使用Python3 编写简单信用卡管理程序

#Author by Andy#_*_ coding:utf-8 _*_import os,sys,timeBase_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

#Author by Andy#_*_ coding:utf-8 _*import json,sys,os,time,shutilBase_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@authdef 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@authdef 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@authdef 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@authdef 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@authdef 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!')

{"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}}