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#python 3.5环境，解释器在linux需要改变
#商城购物，阅读手册查询readme文件
#调用文件 login.txt,lock.txt
#作者：S12-陈金彭
Auth_File="login.txt" #认证登陆文件
Lock_File="lock.txt" #锁定文件
F_Auth = open(Auth_File)
Read_Auth=F_Auth.readlines() #执行前将账号密码文件读取到变量，避免循环读取
F_Auth.close()
User_Exit=[]
while True:
LoginSusses=False #循环开始前先定义登陆成功失败的变量。方便循环嵌套跳转
count = 0 #定义计数器，错误三次锁定
Read_Lock=open(Lock_File) #读取锁文件到变量Lock_List
Lock_List=[]
for i in Read_Lock.readlines():
line = i.strip(‘\n‘)
a = Lock_List.append(line)
Read_Lock.close()
Name=input(‘请输入你的账户:‘).strip()
for i in Read_Auth:
i = i.split()
if len(i) != 0:
User_Exit.append(i[0])
if Name not in User_Exit:
Zhuce = input(‘你输入的用户名不存在！，是否注册 Y/N‘)
if Zhuce == ‘N‘:
print(‘谢谢使用，再见‘)
break
if Zhuce == ‘Y‘:
Name=input(‘注册用户名：‘)
Pass=input(‘输入密码‘)
Dir_File=open(‘login.txt‘,"a")
Dir_File.write(‘%s %s %d\n‘%(Name,Pass,0))
Dir_File.close()
LoginSusses=True
break
if Name in Lock_List:
print("你的账户已经被锁定！！请联系管理员解锁！") #，用户登陆前先判断用户是否被锁定后在进行密码判断。
break
for line in Read_Auth:
line = line.split()
if Name in line:
for i in range(3): #定义3次循环，
Passwd=input(‘请输入你的密码：‘)
if Passwd == line[1]:
LoginSusses=True
# print ("Good，欢迎您登陆：%s" %Name)
break
else:
print ("你的密码错误，请重新输入")
count +=1 #每次密码错误后计数器count+1,3次后锁定，写入锁文件
if count == 3:
f = open(Lock_File,‘a‘)
f.write(‘%s\n‘%Name)
f.close()
print ("你的密码错误次数达到3次，已被锁定")
if LoginSusses is True:break #跳出2层循环
if count ==3: #锁定用户后跳出2层循环
break
if LoginSusses is True: #跳出2层循环
# print("Good，欢迎您登陆：%s" %Name)
break
if LoginSusses==True:
print("Good，欢迎您登陆：%s" %Name)
# for i in Read_Auth:
# print(i)
#----------------------------------------------------------购物车字典--------------------------------------------------------------------------------#
Shopping={
‘Macbook Air‘:[10,7999],
‘Iphone 6s ‘:[10,6543],
‘冰箱 ‘:[10,3999],
}
#----------------------------------------------------------用到的变量--------------------------------------------------------------------------------#
Shopping_cart_goods=[] #购物车物品
Shopping_cart_money=0 #购物车金额
for i in open(‘login.txt‘,‘r‘): # #账户金额
i=i.split()
if i[0] == Name:
Wallet=int(i[2])
Num=10 #购物车件数
#--------------------------------------------------------------------进入循环------------------------------------------------------------------------#
while True:
LoginSusses=True
LoginSusses2=True
#----------------------------------------------------获取购物车的编号，取值打印显示------------------------------------------------------------------#
a = ‘‘
aa=list(Shopping.keys())
for k,val in enumerate(aa):
a+=‘‘.join([‘‘.rjust(20,‘ ‘),str(k),‘‘.center(28,‘ ‘),str(val),‘‘.rjust(25,‘ ‘),str(Shopping[val][1]),‘‘.center(30,‘ ‘),str(Shopping[val][0]),‘\n‘])
#-------------------------------------------------------------进入循环，美化打印--------------------------------------------------------------------#
print(‘欢迎来到我的购物中心‘.center(100,‘?‘))
print(‘‘.ljust(1,‘?‘),‘‘.rjust(165,‘ ‘),‘‘.rjust(1,‘?‘))
print(‘账户名称：%s‘.rjust(25,‘ ‘)%(Name),‘账户余额：%d‘.center(90,‘ ‘)%(Wallet),‘购物车:%d‘.ljust(30,‘ ‘)%(len(Shopping_cart_goods)))
print(‘‘.ljust(1,‘?‘),‘‘.rjust(165,‘ ‘),‘‘.rjust(1,‘?‘))
print(‘‘.center(102,‘?‘),‘\n‘)
print(‘商品列表‘.center(163,‘ ‘))
print(‘‘.center(170,‘=‘))
print(‘编号‘.rjust(20,‘ ‘),‘物品‘.rjust(30,‘ ‘),‘单价‘.rjust(30,‘ ‘),‘余量‘.rjust(30,‘ ‘))
print(‘‘.center(170,‘=‘),‘\n‘)
print(a)
print(‘‘.center(170,‘=‘))
#----------------------------------------------------------用户输入判断-------------------------------------------------------------------------------#
Select=input(‘请输入购买商品的编号：(Q退出)‘).strip()
if Select == ‘Q‘:
print(‘谢谢光临，再见‘)
break
if Select.isdigit() is not True: ##不是Q，不是数字 提示指令错误
print (‘\033[1;31;40m请输入正确的指令\033[0m‘)
continue
if Select.isdigit() is True and int(Select) >= len(Shopping.keys()):
print (‘\033[1;31;40m请输入正确的序列号\033[0m‘)
continue
#----------------------------------------------------------购物车物品/金额判断------------------------------------------------------------------------#
else:
Shopping_cart_goods.append(aa[int(Select)]) #购物车物品变动
Shopping_cart_money+=Shopping[aa[int(Select)]][1] #购物车金额变动
Shopping[aa[int(Select)]][0]-=1
print(‘商品已加入购物车：‘)
#----------------------------------------------------------购物车物品结算判定-------------------------------------------------------------------------#
while True:
if LoginSusses==False:
break
Go_on=input(‘是否进入购物车结算，Y/N：‘)
if Go_on == ‘N‘:
break
if Go_on == ‘Y‘:
while True:
for i in Shopping_cart_goods:
print (‘商品：‘,str(i),‘价格：‘,Shopping[i][1])
print(‘总金额:%d‘%(Shopping_cart_money))
if Wallet-Shopping_cart_money >=0:
Shopping_cart_goods.clear()
Wallet-=Shopping_cart_money
print(‘购买成功,你花费了%d元，剩余%d元‘%(Shopping_cart_money,Wallet))
Shopping_cart_money=0
LoginSusses=False
break
#----------------------------------------------------------金额超出判断------------------------------------------------------------------------------#
else:
print(‘金额不足，请充值或删除购物车的商品继续结算：‘)
Go_on_1=input(‘删除购物车商品：D 充值：C，退出：Q‘)
if Go_on_1 == ‘Q‘:
LoginSusses2=False
LoginSusses=False
break
#----------------------------------------------------------充值----------------------------------------------------------------------------------#
elif Go_on_1 == ‘C‘:
while True:
print(Wallet)
C_money=input(‘充值金额：‘).strip()
if C_money.isdigit()is not True:
print(‘\033[1;31;40m请输入正确的金额\033[0m‘)
continue
else:
Wallet+=int(C_money)
print(‘账户余额：%d‘%(Wallet))
break
#----------------------------------------------------------购物车物品删除判断----------------------------------------------------------------------------------#
elif Go_on_1 == ‘D‘:
while True:
for i,val in enumerate(Shopping_cart_goods):
print(i,‘商品：‘,val,‘价格：‘,Shopping[val][1])
Go_on_2=input(‘请选择删除的商品序号：‘).strip()
if Go_on_2.isdigit()is not True:
print (‘\033[1;31;40m请输入正确的指令\033[0m‘)
continue
if int(Go_on_2) >= len(Shopping_cart_goods):
print (‘\033[1;31;40m请输入正确的序列号\033[0m‘)
continue
else:
Shopping_cart_money=Shopping_cart_money-Shopping[Shopping_cart_goods[int(Go_on_2)]][1] #删除物品首先先删除相对应的金额，其次在删除物品栏的物品
Shopping_cart_goods.remove(Shopping_cart_goods[int(Go_on_2)])
Shopping[aa[int(Select)]][0]+=1
break
else:
print (‘\033[1;31;40m请输入正确的指令\033[0m‘)
else:
print (‘\033[1;31;40m请输入正确的指令\033[0m‘)
continue
if LoginSusses2==False:
print(‘谢谢光临，再见!!!!!‘)
break
#----------------------------------------------------------程序完成----------------------------------------------------------------------------------#
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原文地址：http://www.cnblogs.com/Chen-PY/p/5132876.html
