一、简单说明
1、源代码文件见附件 Credit.zip
2、关于转账功能，因时间问题，转账功能待续
4、逻辑图
二、代码
１、包encryption中的（password.py文件）
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Created on Thu Nov 10 14:47:29 2016
密码相关功能
@author: toby
"""
import hashlib, re
#密码进行MD5加密
def md5(passwd):
hashs = hashlib.md5() #创建MD5对象
hashs.update(passwd) #生成加密串
return hashs.hexdigest() #获取加密串
#密码位数检测，只能是6位数字
def check_digit(passwd):
com = re.compile(‘^\d{6,6}$‘)
temps = com.findall(passwd)
if len(temps) == 0:
return False
else:
return True
#检测银行卡号位数
def check_card(card):
com = re.compile(‘^\d{16,16}$‘)
temps = com.findall(card)
if len(temps) == 0:
return False
else:
return True２、applys.py
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Created on Thu Nov 10 14:42:29 2016
卡号申请程序
@author: toby
"""
from encryption import password
import shelve, random, getpass, time
#申请资格评估
def ssessment(income,age):
if income >= 3000 and age >= 22 and age < 60:
return True
else:
return False
#确定额度
def quota(money):
if money > 3000 and money < 6000:
return 5000
if money > 6000 and money < 10000:
return 10000
if money > 10000 and money < 20000:
return 15000
#生成卡号
def carid():
carid = ""
for i in range(16):
temp = random.randint(0,9)
carid += str(temp)
return carid
#新申请的用户数据入库
def examine(key,val):
data = shelve.open(‘data.db‘)
data[key] = val
if __name__ == "__main__":
print ‘‘‘
信用卡申请资格评估
‘‘‘
income = input(‘月收入：‘)
age = input(‘年龄：‘)
#评估申请资格
if ssessment(income,age) == False:
print ‘评估结果：无申请资格‘
else:
print ‘‘‘
评估结果：可申请
请填写详细资料
‘‘‘
name = raw_input(‘姓名：‘)
card = raw_input(‘身份证：‘)
phone = raw_input(‘手机：‘)
address = raw_input(‘地址：‘)
#根据条件自动生成固定额度
fixed_amount = quota(income) #调用自动生成额度函数
#初次申请卡号，初始记录还款的key为0
repayment_amount = 0 #初始化还款金额，首次为0元
#自动生成卡号
kaid = carid() #调用自动生成16位卡号函数
while True:
passwd1 = getpass.getpass(‘设置密码：‘)
passwd2 = getpass.getpass(‘确认密码：‘)
if passwd1 != passwd2:
print ‘密码不一致‘
continue
if password.check_digit(passwd1) == False: #检测密码合法性
print ‘只能输入6位数字密码‘
continue
else:
print ‘------卡号申请成功！------‘
print ‘卡号为： %s‘ % kaid
print ‘可用额度： %s‘ % fixed_amount
date = time.strftime(‘%Y-%m-%d %H:%M:%S‘) #记录申请时间
repayment_time = time.strftime(‘%Y-%m-%d‘) #申请通过当天日期为还款日
passwd_data = password.md5(passwd1) #密码使用MD5加密
temp = {‘date‘:date,‘name‘:name,‘age‘:age,‘income‘:income,‘card‘:card,‘phone‘:phone,‘address‘:address,‘passwd‘:passwd_data,‘fixed_amount‘:fixed_amount,‘temp_money‘:int(fixed_amount),‘repayment_amount‘:repayment_amount,‘repayment_time‘:repayment_time}
examine(kaid,temp) #调用数据入库函数进行将新申请的数据存入模拟数据库
break3、login.py
# -*- coding: utf-8 -*- """ Created on Fri Nov 11 21:35:04 2016 模拟取款机登录入口程序 @author: toby """ from encryption import password import getpass from data_function import * if __name__ == "__main__": try: while True: print ‘‘‘ ------银行系统登录入口------ ‘‘‘ card_number = raw_input(‘卡号：‘) card_password = getpass.getpass(‘口令：‘) if password.check_card(card_number) == False: print ‘卡号位数不正确，请仔细输入‘ continue if check_card_active(card_number) == False: print ‘对不起，该卡号不存在‘ continue if password.check_digit(card_password) == False: print ‘密码无效‘ continue passwd_md5 = password.md5(card_password) #将输入的密码进行加密，用于和数据库中的md5密码匹配 db_passwd = get_data(card_number,‘passwd‘) #从数据库读取对应卡号的密码 if passwd_md5 != db_passwd: #输入的密码进行加密后和从数据库中读取的MD5密码串进行配对 print ‘密码错误‘ continue else: while True: print ‘‘‘ XX银行欢迎您 1 ----------------- 取现 2 ----------------- 查询 3 ----------------- 还款 4 ----------------- 转账 5 ----------------- 退出 ‘‘‘ main_menu = input(‘选择您需要的操作（1-5）：‘) if main_menu == 1: cash_amount = input(‘取款金额：‘) print ‘‘‘ 温馨提示：信用卡取现需收取5%手续费 ‘‘‘ action = raw_input(‘是否继续套现(y/n):‘) if action == ‘y‘: if cash_debit(card_number,int(cash_amount)): #调用套现接口 print ‘请提取现金‘ continue else: print ‘机器故障，无法提取‘ break if action == ‘no‘: continue if main_menu == 2: print ‘‘‘ 1 ----------------- 查询余额 2 ----------------- 查询明细 ‘‘‘ sub_menu = input(‘选择您需要的操作（1-2）:‘) if sub_menu == 1: get_all_data(card_number) action = raw_input(‘是否返回主菜单(y):‘) if action == ‘y‘: continue if sub_menu == 2: get_water(card_number) #调用查询流水函数 action = raw_input(‘是否返回主菜单(y):‘) if action == ‘y‘: continue if main_menu == 3: temp_money = get_data(card_number,‘temp_money‘) #读取可用金额 repayment_amount = get_data(card_number,‘repayment_amount‘) #读取需还款金额 print ‘‘‘ 可用余额: %s (人民币) 您需还款: %s (人民币) ‘‘‘ % (temp_money,repayment_amount) money = input(‘还款金额:‘) if repayment_interface(card_number,int(money)) == True: print ‘还款成功‘ else: print ‘还款失败‘ action = raw_input(‘是否返回主菜单(y):‘) if action == ‘y‘: continue if main_menu == 4: print ‘转账功能正在开发‘ action = raw_input(‘是否返回主菜单(y):‘) if action == ‘y‘: continue if main_menu == 5: print ‘柜员机系统已退出‘ break continue except Exception,e: print Exception,":::-->",e
４、data_function.py
# -*- coding: utf-8 -*- """ Created on Fri Nov 11 16:10:05 2016 数据操作相关功能 #我的卡号：1098521606032848 @author: toby """ from encryption import password import shelve, getpass, time #数据库读取操作，这是一个全局动作 f = shelve.open(‘data.db‘) #检测卡号是否存在 def check_card_active(card_number): if f.get(card_number,None) != None: #判断对应卡号是否存在 return True else: return False #检测对应卡号中对应的关键字数据，例如检测对应卡号密码 def get_data(card,keys): data = f[card] return data[keys] #查询对应卡号的所有数据 def get_all_data(card): data = f[card] print ‘‘‘ 卡号: %s 户名: %s 固定额度: %s (人民币) 可用余额: %s (人民币) 需还款: %s (人民币) 还款日: %s ‘‘‘% (card,data[‘name‘],data[‘fixed_amount‘],data[‘temp_money‘],data[‘repayment_amount‘],data[‘repayment_time‘]) #扣款通用接口，正常POS机消费或者网银支付 ，无需手续费 def pos_smart_pay(card_number,card_password,price): if check_card_active(card_number) == False: print ‘对不起，卡号有误！‘ return False passwd_md5 = password.md5(card_password) #将输入的密码进行加密，用于和数据库中的md5密码匹配 db_passwd = get_data(card_number,‘passwd‘) #从数据库读取对应卡号的密码 if passwd_md5 != db_passwd: print ‘支付密码错误‘ return False else: data = f[card_number] #读取对应卡号信息 existing = data[‘temp_money‘] #读取现有金额 if price > existing: print ‘对不起，余额不足‘ else: result = existing - price #现有金额减去正常消费价格 data[‘temp_money‘] = int(result) #临时存储计算结果 f[card_number] = data #计算结果数据入库 current_repayment_amoount = data[‘repayment_amount‘] #读取现有还款金额 res = current_repayment_amoount + price #现有还款金额 + 当前消费金额 = 需还款的金额 data[‘repayment_amount‘] = int(res) f[card_number] = data #需还款金额数据入库 action = "POS消费" record_water(card_number,action,price) f.close() return True #取款机取款功能 需5%手续费 def cash_debit(card_number,money): data = f[card_number] #读取对应卡号信息 existing = data[‘temp_money‘] #读取现有可用金额 if money > existing: print ‘‘‘ 对不起，余额不足，无法套现 您当前可用金额: %s ‘‘‘ % existing else: repayment = money * 0.05 #套现时计算手续费 print ‘‘‘ 取款金额: %s 手续费: %s ‘‘‘ % (money, repayment) result = existing - money - repayment #现有金额-套现金额(再减去手续费) data[‘temp_money‘] = int(result) #临时存储计算结果 f[card_number] = data #计算结果数据入库 current_repayment_amoount = data[‘repayment_amount‘] #读取现有还款金额 temporary = current_repayment_amoount + money + (money * 0.05) #现有还款金额 + 当前套现金额+手续费 data[‘repayment_amount‘] = int(temporary) f[card_number] = data #需还款金额数据入库 #调用记录流水的函数进行记录流水 action = "取款机套现" record_water(card_number,action,money) f.close() return True #通用还款接口 def repayment_interface(card_number,money): try: data = f[card_number] current_repayment_amoount = data[‘repayment_amount‘] #读取需还款金额 data[‘repayment_amount‘] = current_repayment_amoount - money #需还款金额 - 传入进来的还款额 = 剩余还款额（全部还清后这里为0元，还多少减多少） f[card_number] = data #剩余还款额数据入库 existing = data[‘temp_money‘] #读取现有可用金额 data[‘temp_money‘] = existing + money #现有可用金额 + 已传入进来的需还金额 （累加到可用金额，还多少就会累加多少） f[card_number] = data #还款后累加可用后的金额数据入库 action = "还款" record_water(card_number,action,money) f.close() return True except Exception,e: print Exception,":::-->",e #通用记录流水接口 def record_water(card_number,action,money): water = shelve.open(‘water_data/%s.list‘ % card_number) date = time.strftime(‘%Y-%m-%d %H:%M:%S‘) water[date] = "行为：%s, 金额：%s" % (action,money) water.close() #通用查询流水接口 def get_water(card_number): water = shelve.open(‘water_data/%s.list‘ % card_number) for val in water: print val, water[val]
５、payment_interface.py
# -*- coding: utf-8 -*- """ Created on Sat Nov 12 13:47:03 2016 模拟第三方支付 @author: toby """ import getpass from data_function import * #第三方支付接口 while True: payment_card = raw_input(‘支付卡号:‘) payment_price = input(‘价格:‘) payment_password = getpass.getpass(‘支付密码:‘) if pos_smart_pay(payment_card,payment_password,int(payment_price)) == True: print ‘支付完成‘ break else: print ‘支付失败‘ continue
本文出自 “FA&IT运维-Q群:223843163” 博客，请务必保留此出处http://freshair.blog.51cto.com/8272891/1872529
python 之简单模拟银行系统功能（卡号申请、还款、支付、取现）
原文：http://freshair.blog.51cto.com/8272891/1872529