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Use Python3 to write a simple credit card management program

高洛峰

Feb 23, 2017 pm 04:43 PM

这篇文章主要介绍了使用Python3 编写简单信用卡管理程序的代码，非常不错，具有参考借鉴价值，需要的朋友参考下吧

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 == &#39;1&#39;:
      main.get_user_credit()
    elif user_choice == &#39;2&#39;:
      main.repayment()
    elif user_choice == &#39;3&#39;:
      main.enchashment()
    elif user_choice == &#39;4&#39;:
      main.change_pwd()
    elif user_choice == &#39;5&#39;:
      main.transfer()
    elif user_choice == &#39;6&#39;:
      main.billing_query()
    elif user_choice == &#39;7&#39;:
      print("该功能正在建设中，更多精彩，敬请期待！")
    elif user_choice == &#39;a&#39;:
      main.change_user_credit()
    elif user_choice == &#39;b&#39;:
      main.add_user()
    elif user_choice == &#39;c&#39;:
      main.del_user()
    elif user_choice == &#39;d&#39;:
      main.change_pwd()
    elif user_choice == &#39;q&#39; or user_choice == &#39;Q&#39;:
      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+&#39;\data\\user_db.txt&#39;, &#39;r&#39;)
    Log_file = open(Base_dir+&#39;\logs\log.txt&#39;, &#39;a+&#39;, encoding=&#39;utf-8&#39;)
    Bill_log_file = open(Base_dir + &#39;\logs\\bill_log.txt&#39;, &#39;a+&#39;, encoding=&#39;utf-8&#39;)
    func_name = func.__name__
    Time_formate = &#39;%Y-%m-%d %X&#39;
    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(&#39;请输入您的卡号:&#39;)
      user_pwd = input(&#39;请输入您的密码:&#39;)
      if user_id in user_data:
        if user_pwd == user_data[user_id][&#39;Password&#39;]:
          Log_file.write(start_time + &#39; 卡号 %s 认证成功!\n&#39; % user_id)
          Log_file.flush()
          time.sleep(1)
          Log_file.close
          keywords = func(*args, **kwargs)
          if func_name == &#39;repayment&#39; or func_name == &#39;transfer&#39; or func_name == &#39;enchashment&#39;:
            Bill_log_file.write(start_time + &#39; 卡号 &#39;+ user_id + &#39; 发起 &#39; + func_name + &#39; 业务，金额为： %s \n&#39; % keywords)
            Bill_log_file.flush()
            time.sleep(1)
            Bill_log_file.close
            return keywords
          else:
            return keywords
        else:
          print(&#39;卡号或密码错误！请重新输入！&#39;)
          Log_file.write(start_time + &#39; 卡号 %s 认证失败!\n&#39; % 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 + &#39; 卡号 %s 因连续三次验证失败而被锁定！\n&#39; % 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 == &#39;2&#39;:
    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(&#39;-->&#39;)
  elif choice == &#39;1&#39;:
    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(&#39;-->&#39;)
  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 = &#39;%Y-%m-%d&#39;
  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", &#39;r+&#39;,encoding=&#39;utf-8&#39;) 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][&#39;Credit&#39;]
  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][&#39;Credit&#39;])
  user_balance=int(user_data[user_id][&#39;Balance&#39;])
  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][&#39;Balance&#39;] = user_data[user_id][&#39;Balance&#39;] + repayment_value
      f = open(Base_dir + "\data\\user_db.txt", &#39;r+&#39;, encoding=&#39;utf-8&#39;)
      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][&#39;Credit&#39;] - user_data[user_id][&#39;Balance&#39;]))
      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][&#39;Credit&#39;]
  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][&#39;Balance&#39;] = user_credit - enchashment_value
          f = open(Base_dir + "\data\\user_db.txt", &#39;r+&#39;, encoding=&#39;utf-8&#39;)
          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][&#39;Balance&#39;])
          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][&#39;Balance&#39;]
  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][&#39;Password&#39;]:
              user_balance = user_balance- transfer_value
              user_data[transfer_user_id][&#39;Balance&#39;]=int(user_data[transfer_user_id][&#39;Balance&#39;]) + transfer_value
              f = open(Base_dir + "\data\\user_db.txt", &#39;r+&#39;, encoding=&#39;utf-8&#39;)
              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 + &#39;\logs\\bill_log.txt&#39;, &#39;r&#39;, encoding=&#39;utf-8&#39;)
  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][&#39;Credit&#39;]=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 == &#39;1&#39;:
            f = open(Base_dir + "\data\\user_db.txt", &#39;r+&#39;, encoding=&#39;utf-8&#39;)
            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][&#39;Credit&#39;]))
            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", &#39;r+&#39;, encoding=&#39;utf-8&#39;)
        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 == &#39;1&#39;:
      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", &#39;w+&#39;, encoding=&#39;utf-8&#39;)
      json.dump(user_data, f)
      f.close()
      print("新增用户成功！")
      time.sleep(1)
      Exit_flag=False
    elif choice == &#39;2&#39;:
      continue
    elif choice == &#39;q&#39; or choice == &#39;Q&#39;:
      time.sleep(1)
      Exit_flag = False
    else:
      print(&#39;Invaliable Options!&#39;)
#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 == &#39;q&#39; or user_id == &#39;Q&#39;:
      print(&#39;欢迎再次使用，再见！&#39;)
      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][&#39;Balance&#39;], user_data[user_id][&#39;Credit&#39;], user_data[user_id][&#39;Name&#39;]))
      choice = input("提交请按1，取消请按2,退出请按q：")
      if choice == &#39;1&#39;:
        back_up_file()
        user_data.pop(user_id)
        f = open(Base_dir + "\data\\user_db.txt", &#39;w+&#39;,encoding=&#39;utf-8&#39;)
        json.dump(user_data, f)
        f.close()
        print("删除用户成功！")
        time.sleep(1)
        Exit_flag = False
      elif choice == &#39;2&#39;:
        continue
      elif choice == &#39;q&#39; or choice == &#39;Q&#39;:
        print(&#39;欢迎再次使用，再见！&#39;)
        time.sleep(1)
        Exit_flag = False
      else:
        print(&#39;Invaliable Options!&#39;)

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

以上所述是小编给大家介绍的使用Python3 编写简单信用卡管理程序，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对PHP中文网的支持！

更多使用Python3 编写简单信用卡管理程序相关文章请关注PHP中文网！

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SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

SublimeText3 Linux new version

SublimeText3 Linux latest version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

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