二、思路

1.购物类buy

接收 信用卡类 的信用卡可用可用余额，

返回消费金额

2.信用卡（ATM）类

接收上次操作后，信用卡可用余额，总欠款，剩余欠款，存款

其中：　1.每种交易类型不单独处理金钱，也不单独记录流水账，每种交易类型调用处理金钱的函数（传入交易类型，交易金额）

　　　　2.处理金钱的函数，调用配置文件中关于每种交易类型的加减钱和利率

返回本次操作后信用卡可用余额，总欠款，剩余欠款，存款

3.客户端

银行管理员注册登陆

普通用户注册登陆

发送需求：注册、登陆、交易类型、交易金额

4.服务器端

调用购物类，创建购物对象(购物接口)

调用信用卡（ATM）类，处理还款，转账等操作，对利息按月记录，写入文件

5.定时任务

定时执行程序，以计算利息。

三、代码

3.1配置文件

import os
 
BASE_DIR = os.path.dirname(os.path.dirname(__file__)) #配置文件的上层目录
DB_DIR=os.path.join(BASE_DIR,'db') #数据文件夹
ADMIN=os.path.join(DB_DIR,'admin')
ALL_USERS=os.path.join(DB_DIR,'allusrs')
A=os.path.join(BASE_DIR,'db','s')
LOG=os.path.join(BASE_DIR,'log')
 
 
TRANSACTION={
 'repay':{'action':'plus','interest':0}, #还款
 'withdraw':{'action':'minus','interest':0.05},#取现
 'transfer':{'action':'minus','interest':0.05},#转账
 'consume':{'action':'minus','interest':0},#消费
 'saving':{'action':'plus','interest':0} #存款
}
 

3.2公共类

3.2.1购物类

class buy:
 goods=[
 {"name": "电脑", "price": 1999},
 {"name": "鼠标", "price": 10},
 {"name": "游艇", "price": 20},
 {"name": "美女", "price": 998},
 ]
 
 def __init__(self,money,consumption,shopping_cart,):
 self.money=money
 self.consumption=consumption
 self.shopping_cart=shopping_cart
 
 def gouwu(self): #购物模块
 print('您的当前余额为：%d' %self.money)
 num=int(input('请输入商品序号：'))
 num-=1
 if self.goods[num]["name"] in self.shopping_cart.keys(): #goods[num]["name"]取商品名
 self.shopping_cart[self.goods[num]["name"]]['n']+=1 #商品数量+1
 else:
 self.shopping_cart[self.goods[num]["name"]]={"price":self.goods[num]["price"],'n':1,} # 创建购物车字典 {keys{"price"：价格,数量：1}}
 self.money-=self.shopping_cart[self.goods[num]["name"]]["price"]*self.shopping_cart[self.goods[num]["name"]]['n'] #单价*数量
 self.consumption+=self.shopping_cart[self.goods[num]["name"]]["price"]*self.shopping_cart[self.goods[num]["name"]]['n']
 
 def yichu(self): #移除购物车模块
 c=int(input(' 请输入0/1选择是否移除购物车商品, 移除请输入1:'))
 if c==1:
 e=int(input(' 请输入要移除的商品序号:'))
 d=self.goods[e-1]
 if d in self.shopping_cart.keys(): #判断要移除的商品是否在购物车内
 self.shopping_cart.remove(d) #移除商品
 self.money=self.money+self.goods[self.goods.index(d)]["price"] #余额增加
 self.consumption=self.consumption-self.goods[self.goods.index(d)]["price"] #消费总额减少
 else:
 print('商品不存在')
 def chongzhi(self): #充值模块
 pay=int(input('请输入充值金额'))
 self.money=self.money+pay
 print('您的当前余额为：%d' % self.money) #显示当前余额
 
 def main(self):
 print('商品清单：')
 for m,n in enumerate(self.goods,1):
 print(m)
 for v in n.values():
 print(v)
 print('=============')
 #消费总额清零
 self.consumption=0
 buy=True #定义默认一直购物
 while buy:
 price=0 #定义初始价格
 b=1 #定义默认不退出购物或充值状态
 if self.money>=price:
 
 #消费模块；金钱大于货物价格时，才能开始购物
 while self.money>=price:
 #计价模块，有钱就可以一直购物
 self.gouwu()
 #移除购物车商品模块
 self.yichu()
 if self.money>=0:
 print('您的当前余额为：%d' %self.money) #显示当前余额
 b=int(input(' 请输入0/1选择是否继续购物, 购物请输入1:'))
 if b==0: #
 break #退出计价模块
 if b==0: #如果不购物
 break #不购物退出整个购物程序
 #充值模块
 else:
 while self.money
3.2.2 信用卡ATM类

class Atm:
 credit=15000 #信用卡额度
 def __init__(self,balance,debt,remaining_debt,interest,saving,id):
 self.id=id #信用卡id
 self.balance=balance #信用卡可用金额
 self.debt=debt #总欠款
 self.remaining_debt=remaining_debt #剩余欠款
 self.interest=interest #手续费
 self.saving=saving #存款
 self.now_time=time.strftime("%Y-%m-%d %H:%M:%S")
 self.now_data=time.strftime("%Y-%m")
 self.struct_time=time.gmtime(time.time())
 if self.struct_time.tm_mday>22:
 self.now_data=self.struct_time.tm_year+'-'+str(int(self.struct_time.tm_mon)+1)
 
 def account_info(self):#打印账户信息
 return '账户id%s 信用卡额度%s;信用卡可用金额%s;剩余欠款%s;'%(self.id,self.credit,self.balance,self.remaining_debt,)
 def ret_account_info(self):
 return [self.id,self.credit,self.balance,self.debt,self.remaining_debt,self.interest]
 def repay(self,amount):#还款
 self.handel_money('repay',amount)
 def withdraw(self,amount): #取现
 self.handel_money('withdraw',amount)
 def transfer(self,amount): #转账
 self.handel_money('transfer',amount)
 def consume(self,amount): #消费
 self.handel_money('consume',amount)
 def saves(self,amount):
 self.handel_money('saving',amount)
 def transaction(self,a,amount):
 dic={
 '1':self.repay,
 '2':self.withdraw,
 '3':self.transfer,
 '4':self.consume,
 '5':self.saves
 }
 print("debug: a:",type(a),"amount:",type(amount))
 
 print(a)
 print(dic[a])
 print(dic["5"])
 dic[a](amount)
 print("end debug")
 
 def handel_money(self,transaction,amount): #交易类型，
 amount=int(amount)
 interest=amount*settings.TRANSACTION[transaction]['interest'] #手续费计算
 if settings.TRANSACTION[transaction]['action']=='plus':
 
 if amount<=self.remaining_debt:
 self.remaining_debt-=amount
 self.balance+=amount
 else:
 self.balance+=self.remaining_debt
 self.remaining_debt=0
 self.saving+=amount-self.remaining_debt
 else:
 
 if self.saving

　3.3服务器端：

#!/usr/bin/env python
# -*- coding: utf-8 -*-
 
import sys,os
import hashlib
import pickle
import time
import socketserver
sys.path.append(os.path.dirname(os.path.dirname(__file__)))
from config import settings
from lib import modules
from lib.modules import *
 
class Myserver(socketserver.BaseRequestHandler):
 
 def md5(self,pwd):
 '''
 对密码进行加密
 :param pwd: 密码
 :return:
 '''
 hash=hashlib.md5(bytes('xx7',encoding='utf-8'))
 hash.update(bytes(pwd,encoding='utf-8'))
 return hash.hexdigest()
 
 
 def login(self,usrname,pwd,x):
 '''
 登陆
 :param usrname: 用户名
 :param pwd: 密码
 :return:是否登陆成功
 '''
 conn=self.request
 if x=='1':
 path_name_pwd=os.path.join(settings.ADMIN,usrname)
 else:
 mulu=os.path.join(settings.ALL_USERS,usrname)
 path_name_pwd=os.path.join(mulu,usrname+'name_pwd')
 s=pickle.load(open(path_name_pwd,'rb'))
 if usrname in s:
 if s[usrname]==self.md5(pwd): #和加密后的密码进行比较
 return True
 else:
 return False
 else:
 return False
 
 
 def regist(self,usrname,pwd,x):
 '''
 注册
 :param usrname: 用户名
 :param pwd: 密码
 :return:是否注册成功
 '''
 
 conn=self.request
 if x=='1':
 mulu=os.path.join(settings.ADMIN,usrname)
 else:
 mulu=os.path.join(settings.ALL_USERS,usrname)
 
 
 if os.path.exists(mulu):
 return False
 else:
 os.mkdir(mulu)
 s={}
 s[usrname]=self.md5(pwd)
 path_name_pwd=os.path.join(mulu,usrname+'name_pwd')
 pickle.dump(s,open(path_name_pwd,'wb'))
 path_name_base=os.path.join(mulu,usrname+'name_base')
 pickle.dump([15000,{},0,0,0],open(path_name_base,'wb'))
 path_name_liushui=os.path.join(mulu,usrname+'name_liushui')
 os.mkdir(path_name_liushui)
 return True
 
 def user_identity_authentication(self,usrname,pwd,ret,x):
 '''
 判断注册和登陆，并展示用户的详细目录信息，支持cd和ls命令
 :return:
 '''
 conn=self.request
 if ret=='1':
 r=self.login(usrname,pwd,x)
 if r:
 conn.sendall(bytes('y',encoding='utf-8'))
 else:
 conn.sendall(bytes('n',encoding='utf-8'))
 elif ret=='2':
 # print(usrname,pwd)
 if x=='1':
 r=self.regist(usrname,pwd,x)
 else: #用户注册
 s=[0,1]
 pickle.dump(s,open(settings.A,'wb'))
 while True:
 ret=pickle.load(open(settings.A,'rb'))
 if ret[0]==0:
 time.sleep(30)
 continue
 elif ret[0]==1 or ret[0]==2:
 break #默认值已更改，银行管理员已操作
 
 if ret[0]==1: #如果管理员同意
 r=self.regist(usrname,pwd,x)
 else:
 r=0
 s=[0,0]
 pickle.dump(s,open(settings.A,'wb'))
 if r:
 conn.sendall(bytes('y',encoding='utf-8'))
 else:
 conn.sendall(bytes('n',encoding='utf-8'))
 def interactive(self,usrname): #进行交互
 conn=self.request
 while True:
 c=conn.recv(1024) #接收用户交互选项
 r=str(c,encoding='utf-8')
 mulu=os.path.join(settings.ALL_USERS,usrname)
 path_name_base=os.path.join(mulu,usrname+'name_base')
 s=pickle.load(open(path_name_base,'rb'))
 
 #打印账户信息
 obj=modules.Atm(s[0],s[1],s[2],s[3],s[4],usrname) #Atm对象
 a=obj.account_info() #接收账户信息
 conn.sendall(bytes(a,encoding='utf-8'))
 
 b=obj.ret_account_info()
 
 
 
 if r== '4':
 buy_obj=modules.buy(b[2],0,{})
 amount=buy_obj.main()
 elif r=='q':
 break
 else:
 s=conn.recv(1024)
 amount=str(s,encoding='utf-8')
 
 obj.transaction(r,amount)
 
 
 pass
 
 
 def handle(self):
 conn=self.request
 x=conn.recv(1024)
 x=str(x,encoding='utf-8')
 conn.sendall(bytes('收到用户类别',encoding='utf-8'))
 while True:
 if x=='1' or x=='2':
 b=conn.recv(1024)
 ret=str(b,encoding='utf-8')
 conn.sendall(bytes('b ok',encoding='utf-8'))
 c=conn.recv(1024)
 r=str(c,encoding='utf-8')
 usrname,pwd=r.split(',')
 print(usrname,pwd)
 self.user_identity_authentication(usrname,pwd,ret,x) #登陆或注册验证
 if x=='2':#普通用户身份验证成功后
 self.interactive(usrname)
 
 pass
 
 break
 elif x=='q':
 break
 
if __name__=='__main__':
 sever=socketserver.ThreadingTCPServer(('127.0.0.1',9999),Myserver)
 sever.serve_forever()

3.4 用户端

#!/usr/bin/env python
# -*- coding: utf-8 -*-
'''
本程序作为用户或银行管理员的入口，其中c=1代表银行管理员，c=2代表普通用户
'''
import pickle
import sys
import time
import os
import socket
sys.path.append(os.path.dirname(os.path.dirname(__file__)))
from config import settings
from lib import *
from lib.modules import *
 
def login(usrname,pwd):
 '''
 登陆
 :param usrname:用户名
 :param pwd:密码
 :return:是否登陆成功
 '''
 obj.sendall(bytes(usrname+','+pwd,encoding='utf-8'))
 ret=obj.recv(1024)
 r=str(ret,encoding='utf-8')
 if r=='y':
 return 1
 else:
 return 0
 
def regist(usrname,pwd,x):
 '''
 注册
 :param usrname:用户名
 :param pwd:密码
 :return:是否注册成功
 '''
 obj.sendall(bytes(usrname+','+pwd,encoding='utf-8'))
 
 ret=obj.recv(1024)
 r=str(ret,encoding='utf-8')
 if r=='y':
 return 1
 else:
 return 0
def user_identity_authentication(usrname,pwd,x):
 '''
 选择登陆或注册，展示用户的详细目录信息，支持cd和ls命令
 :return:
 '''
 a=input('请选择1.登陆 2.注册')
 obj.sendall(bytes(a,encoding='utf-8'))
 obj.recv(1024)
 if a=='1':
 ret=login(usrname,pwd)
 if ret:
 print('登陆成功')
 return 1
 else:
 print('用户名或密码错误')
 return 0
 elif a=='2':
 ret=regist(usrname,pwd,x)
 if ret:
 print('注册成功')
 return 1
 else:
 print('用户名已存在或银行管理员拒绝')
 return 0
def main(x):
 usrname=input('请输入用户名')
 pwd=input('请输入密码')
 if user_identity_authentication(usrname,pwd,x): #如果验证身份成功
 if x=='1': #处理用户注册信息
 
 while True:
 s=pickle.load(open(settings.A,'rb'))
 if s[1]==0:
 time.sleep(30)
 continue
 elif s[1]==1:
 while True:
 a=input('用户请求注册，输入1同意，2拒绝')
 if a=='1':
 s=[1,0]
 pickle.dump(s,open(settings.A,'wb'))
 break
 elif a=='2':
 s=[2,0]
 pickle.dump(s,open(settings.A,'wb'))
 break
 else:
 print('输入有误')
 break
 else: #普通用户登陆后
 interactive() #进行交互
 
 
def interactive():
 while True:
 a=input('请选择 1.还款 2.取现 3.转账 4.消费 5.存钱 q退出')
 obj.sendall(bytes(a,encoding='utf-8'))
 r=obj.recv(1024) #接收账户信息
 ret=str(r,encoding='utf-8')
 print(ret)
 if a !='4'and a !='q':
 b=input('请输入金额')
 obj.sendall(bytes(b,encoding='utf-8'))
 elif a=='q':
 break
 
 
 
obj=socket.socket() #创建客户端socket对象
obj.connect(('127.0.0.1',9999))
while True:
 x=input('请选择1.银行管理员 2.用户 q、退出')
 obj.sendall(bytes(x,encoding='utf-8'))
 obj.recv(1024) #确认收到用户类别
 if x=='1' or x=='2':
 main(x)
 break
 elif x=='q':
 break
 else:
 print('输入有误请重新输入')
 
obj.close()

　3.5定时任务

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import os,sys
import json,pickle
import time
sys.path.append(os.path.dirname(os.path.dirname(__file__)))
from config import settings
 
 
 
def main():
 card_list = os.listdir(settings.ALL_USERS)
 for card in card_list:
 basic_info = pickle.load(open(os.path.join(settings.ALL_USERS, card, card+'name_base')))
 struct_time = time.localtime()
 
 # 循环账单列表，为每月的欠款计息。并写入到当月账单中
 for item in basic_info['debt']:
 interest = item['total_debt'] * 0.0005
 if basic_info[4] >= interest:
 basic_info[4] -= interest
 else:
 temp = interest - basic_info[4]
 basic_info[4]=0
 basic_info[0] -= temp
 pickle.dump(
 basic_info,
 open(os.path.join(settings.ALL_USERS, card, card+'name_base'),'w')
 )
 
 # 如果当前等于10号(9号之前)
 # 当前余额为负值，则将值添加到账单列表中，开始计息，同时，本月可用额度恢复。
 date = time.strftime("%Y-%m-%d")
 if struct_time.tm_mday == 11 and basic_info[2]>0:
 dic = {'date': date,
 "total_debt": basic_info[2],
 "balance_debt": basic_info[2],
 }
 basic_info[1].append(dic)
 # 恢复可用额度
 basic_info[0] = 15000
 pickle.dump(
 basic_info,
 open(os.path.join(settings.ALL_USERS, card, card+'name_base'),'w')
 )
 
 
def run():
 main()
　　
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