使用Python3编写简单信用卡管理程序

#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

#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!')

{"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}}