for p in shopping_list: print(p) f = open("lock_file", ‘a+‘, encoding="utf-8") f.write("{\"%s\":{\"name\":\"%s\",\"shopping\":%s,\"remaining\":%s}}\n" % ( str(username), str(username), str(shopping_list), str(jin))) f.close() print("The balance remaining:%s\033[0m" % jin) exit() if loginSucces == True:break def test_2(): for date in dataa: if username in date: print(dataa[username]) else: continue jin = dataa[username]["remaining"] jine = jin jin = str(jin) if jin.isdigit(): jin = int(jin) loginSucces = False while True: mai = test() if mai.isdigit(): mai = int(mai) if mai < len(shangpin) and mai >= 0: kemai = shangpin[mai] kemai = kemai.strip().split(‘,‘) kemaii = int(kemai[1]) if kemaii <= jin: aa = dataa[username]["shangpin"] aaa = aa aaa = str(aaa) shopping_list = dataa[username]["shangpin"] shopping_list.append(kemai) print(shopping_list) shopping_li = shopping_list shopping_li = str(shopping_li) jin -= kemaii jin = str(jin) jine = str(jine) print("\033[32;1mBuy the goods:%s,The balance remaining:%s\033[0m" % (kemai, jin)) loginSucces = False while True: jixu = input("繼續購買按y，或是退出按q:") if jixu.isalpha(): jixu = str(jixu) if jixu == ‘y‘: break if loginSucces == True: continue elif jixu == ‘q‘: print("\033[31;1m-----You bought the following goods altogether----") for p in shopping_list: print(p) with open("lock_file","r",encoding="utf-8") as f: lines = f.readlines() with open("lock_file","w",encoding="utf-8") as f_w: for line in lines: if username in line: line = line.replace(aaa,shopping_li) f_w.write(line) f_w.close() with open("lock_file", "r", encoding="utf-8") as f: lines = f.readlines() with open("lock_file", "w", encoding="utf-8") as f_q: for line in lines: if username in line: line = line.replace(jine,jin) f_q.write(line) f_q.close() print("The balance remaining:%s\033[0m" % jin) exit() if loginSucces == True: break username = input(‘xinuser:‘).strip() with open("lock_file",‘r‘,encoding="utf-8") as f: for data in f: if len(data) != 0: dataa = eval(data) for date in dataa: daa = date if username in daa: break elif username not in daa: continue test_2() else: password = input(‘passwd:‘).strip() test_1()
python實例_購物車