Python实现信用卡系统(支持购物、转账、存取钱)

814次阅读  |  发布于5年以前

最近一直在做一个有关信用卡系统的项目,所有很少出来给大家打招呼了,今天也该告一段了,本项目是基于python编程语言做的,此信用卡支持购物,转账和存取钱,下面小编把需求及实现思路大概分享一下,仅供参考,如有bug欢迎各位大侠提出,共同学习进步,谢谢!

一、要求

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<price:     #金钱不足,可多次充钱,直到能买得起货物
              a=int(input(' 您的余额不足,请输入0/1选择是否充值,充值请输入1:'))
              if a==1:
                self.chongzhi()
              else:
                break      #退出充值模块
              if a==0:
                break      #不充值退出程序
        #打印购物车商品名、商品价格、消费总额、余额
        print('您的消费清单为:')
        for m,n in self.shopping_cart.items():
          print(m,n['price'],n['n'])
              #打印消费清单
          print('=============')
        print('您的当前余额为:%d,您的消费总额为:%d' % (self.money,self.consumption) )      #打印消费总额
        return self.consumption

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<amount:
            self.saving=0
            a=amount-self.saving
            self.balance-=a+interest-self.saving
            # self.debt+=amount+interest
            self.remaining_debt+=a+interest
        a='time:%s id:%s transaction: %s amount:%s interest %s \n'%(self.now_time,self.id,transaction,amount,interest)
        print(a)
        mulu=os.path.join(settings.ALL_USERS,self.id)
        path_name_liushui=os.path.join(mulu,str(self.id)+'name_liushui',str(self.now_data))
        with open(path_name_liushui,'a')as f:     #记录流水信息
          f.write(a)
        s=[self.balance,self.debt,self.remaining_debt,self.interest,self.saving,]   #更新基本信息
        path_name_base=os.path.join(mulu,str(self.id)+'name_base')
        pickle.dump(s,open(path_name_base,'wb'))

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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