python 之简单模拟银行系统功能（卡号申请、还款、支付、取现）

一、简单说明

1、源代码文件见附件　Credit.zip

2、关于转账功能，因时间问题，转账功能待续

4、逻辑图

二、代码

１、包encryption中的（password.py文件）

#!/usr/bin/env python# -*- coding: utf-8 -*-"""Created on Thu Nov 10 14:47:29 2016密码相关功能@author: toby"""import hashlib, re#密码进行MD5加密def md5(passwd):    hashs = hashlib.md5()   #创建MD5对象    hashs.update(passwd)    #生成加密串        return hashs.hexdigest()    #获取加密串#密码位数检测，只能是6位数字def check_digit(passwd):    com = re.compile('^\d{6,6}$')    temps = com.findall(passwd)    if len(temps) == 0:        return False    else:        return True#检测银行卡号位数def check_card(card):    com = re.compile('^\d{16,16}$')    temps = com.findall(card)    if len(temps) == 0:        return False    else:        return True

２、applys.py

#!/usr/bin/env python# -*- coding: utf-8 -*-"""Created on Thu Nov 10 14:42:29 2016卡号申请程序@author: toby"""from encryption import passwordimport shelve, random, getpass, time#申请资格评估def ssessment(income,age):    if income >= 3000 and age >= 22 and age < 60:        return True    else:        return False        #确定额度def quota(money):    if money > 3000 and money < 6000:        return 5000    if money > 6000 and money < 10000:        return 10000    if money > 10000 and money < 20000:        return 15000#生成卡号def carid():    carid = ""    for i in range(16):        temp = random.randint(0,9)        carid += str(temp)    return carid#新申请的用户数据入库def examine(key,val):    data = shelve.open('data.db')    data[key] = valif __name__ == "__main__":    print '''        信用卡申请资格评估        '''    income = input('月收入：')    age = input('年龄：')        #评估申请资格    if ssessment(income,age) == False:        print '评估结果：无申请资格'    else:        print '''        评估结果：可申请        请填写详细资料        '''        name = raw_input('姓名：')        card = raw_input('×××：')        phone = raw_input('手机：')        address = raw_input('地址：')                #根据条件自动生成固定额度        fixed_amount = quota(income) #调用自动生成额度函数                #初次申请卡号，初始记录还款的key为0        repayment_amount = 0    #初始化还款金额，首次为0元        #自动生成卡号        kaid = carid() #调用自动生成16位卡号函数                while True:            passwd1 = getpass.getpass('设置密码：')            passwd2 = getpass.getpass('确认密码：')            if passwd1 != passwd2:                print '密码不一致'                continue            if password.check_digit(passwd1) == False: #检测密码合法性                print '只能输入6位数字密码'                continue            else:                print '------卡号申请成功！------'                print '卡号为： %s' % kaid                print '可用额度： %s' % fixed_amount                date = time.strftime('%Y-%m-%d %H:%M:%S') #记录申请时间                repayment_time = time.strftime('%Y-%m-%d') #申请通过当天日期为还款日                passwd_data = password.md5(passwd1) #密码使用MD5加密                temp = {'date':date,'name':name,'age':age,'income':income,'card':card,'phone':phone,'address':address,'passwd':passwd_data,'fixed_amount':fixed_amount,'temp_money':int(fixed_amount),'repayment_amount':repayment_amount,'repayment_time':repayment_time}                    examine(kaid,temp) #调用数据入库函数进行将新申请的数据存入模拟数据库                break

3、login.py

# -*- coding: utf-8 -*-"""Created on Fri Nov 11 21:35:04 2016模拟取款机登录入口程序@author: toby"""from encryption import passwordimport getpassfrom data_function import *if __name__ == "__main__":    try:        while True:            print '''            ------银行系统登录入口------            '''            card_number = raw_input('卡号：')            card_password = getpass.getpass('口令：')                        if password.check_card(card_number) == False:                print '卡号位数不正确，请仔细输入'                continue            if check_card_active(card_number) == False:                print '对不起，该卡号不存在'                continue            if password.check_digit(card_password) == False:                print '密码无效'                continue            passwd_md5 = password.md5(card_password) #将输入的密码进行加密，用于和数据库中的md5密码匹配            db_passwd = get_data(card_number,'passwd') #从数据库读取对应卡号的密码                        if passwd_md5 != db_passwd: #输入的密码进行加密后和从数据库中读取的MD5密码串进行配对                print '密码错误'                continue            else:                while True:                    print '''                        XX银行欢迎您                    1 ----------------- 取现                    2 ----------------- 查询                    3 ----------------- 还款                    4 ----------------- 转账                    5 ----------------- 退出                    '''                    main_menu = input('选择您需要的操作（1-5）：')                    if main_menu == 1:                        cash_amount = input('取款金额：')                        print '''                        温馨提示：信用卡取现需收取5%手续费                        '''                        action = raw_input('是否继续套现(y/n):')                        if action == 'y':                            if cash_debit(card_number,int(cash_amount)): #调用套现接口                                print '请提取现金'                                continue                            else:                                print '机器故障，无法提取'                                break                        if action == 'no':                            continue                    if main_menu == 2:                        print '''                        1 ----------------- 查询余额                        2 ----------------- 查询明细                        '''                        sub_menu = input('选择您需要的操作（1-2）:')                        if sub_menu == 1:                            get_all_data(card_number)                            action = raw_input('是否返回主菜单(y):')                            if action == 'y':                                continue                        if sub_menu == 2:                            get_water(card_number) #调用查询流水函数                            action = raw_input('是否返回主菜单(y):')                            if action == 'y':                                continue                    if main_menu == 3:                        temp_money = get_data(card_number,'temp_money') #读取可用金额                        repayment_amount = get_data(card_number,'repayment_amount') #读取需还款金额                        print '''                        可用余额: %s (人民币)                        您需还款: %s (人民币)                        ''' % (temp_money,repayment_amount)                        money = input('还款金额:')                        if repayment_interface(card_number,int(money)) == True:                            print '还款成功'                        else:                            print '还款失败'                        action = raw_input('是否返回主菜单(y):')                        if action == 'y':                            continue                    if main_menu == 4:                        print '转账功能正在开发'                        action = raw_input('是否返回主菜单(y):')                        if action == 'y':                            continue                    if main_menu == 5:                        print '柜员机系统已退出'                        break            continue    except Exception,e:        print Exception,":::-->",e

４、data_function.py

# -*- coding: utf-8 -*-"""Created on Fri Nov 11 16:10:05 2016数据操作相关功能#我的卡号：1098521606032848@author: toby"""from encryption import passwordimport shelve, getpass, time#数据库读取操作，这是一个全局动作f = shelve.open('data.db')#检测卡号是否存在def check_card_active(card_number):    if f.get(card_number,None) != None:  #判断对应卡号是否存在        return True    else:        return False#检测对应卡号中对应的关键字数据，例如检测对应卡号密码def get_data(card,keys):    data = f[card]    return data[keys]#查询对应卡号的所有数据def get_all_data(card):    data = f[card]    print '''    卡号: %s    户名: %s    固定额度: %s (人民币)    可用余额: %s (人民币)    需还款: %s (人民币)    还款日: %s    '''% (card,data['name'],data['fixed_amount'],data['temp_money'],data['repayment_amount'],data['repayment_time']) #扣款通用接口，正常POS机消费或者网银支付 ，无需手续费def pos_smart_pay(card_number,card_password,price):    if check_card_active(card_number) == False:        print '对不起，卡号有误！'        return False    passwd_md5 = password.md5(card_password) #将输入的密码进行加密，用于和数据库中的md5密码匹配    db_passwd = get_data(card_number,'passwd') #从数据库读取对应卡号的密码    if passwd_md5 != db_passwd:        print '支付密码错误'        return False    else:        data = f[card_number]   #读取对应卡号信息        existing = data['temp_money'] #读取现有金额        if price > existing:            print '对不起，余额不足'        else:            result = existing - price #现有金额减去正常消费价格            data['temp_money'] = int(result) #临时存储计算结果            f[card_number] = data #计算结果数据入库            current_repayment_amoount = data['repayment_amount'] #读取现有还款金额            res = current_repayment_amoount + price #现有还款金额 + 当前消费金额 = 需还款的金额            data['repayment_amount'] = int(res)            f[card_number] = data #需还款金额数据入库            action = "POS消费"            record_water(card_number,action,price)            f.close()            return True#取款机取款功能 需5%手续费def cash_debit(card_number,money):    data = f[card_number]   #读取对应卡号信息    existing = data['temp_money'] #读取现有可用金额    if money > existing:        print '''        对不起，余额不足，无法套现        您当前可用金额: %s        ''' % existing    else:        repayment = money * 0.05 #套现时计算手续费        print '''        取款金额: %s        手续费: %s        ''' % (money, repayment)        result = existing - money - repayment #现有金额-套现金额(再减去手续费)        data['temp_money'] = int(result) #临时存储计算结果        f[card_number] = data #计算结果数据入库        current_repayment_amoount = data['repayment_amount'] #读取现有还款金额        temporary = current_repayment_amoount + money + (money * 0.05) #现有还款金额 + 当前套现金额+手续费        data['repayment_amount'] = int(temporary)        f[card_number] = data #需还款金额数据入库        #调用记录流水的函数进行记录流水        action = "取款机套现"        record_water(card_number,action,money)        f.close()        return True#通用还款接口def repayment_interface(card_number,money):    try:        data = f[card_number]        current_repayment_amoount = data['repayment_amount'] #读取需还款金额        data['repayment_amount'] = current_repayment_amoount - money #需还款金额 - 传入进来的还款额 = 剩余还款额（全部还清后这里为0元，还多少减多少）        f[card_number] = data #剩余还款额数据入库        existing = data['temp_money'] #读取现有可用金额        data['temp_money'] = existing + money #现有可用金额 + 已传入进来的需还金额 （累加到可用金额，还多少就会累加多少）        f[card_number] = data #还款后累加可用后的金额数据入库        action = "还款"        record_water(card_number,action,money)        f.close()        return True    except Exception,e:        print Exception,":::-->",e#通用记录流水接口def record_water(card_number,action,money):    water = shelve.open('water_data/%s.list' % card_number)    date = time.strftime('%Y-%m-%d %H:%M:%S')    water[date] = "行为：%s, 金额：%s" % (action,money)    water.close()#通用查询流水接口def get_water(card_number):    water = shelve.open('water_data/%s.list' % card_number)    for val in water:        print val, water[val]

５、payment_interface.py

# -*- coding: utf-8 -*-"""Created on Sat Nov 12 13:47:03 2016模拟第三方支付@author: toby"""import getpassfrom data_function import *#第三方支付接口while True:    payment_card = raw_input('支付卡号:')    payment_price = input('价格:')    payment_password = getpass.getpass('支付密码:')    if pos_smart_pay(payment_card,payment_password,int(payment_price)) == True:        print '支付完成'        break    else:        print '支付失败'        continue