這裏的購物車的程序 主要用來一些列表、文件、字符串的操作

我構思我的購物車應該具備以下幾個功能

1.能夠新註冊用戶，註冊時檢測用戶名唯一。

2.能夠進行用戶登陸，多次密碼輸入錯誤鎖定用戶。

3.可以瀏覽商品，顯示價格，可將商品進行添加購物車、移除購物車 ，結算等

4.檢測賬戶余額，進行賬戶充值。

流程圖畫在草稿上不小心丟了哈哈，直接上代碼好了，記錄一下自己花了一天的成果。

  1 # -*- coding:utf-8 -*-
  2 
  3 items_list = [
  4     [‘Iphone 6s plus‘, 5800],
  5     [‘Lumia
 
‘, 3800],
  6     [‘Charge‘, 45],
  7     [‘Data line‘, 35],
  8     [‘MI 5 PRO‘, 2299],
  9     [‘MX4‘, 1999],]
 10 salary = 0
 11 total = 0
 12 shop_list = []
 13 while True:
 14     flag = 0
 15     title_1 = ‘歡迎來到英雄商城‘
 16     t_1 = ‘‘.center(58,‘X‘)
 17     t_2 = title_1.center(50,‘-‘)
 18
 
     t_3 = "-"*70
 19     #success print
 20     success_1 = "您已成功註冊賬戶"
 21     s_1 = success_1.center(20,‘-‘)
 22     success_2 =‘歡迎登陸商城‘
 23     s_2= success_2.rjust(20,‘-‘)
 24     #error print
 25     error_1 ="您輸入的賬戶已存在，清重新輸入"
 26     er_1= error_1.center(20,"-")
 27     error_2 ="輸入密碼不一致，重新註冊
 
"
 28     er_2= error_2.center(20,"-")
 29     error_3 = ‘您的賬戶已經被鎖定！重新輸入或者聯系管理員‘
 30     er_3 = error_3.center(20,‘-‘)
 31     error_4 = ‘輸入的賬戶密碼不匹配，您總共有三次嘗試機會‘
 32     er_4= error_4.center(20,‘-‘)
 33     error_5 = ‘賬戶不存在‘
 34     er_5 = error_5.center(20,‘-‘)
 35     print(t_1,‘\n‘,t_2,‘\n‘,t_1)
 36     choice = ‘1.註冊用戶；2.登陸用戶；3.退出程序‘
 37     ch_1 = choice.center(20,‘-‘)
 38     print(ch_1)
 39     st_1 = input(‘輸入您的選擇：‘)
 40     if st_1 == ‘1‘:
 41         while True:
 42             if flag == 1:
 43                 break
 44             with open(‘zhanghumima.txt‘,‘r‘) as f_1:
 45                 list = []
 46                 for line in f_1.readlines():
 47                     tline = line.strip().split(‘:‘)
 48                     list.append(tline[0])
 49             user_add = input("===輸入註冊賬戶名稱：")
 50             if user_add in list:
 51                 print(er_1)
 52                 break
 53             elif user_add == ‘exit‘:
 54                 break
 55             else:
 56                 while flag==0:
 57                     password_1 = input("===請輸入您的密碼：")
 58                     password_2 = input("===請輸入您的密碼again：")
 59                     if password_1 ==password_2:
 60                         with open(‘zhanghumima.txt‘,‘a‘) as f_2:
 61                             w_1 = "%s:%s:0\n" %(user_add,password_1)
 62                             f_2.write(w_1)
 63                             print(s_1)
 64                             flag =1
 65                     else:
 66                         print(er_2)
 67                         break
 68     elif st_1 == ‘2‘:
 69         flag = 0
 70         while True:
 71             if flag ==1:
 72                 break
 73             username = input("請輸入賬戶名稱：")
 74             with open(‘lock.txt‘,‘r‘) as f_3:
 75                 lock_lt = []
 76                 for line in f_3.readlines():
 77                     lock_lt.append(line.strip())
 78                 if username in lock_lt:
 79                     print(er_3)
 80                     break
 81             with open(‘zhanghumima.txt‘,‘r‘) as f_3_4:
 82                 zhanghu_1=[]
 83                 for line in f_3_4:
 84                     zhanghu = []
 85                     zhanghu.append(line.strip().split(‘:‘))
 86                     zhanghu_1.append(zhanghu[0][0])
 87                 if username not in zhanghu_1:
 88                     print(er_5)
 89                     break
 90             with open(‘zhanghumima.txt‘,‘r‘) as f_4:
 91                 for line in f_4.readlines():
 92                     user,password,money=line.strip().split(‘:‘)
 93                     if username==user:
 94                         i=0
 95                         while i < 3:
 96                             password_3 = input(‘請輸入您的密碼：‘)
 97                             i+= 1
 98                             if password_3 ==password:
 99                                 print(s_2,username,‘-‘*20)
100                                 salary = int(money)
101                                 flag = 1
102                                 break
103                             else:
104                                 print(‘密碼不對，您還有%d次機會‘ %(3-i))
105                         while i >=3:
106                             with open(‘lock.txt‘,‘a‘) as a_1:
107                                 a_1.write(username+"\n")
108                                 exit(‘錯誤次數太多，賬戶一輩鎖定，請聯系管理員‘)
109             while True:
110                 with open(‘zhanghumima.txt‘, ‘r‘) as f_4:
111                     for line in f_4.readlines():
112                         user, password, money = line.strip().split(‘:‘)
113                         if username == user:
114                             salary = int(money)
115                 print(t_3)
116                 print("1.購物 2.查看購物車 3.查詢余額 4.充值 b.返回登陸 q.退出")
117                 print(t_3)
118                 choice_2 = input(‘請輸入您的選擇：‘)
119                 flag_1 = 0
120                 while True:
121                     if choice_2=="1":
122                         for index,g in enumerate(items_list):
123                             print(index,g[0],g[1])
124                         print(t_3)
125                         print(‘c.查看購物車 b.返回 q.退出‘)
126                         print(t_3)
127                         choice_3 = input(‘選擇對應的商品‘).strip()
128                         if choice_3.isdigit():
129                             choice = int(choice_3)
130                             price = items_list[choice][1]
131                             if price<=salary:
132                                 shop_list.append(items_list[choice])
133                                 total += price
134                                 salary -= price
135                                 print("您購買了%s，余額為%d" %(items_list[choice][0],salary))
136                             else:
137                                 print(t_3)
138                                 print(‘余額不足‘)
139                                 print(t_3)
140                         elif choice_3 == ‘c‘:
141                             while True:
142                                 print(t_3)
143                                 print(‘這裏是購物車‘)
144                                 print(t_3)
145                                 for k,v in enumerate(shop_list):
146                                     print (k,v[0],v[1])
147                                 print(‘已消費金額為%d‘ %total)
148                                 print(‘剩余金額為%d‘ %salary)
149                                 print(t_3)
150                                 print("d.刪除商品 b.返回購物 q.結算退出")
151                                 print(t_3)
152                                 choice_4 = input(‘輸入您的選項：‘)
153                                 if choice_4 ==‘d‘:
154                                     print(‘輸入的數字為的刪除的對應商品，輸入b返回‘)
155                                     while True:
156                                         choice_5 = input(‘您選擇：‘)
157                                         if choice_5.isdigit():
158                                             choice_5 = int(choice_5)
159                                             shop_list.remove(shop_list[choice_5])
160                                             total -=price
161                                             salary+=price
162                                             print(‘刪除商品成功‘)
163                                         elif choice_5 ==‘b‘:
164                                             break
165                                 elif choice_4==‘b‘:
166                                     break
167                                 elif choice_4==‘q‘:
168                                     print(t_3)
169                                     print(‘購物清單‘)
170                                     print(t_3)
171                                     for k,v in enumerate(shop_list):
172                                         print(‘序號‘, k, ‘\t‘ ‘物品‘, v[0], ‘\t‘ ‘價格‘, v[1])
173                                         print(‘總消費金額為%d‘ %total)
174                                         print(‘消費成功，歡迎下次光臨！！！‘)
175                                         print(t_3)
176                                         exit(0)
177                         elif choice_3 == ‘b‘:
178                             break
179                         elif choice_3 == ‘q‘:
180                             exit(‘歡迎下次光臨‘)
181                         else:
182                             print("您輸入的格式不對，請再考慮考慮")
183                     elif choice_2 ==‘2‘:
184                         print(t_3)
185                         print(‘這裏是購物車‘)
186                         print(t_3)
187                         for k, v in enumerate(shop_list):
188                             print(k, v[0], v[1])
189                         print(‘已消費金額為%d‘ % total)
190                         print(‘剩余金額為%d‘ % salary)
191                         break
192                     elif choice_2 == ‘3‘:
193                         while True:
194                             with open(‘zhanghumima.txt‘, ‘r‘) as f_5:
195                                 for line in f_5.readlines():
196                                     i,j,k =line.strip().split(‘:‘)
197                                     if username==i:
198                                         print(‘親愛的%s，您的賬戶有%s元錢！‘ % (i, k))
199                             break
200                         break
201                     elif choice_2 =="4":
202                         while True:
203                             recharge = int(input(‘請輸入充值金額：‘))
204                             list_1 =[]
205                             with open(‘zhanghumima.txt‘, ‘r‘) as r_3:
206                                 for line in r_3.readlines():
207                                     list_1.append(line.strip().split(":"))
208                                 # print(list_1)
209                                 for item in list_1:
210                                     if item[0] == username:
211                                         new_money = int(item[2])+recharge
212                                         new_money = str(new_money)
213                                         item[2] =new_money
214                                         print(‘充值成功當前余額：‘,item[2])
215                             f=open(‘zhanghumima.txt‘,‘w‘)
216                             f.truncate()
217                             f.close()
218                             with open(‘zhanghumima.txt‘,‘a‘) as w_2:
219                                 for item in list_1:
220                                     wri =‘%s:%s:%s\n‘ %(item[0],item[1],item[2])
221                                     w_2.writelines(wri)
222                                 break
223                             break
224                         break
225 
226                     elif choice_2 == ‘b‘:
227                         break
228                     elif choice_2 == ‘q‘:
229                         print(t_3)
230                         print(‘購物清單‘)
231                         print(t_3)
232                         for k, v in enumerate(shop_list):
233                             print(‘序號‘, k,‘\t‘ ‘物品‘, v[0],‘\t‘ ‘價格‘, v[1])
234                             print(‘總消費金額為%d‘ % total)
235                             print(‘消費成功，歡迎下次光臨！！！‘)
236                             print(t_3)
237                             exit(0)
238 
239 
240 
241 
242     elif st_1 == ‘3‘:
243         exit(‘“感謝使用英雄商城購物系統，歡迎再次使用”‘)
244     else:
245         print(‘輸入類型不對，檢查一下‘)

Python隨筆3 《商城購物車》