本文实例讲述了python实现的银行系统模拟程序。分享给大家供大家参考,具体如下:
银行系统模拟程序
1、概述
使用面向对象思想模拟一个简单的银行系统,具备的功能:管理员登录/注销、用户开户、登录、找回密码、挂失、改密、查询、存取款、转账等功能。
编程语言:python。
2、目的
通过这个编程练习,可以熟悉运用面向对象的思想来解决实际问题,其中用到的知识点有类的封装、正则表达式、模块等。
3、体会
在编写这个程序时,实际上的业务逻辑还是要考虑的,比如修改密码时需要输入手机号、身份证号等。在进行类的封装时,实际上还是用面向过程的思想把一些基本的业务逻辑编写成函数,对一些重复使用的代码也可以封装成函数(就是自己造适合这个业务的轮子,实际开发中很多底层的函数是不用自己再次去实现的,可以直接调用),这些都是一些底层的封装,然后在实现主要业务时上就可以调用类中的方法实现,这时只需关注业务逻辑就好了。
使用面向对象的思想进行编程,考虑的点是:实现一个功能,有哪些方法可以让我进行调用(指挥者)。
使用面向过程的思想进行编程,考虑的点是:实现一个功能,我需要实现哪些方法(执行者)。
编写这个程序还用到一个很重要的概念,就是对程序进行模块化。模块化的好处是可以更好的对程序进行维护,条理也更清晰。
4、代码
源码github地址:https://github.com/liangdongchang/pybanksystem.git
1、banksystem.py文件
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from view import view from atm import atm from person import person def func(view,atm,per): view.funcinterface() choice = input ( "请选择您要办理的业务:" ) if choice = = '1' : return per.checkmoney(atm) elif choice = = '2' : return per.savemoney(atm) elif choice = = '3' : return per.getmoney(atm) elif choice = = '4' : return per.transfermoney(atm) elif choice = = '5' : return per.changepassword(atm) elif choice = = '6' : return per.unlockaccount(atm) elif choice = = '7' : return per.closeaccount(atm) elif choice = = 't' : if per.exit(atm): return true else : print ( "输入有误!" ) def main(): # 管理员登录名为'admin',密码为'123' view = view( "admin" , '123' ) view.initface() atm = atm() view.login() per = person() while true: view.funcinit() choice = input ( "请选择您要办理的业务:" ) if choice = = '1' : per.newaccount(atm) elif choice = = '2' : if per.login(atm): while true: if func(view,atm,per) = = none: continue else : break elif choice = = '3' : per.findbackpassword(atm) elif choice = = '4' : per.lockaccount(atm) elif choice = = 't' : if per.exit(atm): # 管理员注销系统 if view.logout(): return true else : print ( "输入有误!" ) if __name__ = = '__main__' : main() |
2、card.py文件:
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''' 卡: 类名:card 属性:卡号【6位随机】 密码 余额 绑定的身份证号 手机号 ''' class card( object ): def __init__( self , cardid, password, money,identityid,phonenum,cardlock = 'false' ): self .cardid = cardid self .password = password self .money = money self .identityid = identityid self .phonenum = phonenum self .cardlock = cardlock |
3、readappendcard.py文件:
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''' 功能:读取文件cardinfo.txt的信息 方法:读、写、删 ''' from card import card import json # 读 class readcard(card): def __init__( self , cardid = ' ', password=' ', money=0, identityid=' ', phonenum=' ', cardlock=' '): card.__init__( self , cardid, password, money, identityid, phonenum, cardlock) def dict2card( self , d): return self .__class__(d[ "cardid" ], d[ "password" ], d[ "money" ],d[ "identityid" ],d[ "phonenum" ], d[ "cardlock" ]) def read( self ): # card对象转为字典 with open ( "cardinfo.txt" , "r" ,encoding = "utf-8" ) as fr: cards = [] for re in fr.readlines(): cards.append( self .dict2card( eval (re))) return cards # 写 class appendcard(card): def __init__( self ): card.__init__( self , cardid = ' ', password = ' ', money = 0, identityid = ' ', phonenum = ' ', cardlock=' ') def card2dict( self ,card): return { "cardid" : card.cardid, "password" : card.password, "money" : card.money, "identityid" : card.identityid, "phonenum" : card.phonenum, "cardlock" : card.cardlock } def append( self ,card,w = 'a' ): # 默认是追加,如果w='w'就清空文件 if w = = 'w' : with open ( "cardinfo.txt" , "w" , encoding = "utf-8" ) as fa: fa.write('') else : with open ( "cardinfo.txt" , "a" , encoding = "utf-8" ) as fa: json.dump(card, fa, default = self .card2dict) fa.write( '\n' ) # 删 class del ( object ): def del_( self ,cardid): readcard = readcard() cards = readcard.read() for card in cards: # 删除输入的卡号 if cardid = = card.cardid: cards.remove(card) break else : print ( "卡号不存在!" ) return false # 重新写入文件 appendcard = appendcard() appendcard.append(' ',w=' w') for card in cards: appendcard.append(card) return true |
4、person.py
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''' 人 类名:person 行为:开户、查询、取款、存储、转账、改密、销户、退出 ''' class person( object ): def __init__( self ,name = ' ',identity=' ',phonenum=' ',card = none): self .name = name self .identity = identity self .phonenum = phonenum self .card = card # 登录 def login( self ,atm): card = atm.login() if card: self .card = card return true else : return false # 开户 def newaccount( self ,atm): return atm.newaccount() #找回密码 def findbackpassword( self ,atm): return atm.findbackpassword() # 查询余额 def checkmoney( self , atm): return atm.checkmoney( self .card) # 存钱 def savemoney( self , atm): return atm.savemoney( self .card) # 取钱 def getmoney( self , atm): return atm.getmoney( self .card) # 转账 def transfermoney( self , atm): return atm.transfermoney( self .card) # 销户 def closeaccount( self , atm): return atm.closeaccount( self .card) # 挂失 def lockaccount( self , atm): return atm.lockaccount() # 解锁 def unlockaccount( self , atm): return atm.unlockaccount( self .card) # 改密 def changepassword( self , atm): return atm.changepassword( self .card) # 退出系统 def exit( self , atm): return atm.exit() |
5、view.py
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''' 管理员界面 类名:view 属性:账号,密码 行为:管理员初始化界面 管理员登陆 系统功能界面 管理员注销 系统功能:开户 查询 取款 存储 转账 改密 销户 退出 ''' from check import check import time class view( object ): def __init__( self ,admin,password): self .admin = admin self .password = password # 管理员初始化界面 def initface( self ): print ( "*------------------------------------*" ) print ( "| |" ) print ( "| 管理员界面正在启动,请稍候... |" ) print ( "| |" ) print ( "*------------------------------------*" ) time.sleep( 1 ) return #管理员登录界面 def login( self ): print ( "*------------------------------------*" ) print ( "| |" ) print ( "| 管理员登陆界面 |" ) print ( "| |" ) print ( "*------------------------------------*" ) check = check() check.username( self .admin, self .password) print ( "*-------------登陆成功---------------*" ) print ( " 正在跳转到系统功能界面,请稍候... " ) del check time.sleep( 1 ) return # 管理员注销界面 def logout( self ): print ( "*------------------------------------*" ) print ( "| |" ) print ( "| 管理员注销界面 |" ) print ( "| |" ) print ( "*------------------------------------*" ) #确认是否注销 check = check() if not check.issure( '注销' ): return false check.username( self .admin, self .password) print ( "*-------------注销成功---------------*" ) print ( " 正在关闭系统,请稍候... " ) del check time.sleep( 1 ) return true #系统功能界面 ''' 系统功能:开户,查询,取款,存储,转账,销户,挂失,解锁,改密,退出 ''' def funcinit( self ): print ( "*-------welcome to future bank---------*" ) print ( "| |" ) print ( "| (1)开户 (2)登录 |" ) print ( "| (3)找回密码 (4)挂失 |" ) print ( "| (t)退出 |" ) print ( "| |" ) print ( "*--------------------------------------*" ) def funcinterface( self ): print ( "*-------welcome to future bank---------*" ) print ( "| |" ) print ( "| (1)查询 (5)改密 |" ) print ( "| (2)存款 (6)解锁 |" ) print ( "| (3)取款 (7)销户 |" ) print ( "| (4)转账 (t)退出 |" ) print ( "| |" ) print ( "*--------------------------------------*" ) |
6、atm.py
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''' 提款机: 类名:atm 属性: 行为(被动执行操作):开户,查询,取款,存储,转账,销户,挂失,解锁,改密,退出 ''' from check import check from card import card from readappendcard import readcard,appendcard import random import time class atm( object ): def __init__( self ): # 实例化相关的类 self .check = check() self .readcard = readcard() self .appendcard = appendcard() self .cards = self .readcard.read() # 显示功能界面 def funcshow( self ,ope): if ope ! = "找回密码" : print ( "*-------welcome to future bank-------*" ) print ( "| %s功能界面 |" % ope) print ( "*------------------------------------*" ) else : # 显示找回密码界面 print ( "*-------welcome to future bank-------*" ) print ( "| 找回密码功能界面 |" ) print ( "*------------------------------------*" ) # 卡号输入 def cardinput( self ,ope = ''): while true: cardid = input ( "请输入卡号:" ) password = input ( "请输入密码:" ) card = self .check.iscardandpasswordsure( self .cards, cardid,password) if not card: print ( "卡号或密码输入有误!!!" ) if ope = = 'login' or ope = = 'lock' : return false else : continue else : return card # 登录 def login( self ): self .funcshow( "登录" ) return self .cardinput( 'login' ) #找回密码 def findbackpassword( self ): self .funcshow( "找回密码" ) cardid = input ( "请输入卡号:" ) card = self .check.iscardidexist( self .cards,cardid) if card: if not self .check.iscardinfosure(card, "找回密码" ): return newpassword = self .check.newpasswordinput() index = self .cards.index(card) self .cards[index].password = newpassword self .writecard() print ( "找回密码成功!请重新登录!!!" ) time.sleep( 1 ) return true else : print ( "卡号不存在!!!" ) return true # 开户 def newaccount( self ): self .funcshow( "开户" ) # 输入身份证号和手机号 pnum = self .check.phoneinput() iden = self .check.identifyinput() print ( "正在执行开户程序,请稍候..." ) while true: # 随机生成6位卡号 cardid = str (random.randrange( 100000 , 1000000 )) # 随机生成的卡号存在就继续 if self .check.iscardidexist( self .cards,cardid): continue else : break # 初始化卡号密码,卡里的钱,卡的锁定状态 card = card(cardid, '888888' , 0 , iden, pnum , 'false' ) self .appendcard.append(card) print ( "开户成功,您的卡号为%s,密码为%s,卡余额为%d元!" % (cardid, '888888' , 0 )) print ( "为了账户安全,请及时修改密码!!!" ) # 更新卡号列表 self .cards = self .readcard.read() return true # 查询 def checkmoney( self ,card): self .funcshow( "查询" ) if self .check.iscardlock(card): print ( "查询失败!" ) else : print ( "卡上余额为%d元!" % card.money) time.sleep( 1 ) # 存款 def savemoney( self ,card): self .funcshow( "存款" ) if self .check.iscardlock(card): print ( "存钱失败!" ) else : mon = self .check.moneyinput( "存款" ) # 找到所有卡中对应的卡号,然后对此卡进行存款操作 index = self .cards.index(card) self .cards[index].money + = mon print ( "正在执行存款程序,请稍候..." ) time.sleep( 1 ) self .writecard() print ( "存款成功!卡上余额为%d元!" % self .cards[index].money) time.sleep( 1 ) # 取款 def getmoney( self ,card): self .funcshow( "取款" ) if self .check.iscardlock(card): print ( "取钱失败!" ) else : print ( "卡上余额为%d元!" % card.money) mon = self .check.moneyinput( "取款" ) if mon: if mon > card.money: print ( "余额不足,您当前余额为%d元!" % card.money) time.sleep( 1 ) else : print ( "正在执行取款程序,请稍候..." ) time.sleep( 1 ) # 找到所有卡中对应的卡号,然后对此卡进行存款操作 index = self .cards.index(card) self .cards[index].money - = mon self .writecard() print ( "取款成功!卡上的余额为%d元!" % self .cards[index].money) time.sleep( 1 ) # 转账 def transfermoney( self ,card): self .funcshow( "转账" ) if self .check.iscardlock(card): #如果卡已锁定就不能进行转账操作 print ( "转账失败!" ) return while true: cardid = input ( "请输入对方的账号:" ) if cardid = = card.cardid: print ( "不能给自己转账!!!" ) return cardother = self .check.iscardidexist( self .cards,cardid) #判断对方卡号是否存在 if cardother = = false: print ( "对方账号不存在!!!" ) return else : break while true: print ( "卡上余额为%d元" % card.money) mon = self .check.moneyinput( "转账" ) if not mon: #输入的金额不对就返回 return if mon > card.money: #输入的金额大于卡上余额就返回 print ( "余额不足,卡上余额为%d元!" % card.money) return else : break print ( "正在执行转账程序,请稍候..." ) time.sleep( 1 ) index = self .cards.index(card) # 找到所有卡中对应的卡号,然后对此卡进行转账操作 self .cards[index].money - = mon indexother = self .cards.index(cardother) #找到对卡卡号所处位置 self .cards[indexother].money + = mon self .writecard() print ( "转账成功!卡上余额为%d元!" % self .cards[index].money) time.sleep( 1 ) # 销户 def closeaccount( self ,card): self .funcshow( "销户" ) if not self .check.iscardinfosure(card, "销户" ): return if card.money > 0 : print ( "卡上还有余额,不能进行销户!!!" ) return if self .check.issure( "销户" ): self .cards.remove(card) #移除当前卡号 self .writecard() print ( "销户成功!" ) time.sleep( 1 ) return true # 挂失 def lockaccount( self ): self .funcshow( "挂失" ) card = self .cardinput( 'lock' ) if not card: return if card.cardlock = = "true" : print ( "卡已处于锁定状态!!!" ) return if not self .check.iscardinfosure(card, "挂失" ): return if self .check.issure( "挂失" ): index = self .cards.index(card) #找到所有卡中对应的卡号,然后对此卡进行挂失操作 self .cards[index].cardlock = "true" self .writecard() print ( "挂失成功!" ) time.sleep( 1 ) return true # 解锁 def unlockaccount( self ,card): self .funcshow( "解锁" ) if card.cardlock = = 'false' : print ( "无需解锁,卡处于正常状态!!!" ) return if not self .check.iscardinfosure(card, "解锁" ): return index = self .cards.index(card) self .cards[index].cardlock = "false" self .writecard() print ( "解锁成功!" ) time.sleep( 1 ) return true # 改密 def changepassword( self ,card): self .funcshow( "改密" ) if self .check.iscardlock(card): print ( "卡处于锁定状态,不能进行改密!!!" ) return if not self .check.iscardinfosure(card, "改密" ): return # 输入旧密码 while true: password = input ( "请输入旧密码:" ) if self .check.ispasswordsure(password,card.password): break else : print ( "卡号原密码输入错误!" ) return newpassword = self .check.newpasswordinput() index = self .cards.index(card) #找到所有卡中对应的卡号,然后对此卡进行改密操作 self .cards[index].password = newpassword self .writecard() print ( "改密成功!请重新登录!!!" ) time.sleep( 1 ) return true # 写入文件 def writecard( self ): self .appendcard.append(' ', w=' w') #先清除原文件再重新写入 for card in self .cards: self .appendcard.append(card) # 退出 def exit( self ): if self .check.issure( "退出" ): return true else : return false |
7、check.py
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''' 验证类: 用户名、密码、卡号、身份证、手机号验证 使用正则表达式进行文本搜索 ''' import re class check( object ): def __init__( self ): pass #用户验证 def username( self ,admin,password): self .admin = admin self .password = password while true: admin = input ( "请输入用户名:" ) password = input ( "请输入密码:" ) if admin ! = self .admin or password ! = self .password: print ( "用户名或密码输入有误,请重新输入!!!" ) continue else : return #是否确认某操作 def issure( self ,operate): while true: res = input ( "是否确认%s?【yes/no】" % operate) if res not in [ 'yes' , 'no' ]: print ( "输入有误,请重新输入!!!" ) continue elif res = = 'yes' : return true else : return false # 手机号验证 def phoneinput( self ): # 简单的手机号验证:开头为1且全部为数字,长度为11位 while true: pnum = input ( "请输入您的手机号:" ) res = re.match(r "^1\d{10}$" ,pnum) if not res: print ( "手机号输入有误,请重新输入!!!" ) continue return pnum # 身份证号验证 def identifyinput( self ): # 简单的身份证号验证:6位,只有最后一可以为x,其余必须为数字 while true: iden = input ( "请输入您的身份证号(6位数字):" ) res = re.match(r "\d{5}\d|x$" ,iden) if not res: print ( "身份证号输入有误,请重新输入!!!" ) continue return iden # 卡号是否存在 def iscardidexist( self ,cards,cardid): for card in cards: if cardid = = card.cardid: return card else : return false # 卡号和密码是否一致 def iscardandpasswordsure( self ,cards,cardid,password): card = self .iscardidexist(cards,cardid) if card: if card.password = = password: return card return false # 密码二次确认是否正确 def ispasswordsure( self , newassword,oldpassword): if newassword = = oldpassword: return true else : return false # 卡号完整信息验证 def iscardinfosure( self ,card,ope): phonenum = input ( "请输入手机号:" ) iden = input ( "请输入身份证号:" ) if card.phonenum = = phonenum and card.identityid = = iden: return true print ( "%s失败!!!\n密码、手机号或身份证号与卡中绑定的信息不一致!!!" % ope) return false # 卡号是否锁定 def iscardlock( self ,card): if card.cardlock = = "true" : print ( "此卡已挂失!" ) return true return false # 输入金额验证 def moneyinput( self ,ope): mon = input ( "输入%s金额(100的倍数):" % ope) # 输入的钱必须是100的倍数 if re.match(r "[123456789]\d*[0]{2}$" , mon): return int (mon) print ( "输入有误,%s金额必须是100的倍数!请重新输入!!!" % ope) return false def newpasswordinput( self ): while true: newpassword = input ( "请输入新密码:" ) if not re.match(r "\d{6}$" ,newpassword): print ( "密码必须是6位的纯数字!!!" ) continue newpasswordagain = input ( "请重复输入新密码:" ) if self .ispasswordsure(newpassword, newpasswordagain): break else : print ( "两次输入不一致!" ) continue return newpassword |
希望本文所述对大家python程序设计有所帮助。
原文链接:https://blog.csdn.net/lm_is_dc/article/details/80199278