1、程序執行代碼：

#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="歡迎使用銀行信用卡自助服務系統！/n"for i in str:  sys.stdout.write(i)  sys.stdout.flush()  time.sleep(0.3)while True:  print("1、管理人員入口。")  time.sleep(0.3)  print("2、用戶登錄入口。")  print("3、退出請按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("該功能正在建設中，更多精彩，敬請期待！")    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("歡迎再次使用，再見！")      Exit_flag = False

2、程序功能函數：

#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)#定義認證裝飾器def auth(func):  def wrapper(*args,**kwargs):    # print("請輸入卡號和密碼進行驗證！")    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('請輸入您的卡號:')      user_pwd = input('請輸入您的密碼:')      if user_id in user_data:        if user_pwd == user_data[user_id]['Password']:          Log_file.write(start_time + ' 卡號 %s 認證成功!/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 + ' 卡號 '+ user_id + ' 發起 ' + func_name + ' 業務，金額為： %s /n' % keywords)            Bill_log_file.flush()            time.sleep(1)            Bill_log_file.close            return keywords          else:            return keywords        else:          print('卡號或密碼錯誤！請重新輸入！')          Log_file.write(start_time + ' 卡號 %s 認證失敗!/n' % user_id)          Log_file.flush()          time.sleep(1)          Log_file.close          count +=1      else:        print("卡號不存在，請確認！")      if count == 3:        print("對不起,您已輸錯3三次，卡號已鎖定！")        Log_file.write(start_time + ' 卡號 %s 因連續三次驗證失敗而被鎖定！/n' % user_id)        time.sleep(1)        Log_file.close  return wrapper#定義菜單函數，根據不同用戶顯示不通菜單。def menu(choice):  if choice == '2':    print( "請選擇服務類別:/n"       "1、查詢信用額度。/n"       "2、信用卡還款。/n"       "3、信用卡提現。/n"       "4、修改口令。/n"       "5、信用卡轉賬。/n"       "6、信用卡賬單查詢。/n"       "7、輕松購物。/n"       "8、退出請按q!/n")    service_items = input('-->')  elif choice == '1':    print("請選擇服務類別:/n"       "a、修改用戶信用額度。/n"       "b、新增信用卡用戶。/n"       "c、刪除信用卡用戶。/n"       "d、修改用戶口令。/n"       "e、退出請按q!/n")    service_items = input('-->')  else:    print("感謝使用，祝生活愉快！")    exit()  return service_items# 定義備份用戶數據文件函數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")#定義獲取用戶數據信息函數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#定義用戶數據變量user_data = get_user_data()#定義查詢信用額度函數@authdef get_user_credit():  user_credit=user_data[user_id]['Credit']  print("您目前的信用額度為：%s元/n"     %(user_credit))  time.sleep(2)  return user_credit#定義信用卡還款函數@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("您目前需要還款金額為：%s元./n" %user_bill)  Exit_flag=True  while Exit_flag:    repayment_value=input("請輸入還款金額：")    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，還款成功！")      print("您目前需要還款金額為：%s元./n" % (user_data[user_id]['Credit'] - user_data[user_id]['Balance']))      time.sleep(1)      Exit_flag = False      return repayment_value    else:      print("請輸入正確的金額！")#定義信用卡提現函數@authdef enchashment():  user_credit=user_data[user_id]['Credit']  print("你可用的取現額度為：%s" %user_credit)  Exit_flag=True  while Exit_flag:    enchashment_value=input("請輸入您要取現的金額：")    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("取現成功，您目前的可用額度為：%s" %user_data[user_id]['Balance'])          time.sleep(1)          Exit_flag = False          return enchashment_value        else:          print("您的取現額度必須小于或等于您的信用額度！")      else:        print("取現金額必須為100的整數倍！")    else:      print("輸入有誤，取現金額必須為數字，且為100的整數倍")@auth#定義信用卡轉賬函數def transfer():  user_balance=user_data[user_id]['Balance']  print("您目前的可用額度為：%s" %user_balance)  Exit_flag=True  while Exit_flag:    transfer_user_id = input("請輸入對方帳號：")    transfer_value = input("請輸入轉賬金額：")    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("請輸入口令以驗證身份：")            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("轉賬成功，您目前的可用額度為：%s" % user_balance)              time.sleep(1)              Exit_flag = False              return transfer_value            else:              print("密碼錯誤，請重新輸入！")        else:          print("轉賬金額，必須為數字，請確認！")    else:      print("帳號不存在，請確認！")# @auth#定義信用卡賬單查詢函數@authdef billing_query():  print("我們目前僅提供查詢所有賬單功能！")  print("您的賬單為：/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) #定義修改信用卡額度函數def change_user_credit():  print("您正在修改用戶的信用額度！")  Exit_flag=True  while Exit_flag:    target_user_id=input("請輸入您要修改的用戶卡號：/n")    if target_user_id in user_data.keys():      while Exit_flag:        new_credit=input("請輸入新的信用額度：/n")        if new_credit.isdigit():          new_credit= int(new_credit)          user_data[target_user_id]['Credit']=new_credit          print("卡號 %s 的新信用額度為：%s " %(target_user_id,new_credit))          choice = input("確認請輸入1或者按任意鍵取消：/n")          if choice == '1':            f = open(Base_dir + "/data//user_db.txt", 'r+', encoding='utf-8')            json.dump(user_data, f)            f.close()            print("信用額度修改成功，新額度已生效！")            print("卡號 %s 的新信用額度為：%s " % (target_user_id, user_data[target_user_id]['Credit']))            time.sleep(1)            Exit_flag = False          else:            print("用戶的信用額度未發生改變！")        else:          print("信用額度必須為數字！請確認！")    else:      print("卡號不存在，請確認！")#定義修改口令函數@authdef change_pwd():  print("注意：正在修改用戶密碼！")  Exit_flag = True  while Exit_flag:    old_pwd = input("請輸入當前密碼：")    if old_pwd == get_user_data()[user_id]["Password"]:      new_pwd = input("請輸入新密碼：")      new_ack = input("請再次輸入新密碼：")      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，密碼修改成功！")        time.sleep(1)        Exit_flag = False      else:        print("兩次密碼不一致，請確認！")    else:      print("您輸入的密碼不正確，請在確認！")#定義新增信用卡函數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("余額和信用額度必須是數字！")      continue    Name = input("Name:")    Password = input("Password:")    print("新增信用卡用戶信息為：/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("提交請按1，取消請按2,退出請按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("新增用戶成功！")      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!')#定義刪除信用卡函數def del_user():  Exit_flag = True  while Exit_flag:    user_id=input("請輸入要刪除的信用卡的卡號：")    if user_id == 'q' or user_id == 'Q':      print('歡迎再次使用，再見！')      time.sleep(1)      Exit_flag=False    else:      user_data=get_user_data()      print("新增信用卡用戶信息為：/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("提交請按1，取消請按2,退出請按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("刪除用戶成功！")        time.sleep(1)        Exit_flag = False      elif choice == '2':        continue      elif choice == 'q' or choice == 'Q':        print('歡迎再次使用，再見！')        time.sleep(1)        Exit_flag = False      else:        print('Invaliable Options!')