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！\n"

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+'\logs\log.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!\n' % 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 \n' % 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!\n' % 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！\n' % 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:\n"

              "1、查询信用额度。\n"

              "2、信用卡还款。\n"

              "3、信用卡提现。\n"

              "4、修改口令。\n"

              "5、信用卡转账。\n"

              "6、信用卡账单查询。\n"

              "7、轻松购物。\n"

              "8、退出请按q!\n")

        service_items = input('-->')

    elif choice == '1':

        print("请选择服务类别:\n"

              "a、修改用户信用额度。\n"

              "b、新增信用卡用户。\n"

              "c、删除信用卡用户。\n"

              "d、修改用户口令。\n"

              "e、退出请按q!\n")

        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\n"

          %(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.\n" %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.\n" % (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：\n")

    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：\n")

        if target_user_id in user_data.keys():

            while Exit_flag:

                new_credit=input("请输入新的信用额度：\n")

                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：\n")

                    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：\n"

              "User_id:%s\n"

              "Balance:%s\n"

              "Credit:%s\n"

              "Name:%s\n"

              "Password:%s\n"

              %(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：\n"

                  "User_id:%s\n"

                  "Balance:%s\n"

                  "Credit:%s\n"

                  "Name:%s\n"

                  % (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

巴特西

python3 实现简单信用卡管理程序

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