• python3 实现简单信用卡管理程序


    1、程序执行代码:

    #Author by Andy
    #_*_ coding:utf-8 _*_
    import os,sys,time
    Base_dir=os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
    sys.path.append(Base_dir)
    str="欢迎使用银行信用卡自助服务系统!
    "
    for i in str:
        sys.stdout.write(i)
        sys.stdout.flush()
        time.sleep(0.3)
    while True:
        print("1、管理人员入口。")
        time.sleep(0.3)
        print("2、用户登录入口。")
        print("3、退出请按q!")
        choice=input(":")
        from core import main
        Exit_flag=True
        while Exit_flag:
            user_choice=main.menu(choice)
            if user_choice == '1':
                main.get_user_credit()
            elif user_choice == '2':
                main.repayment()
            elif user_choice == '3':
                main.enchashment()
            elif user_choice == '4':
                main.change_pwd()
            elif user_choice == '5':
                main.transfer()
            elif user_choice == '6':
                main.billing_query()
            elif user_choice == '7':
                print("该功能正在建设中,更多精彩,敬请期待!")
            elif user_choice == 'a':
                main.change_user_credit()
            elif user_choice == 'b':
                main.add_user()
            elif user_choice == 'c':
                main.del_user()
            elif user_choice == 'd':
                main.change_pwd()
            elif user_choice == 'q' or user_choice == 'Q':
                print("欢迎再次使用,再见!")
                Exit_flag = False
    

    2、程序功能函数:

    #Author by Andy
    #_*_ coding:utf-8 _*
    import json,sys,os,time,shutil
    Base_dir=os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
    sys.path.append(Base_dir)
    #定义认证装饰器
    def auth(func):
        def wrapper(*args,**kwargs):
            # print("请输入卡号和密码进行验证!")
            f = open(Base_dir+'data\user_db.txt', 'r')
            Log_file = open(Base_dir+'logslog.txt', 'a+', encoding='utf-8')
            Bill_log_file = open(Base_dir + 'logs\bill_log.txt', 'a+', encoding='utf-8')
            func_name = func.__name__
            Time_formate = '%Y-%m-%d  %X'
            start_time = time.strftime(Time_formate, time.localtime())
            user_data = json.load(f)
            count=0
            while count < 3:
                global user_id
                global user_pwd
                user_id = input('请输入您的卡号:')
                user_pwd = input('请输入您的密码:')
                if user_id in user_data:
                    if user_pwd == user_data[user_id]['Password']:
                        Log_file.write(start_time + ' 卡号 %s 认证成功!
    ' % user_id)
                        Log_file.flush()
                        time.sleep(1)
                        Log_file.close
                        keywords = func(*args, **kwargs)
                        if func_name == 'repayment' or func_name == 'transfer' or func_name == 'enchashment':
                            Bill_log_file.write(start_time + ' 卡号 '+ user_id + ' 发起 ' + func_name + ' 业务,金额为: %s 
    ' % keywords)
                            Bill_log_file.flush()
                            time.sleep(1)
                            Bill_log_file.close
                            return keywords
                        else:
                            return keywords
                    else:
                        print('卡号或密码错误!请重新输入!')
                        Log_file.write(start_time + ' 卡号 %s 认证失败!
    ' % user_id)
                        Log_file.flush()
                        time.sleep(1)
                        Log_file.close
                        count +=1
                else:
                    print("卡号不存在,请确认!")
                if count == 3:
                    print("对不起,您已输错3三次,卡号已锁定!")
                    Log_file.write(start_time + ' 卡号 %s 因连续三次验证失败而被锁定!
    ' % user_id)
                    time.sleep(1)
                    Log_file.close
        return wrapper
    
    #定义菜单函数,根据不同用户显示不通菜单。
    
    def menu(choice):
        if choice == '2':
            print( "请选择服务类别:
    "
                  "1、查询信用额度。
    "
                  "2、信用卡还款。
    "
                  "3、信用卡提现。
    "
                  "4、修改口令。
    "
                  "5、信用卡转账。
    "
                  "6、信用卡账单查询。
    "
                  "7、轻松购物。
    "
                  "8、退出请按q!
    ")
            service_items = input('-->')
        elif choice == '1':
            print("请选择服务类别:
    "
                  "a、修改用户信用额度。
    "
                  "b、新增信用卡用户。
    "
                  "c、删除信用卡用户。
    "
                  "d、修改用户口令。
    "
                  "e、退出请按q!
    ")
            service_items = input('-->')
        else:
            print("感谢使用,祝生活愉快!")
            exit()
        return service_items
    # 定义备份用户数据文件函数
    def back_up_file():
        Time_formate = '%Y-%m-%d'
        Sys_time = time.strftime(Time_formate, time.localtime())
        shutil.copy(Base_dir + "data\user_db.txt", Base_dir + "data\user_db--" + Sys_time + ".bak.txt")
    #定义获取用户数据信息函数
    def get_user_data():
        with open(Base_dir + "data\user_db.txt", 'r+',encoding='utf-8') as f:
            user_data = json.load(f)
        return user_data
    #定义用户数据变量
    user_data = get_user_data()
    #定义查询信用额度函数
    @auth
    def get_user_credit():
        user_credit=user_data[user_id]['Credit']
        print("您目前的信用额度为:%s元
    "
              %(user_credit))
        time.sleep(2)
        return user_credit
    
    #定义信用卡还款函数
    @auth
    def repayment():
        user_data = get_user_data()
        user_credit=int(user_data[user_id]['Credit'])
        user_balance=int(user_data[user_id]['Balance'])
        user_bill = user_credit - user_balance
        print("您目前需要还款金额为:%s元.
    " %user_bill)
        Exit_flag=True
        while Exit_flag:
            repayment_value=input("请输入还款金额:")
            if repayment_value.isdigit():
                repayment_value=int(repayment_value)
                user_data[user_id]['Balance'] = user_data[user_id]['Balance'] + repayment_value
                f = open(Base_dir + "data\user_db.txt", 'r+', encoding='utf-8')
                json.dump(user_data, f)
                f.close()
                print("恭喜,还款成功!")
                print("您目前需要还款金额为:%s元.
    " % (user_data[user_id]['Credit'] - user_data[user_id]['Balance']))
                time.sleep(1)
                Exit_flag = False
                return repayment_value
            else:
                print("请输入正确的金额!")
    #定义信用卡提现函数
    @auth
    def enchashment():
        user_credit=user_data[user_id]['Credit']
        print("你可用的取现额度为:%s" %user_credit)
        Exit_flag=True
        while Exit_flag:
            enchashment_value=input("请输入您要取现的金额:")
            if enchashment_value.isdigit():
                enchashment_value=int(enchashment_value)
                if enchashment_value % 100 == 0:
                    if  enchashment_value <= user_credit:
                        user_data[user_id]['Balance'] = user_credit - enchashment_value
                        f = open(Base_dir + "data\user_db.txt", 'r+', encoding='utf-8')
                        json.dump(user_data, f)
                        f.close()
                        print("取现成功,您目前的可用额度为:%s" %user_data[user_id]['Balance'])
                        time.sleep(1)
                        Exit_flag = False
                        return enchashment_value
                    else:
                        print("您的取现额度必须小于或等于您的信用额度!")
                else:
                    print("取现金额必须为100的整数倍!")
            else:
                print("输入有误,取现金额必须为数字,且为100的整数倍")
    
    @auth
    #定义信用卡转账函数
    def transfer():
        user_balance=user_data[user_id]['Balance']
        print("您目前的可用额度为:%s" %user_balance)
        Exit_flag=True
        while Exit_flag:
            transfer_user_id = input("请输入对方帐号:")
            transfer_value = input("请输入转账金额:")
            if transfer_user_id in user_data.keys():
                while Exit_flag:
                    if transfer_value.isdigit():
                        while Exit_flag:
                            transfer_value=int(transfer_value)
                            user_passwd=input("请输入口令以验证身份:")
                            if user_passwd == user_data[user_id]['Password']:
                                user_balance = user_balance- transfer_value
                                user_data[transfer_user_id]['Balance']=int(user_data[transfer_user_id]['Balance']) + transfer_value
                                f = open(Base_dir + "data\user_db.txt", 'r+', encoding='utf-8')
                                json.dump(user_data, f)
                                f.close()
                                print("转账成功,您目前的可用额度为:%s" % user_balance)
                                time.sleep(1)
                                Exit_flag = False
                                return transfer_value
                            else:
                                print("密码错误,请重新输入!")
                    else:
                        print("转账金额,必须为数字,请确认!")
            else:
                print("帐号不存在,请确认!")
    
    # @auth
    #定义信用卡账单查询函数
    @auth
    def billing_query():
        print("我们目前仅提供查询所有账单功能!")
        print("您的账单为:
    ")
        Bill_log_file = open(Base_dir + 'logs\bill_log.txt', 'r', encoding='utf-8')
        for lines in Bill_log_file:
            if user_id in lines:
                print(lines.strip())
        print()
        time.sleep(1)
    
    
    #定义修改信用卡额度函数
    def change_user_credit():
        print("您正在修改用户的信用额度!")
        Exit_flag=True
        while Exit_flag:
            target_user_id=input("请输入您要修改的用户卡号:
    ")
            if target_user_id in user_data.keys():
                while Exit_flag:
                    new_credit=input("请输入新的信用额度:
    ")
                    if new_credit.isdigit():
                        new_credit= int(new_credit)
                        user_data[target_user_id]['Credit']=new_credit
                        print("卡号 %s 的新信用额度为:%s " %(target_user_id,new_credit))
                        choice = input("确认请输入1或者按任意键取消:
    ")
                        if choice == '1':
                            f = open(Base_dir + "data\user_db.txt", 'r+', encoding='utf-8')
                            json.dump(user_data, f)
                            f.close()
                            print("信用额度修改成功,新额度已生效!")
                            print("卡号 %s 的新信用额度为:%s " % (target_user_id, user_data[target_user_id]['Credit']))
                            time.sleep(1)
                            Exit_flag = False
                        else:
                            print("用户的信用额度未发生改变!")
                    else:
                        print("信用额度必须为数字!请确认!")
            else:
                print("卡号不存在,请确认!")
    #定义修改口令函数
    @auth
    def change_pwd():
        print("注意:正在修改用户密码!")
        Exit_flag = True
        while Exit_flag:
            old_pwd = input("请输入当前密码:")
            if old_pwd == get_user_data()[user_id]["Password"]:
                new_pwd = input("请输入新密码:")
                new_ack = input("请再次输入新密码:")
                if new_pwd == new_ack:
                    user_data=get_user_data()
                    user_data[user_id]["Password"]=new_pwd
                    f = open(Base_dir + "data\user_db.txt", 'r+', encoding='utf-8')
                    json.dump(user_data, f)
                    f.close()
                    print("恭喜,密码修改成功!")
                    time.sleep(1)
                    Exit_flag = False
                else:
                    print("两次密码不一致,请确认!")
            else:
                print("您输入的密码不正确,请在确认!")
    
    #定义新增信用卡函数
    def add_user():
        Exit_flag = True
        while Exit_flag:
            user_id = input("user_id:")
            Balance = input("Balance:")
            Credit = input("Credit:")
            if Balance.isdigit() and Credit.isdigit():
                Balance = int(Balance)
                Credit = int(Credit)
            else:
                print("余额和信用额度必须是数字!")
                continue
            Name = input("Name:")
            Password = input("Password:")
            print("新增信用卡用户信息为:
    "
                  "User_id:%s
    "
                  "Balance:%s
    "
                  "Credit:%s
    "
                  "Name:%s
    "
                  "Password:%s
    "
                  %(user_id, Balance, Credit, Name, Password))
            choice = input("提交请按1,取消请按2,退出请按q:")
            if choice == '1':
                back_up_file()
                user_data=get_user_data()
                user_data[user_id] = {"Balance": Balance, "Credit": Credit, "Name": Name, "Password": Password}
                f = open(Base_dir + "data\user_db.txt", 'w+', encoding='utf-8')
                json.dump(user_data, f)
                f.close()
                print("新增用户成功!")
                time.sleep(1)
                Exit_flag=False
            elif choice == '2':
                continue
            elif choice == 'q' or choice == 'Q':
                time.sleep(1)
                Exit_flag = False
            else:
                print('Invaliable Options!')
    #定义删除信用卡函数
    def del_user():
        Exit_flag = True
        while Exit_flag:
            user_id=input("请输入要删除的信用卡的卡号:")
            if user_id == 'q' or user_id == 'Q':
                print('欢迎再次使用,再见!')
                time.sleep(1)
                Exit_flag=False
            else:
                user_data=get_user_data()
                print("新增信用卡用户信息为:
    "
                      "User_id:%s
    "
                      "Balance:%s
    "
                      "Credit:%s
    "
                      "Name:%s
    "
                      % (user_id, user_data[user_id]['Balance'], user_data[user_id]['Credit'], user_data[user_id]['Name']))
                choice = input("提交请按1,取消请按2,退出请按q:")
                if choice == '1':
                    back_up_file()
                    user_data.pop(user_id)
                    f = open(Base_dir + "data\user_db.txt", 'w+',encoding='utf-8')
                    json.dump(user_data, f)
                    f.close()
                    print("删除用户成功!")
                    time.sleep(1)
                    Exit_flag = False
                elif choice == '2':
                    continue
                elif choice == 'q' or choice == 'Q':
                    print('欢迎再次使用,再见!')
                    time.sleep(1)
                    Exit_flag = False
                else:
                    print('Invaliable Options!')
    

    3、用户数据文件:

    {"003": {"Name": "wangwu", "Password": "qazwsx", "Credit": 16000, "Balance": 8000}, "004": {"Name": "zhaoliu", "Password": "edcrfv", "Credit": 18000, "Balance": 6000}, "002": {"Name": "lisi", "Password": "123456", "Credit": 14000, "Balance": 10000}, "009": {"Password": "qwerty", "Name": "hanmeimei", "Credit": 15000, "Balance": 15000}, "005": {"Name": "fengqi", "Password": "1234qwer", "Credit": 15000, "Balance": 10700}, "010": {"Name": "lilei", "Password": "qaswed", "Credit": 50000, "Balance": 50000}, "008": {"Name": "zhengshi", "Password": "123456", "Credit": 12345, "Balance": 12345}, "006": {"Name": "zhouba", "Password": "123456", "Credit": 20000, "Balance": 8300}, "001": {"Name": "zhangsan", "Password": "abcd1234", "Credit": 12000, "Balance": 12000}, "007": {"Name": "wujiu", "Password": "123456", "Credit": 20000, "Balance": 11243}}
    

    4、相关日志内容:

    登录日志:

    2016-12-20  22:12:18 卡号 005 认证成功!
    2016-12-20 22:14:20 卡号 005 认证成功!
    2016-12-20 22:17:26 卡号 006 认证成功!
    2016-12-20 22:18:06 卡号 005 认证成功!
    2016-12-20 22:18:06 卡号 006 认证成功!
    2016-12-20 22:21:10 卡号 005 认证失败!
    2016-12-20 22:21:10 卡号 006 认证成功!
    2016-12-20 22:23:17 卡号 006 认证成功!
    2016-12-20 22:25:33 卡号 006 认证成功!
    2016-12-20 22:26:14 卡号 006 认证成功!
    2016-12-20 22:32:15 卡号 006 认证成功!
    2016-12-20 22:44:57 卡号 005 认证成功!
    2016-12-20 22:45:50 卡号 006 认证成功!
    2016-12-20 22:47:10 卡号 006 认证成功!
    2016-12-20 22:48:27 卡号 006 认证成功!
    2016-12-20 22:49:30 卡号 006 认证成功!
    2016-12-20 22:52:13 卡号 006 认证成功!
    2016-12-20 22:53:44 卡号 006 认证成功!

    交易日志:

    2016-12-20  21:25:35 卡号 006 发起 repayment 业务,金额为: 100
    2016-12-20 21:27:01 卡号 005 发起 repayment 业务,金额为: 100
    2016-12-20 22:14:20 卡号 005 发起 repayment 业务,金额为: 100
    2016-12-20 22:17:26 卡号 006 发起 transfer 业务,金额为: 300
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  • 原文地址:https://www.cnblogs.com/pythonstudy/p/6204752.html
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