如何使用Python3编写信用卡管理程序？
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
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路饭网站的支持！
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