用python实现简易图书管理系统

用python实现简易图书管理系统

前言

很多图书馆都有自己的图书管理系统，它主要担负的功能有借书和还书，以及图书管理员对图书的操作等。

程序架构

用户登录/注册—>借书/还书/查看图书---->（管理员）添加、修改图书信息

前期准备

txt文件

首先，在任意位置创建一个文件夹，创建以下几个txt文件：

bookISDN,ISDN.txt:存储书籍的ISDN编号
can lend,lended.txt:存储书籍名称
number,usrinfo.txt:存储用户名，密码
point.txt:存储每个账号还能借出的图书本书
per.txt:存储权限文件

代码准备

因为这个程序会涉及到大量的文件读取，所以我们可以用def函数来简化过程：

def open_wf(name,write):#写入txt（覆盖）
  str(write)
  with open(name,"w",encoding="utf-8") as f:
    f.write(write)
    f.close()
  return True
def open_wj(name,write):#写入txt（不覆盖）
  str(write)
  with open(name,"a",encoding="utf-8") as f:
    f.write(write)
    f.close()
  return True
def open_r(name):#读取（仅第一行）
    with open (name,"r",encoding="utf-8") as f:
        data = f.readline()
        f.close()
    return data
def open_r1(name):#全部读取
    with open (name,"r",encoding="utf-8") as f:
        data = f.readlines()
        f.close()
    return data

def now():
    times=time.localtime()
    	now=str(times.tm_hour)+":"+str(times.tm_min)+":"+str(time.tm_sec)
    return now
def msgbox(flag,word):
    if flag=="1":
        print(word)
    elif flag=="2":
        print(word)

代码实现

登陆系统

代码：

def login():
    usrall=open_r1("usrinfo.txt")
    number=open_r1("number.txt")
    #去掉\n
    for a in range(0,len(usrall)):
        usrall[a]=usrall[a].rstrip("\n")
    name=[]
    for b in range(0,len(number)):
        number[b]=number[b].rstrip("\n")
    name=[]
    seenum=0
    
    print('''欢迎来到登录系统
提示：注册系统暂时关闭
*please choose:*
****************
*****1.登录*****
*****2.EMPTY****
****************''')
    cho_0=input("*********choose:")
    go="0"
    if cho_0=="1":
        name_i=input("用户名：")
        number_i=input("密码：")
        if len(usrall)==len(number):
          for c in range(0,len(usrall)):
            if usrall[c]==name_i and number[c]==number_i:
              word=name_i+",登陆成功"
              msgbox("2",word)
              permission="none"
              open_wf("per.txt",permission)
              seenum=c
              
              main()
            elif "admin"==name_i and "admin123"==number_i:
              msgbox("2","管理员登陆成功")
              w=input("警告：管理员禁止操作借、还书系统！！！")
              time.sleep(1)
              permission="true"
              open_wf("per.txt",permission)
              print(permission)
              seenum=c
              main()
            elif c==len(usrall)-1:
              msgbox("1","用户名或密码错误")
              login()
        else:
          msgbox("1"," ): 程序遇到未知错误,请检查配置")
    elif cho_0=="2":
      print("注册系统已关闭")
      login()
      while (1==2):
        start="1"
        newname=input("请输入用户名：")
        newnum=input("请输入密码：")
        for d in range(0,len(usrall)):
          if newname==usrall[d]:
            msgobx("2","用户名已存在")
            break
          else:
            start="0"
        if start=="0":
          newname=newname+"\r"
          newnum=newnum+"\r"
          open_wj("usrinfo.txt",newname)
          open_wj("number.txt",newnum)
          word="5"+"\r"
          open_wj("point.txt",word)
          word="\r"
          open_wj("seeword.txt",word)
          msgbox("2","新用户创建成功，请重启系统登录")
        else:
          s=0

主程序

代码：

def main():
  print('''欢迎来到图书管理系统
*******please choose:*********
******************************
**********0.显示全部**********
***1.借书********2.还书*******
***3.添加图书****4.删除图书***
***5.修改图书****6.修改信息***
***7.退出登录****8.退出*******
******************************''')
  s=input("choose:")
  if s=="1":
    lend_book()
  elif s=="0":
    view_all()
  elif s=="2":
    return_book()
  elif s=="3":
    add_book()
  elif s=="7":
    back_to_login()
  elif s=="8":
    exit()

借书

def lend_book():
  canlendbook=open_r1("can lend.txt")
  bookISDN=open_r1("bookISDN.txt")
  points=open_r1("point.txt")
  for b in range(0,len(canlendbook)):
    canlendbook[b]=canlendbook[b].rstrip("\n")
    bookISDN[b]=bookISDN[b].rstrip("\n")
  for c in range(0,len(points)):
    points[c]=points[c].rstrip("\n")
  
  print('''请选择:
****************
***1.查找书名***
***2.查找书号***
****************''')
  s=input("choose:")
  if s=="1":
    bookname=input("请输入书名：")
    for b in range(0,len(canlendbook)):
      if canlendbook[b]==bookname:
        print("成功查找到书籍:",bookname)
        print("*********************************")
        print("请确认信息，无误请按Y")
        print()
        print("书籍名称：",canlendbook[b])
        print("书籍ISDN号：",bookISDN[b])
        s=input("请确认(Y/N)")
        if s=="Y":
          end_1=bookISDN[b]+"\r"
          end_2=canlendbook[b]+"\r"
          open_wj("ISDN.txt",end_1)
          open_wj("lended.txt",end_2)
          canlendbook.pop(b)
          bookISDN.pop(b)
          word_1=canlendbook[0]+"\r"
          word_2=bookISDN[0]+"\r"
          open_wf("can lend.txt",word_1)
          open_wf("bookISDN.txt",word_2)
          for b in range(0,len(bookISDN)-1):
            word1=canlendbook[b+1]+"\r"
            word2=bookISDN[b+1]+"\r"
            open_wj("can lend.txt",word1)
            open_wj("bookISDN.txt",word2)
          if int(points[seenum])>0:
            points[seenum]=str(int(points[seenum])-1)
            word=points[0]+"\r"
            open_wf("point.txt",word)
            for t in range(0,len(points)):
              word=points[t-1]+"\r"
              open_wj("point.txt",word)
            print("处理成功，您可再借出",points[seenum],"本书")
            main()
            break
          else:
            print("您借的书已达到5本，请先还书")
            main()
            break
        else:
          main()
      elif b==len(canlendbook)-1:
        word="找不到书籍'"+bookname+"',请检查拼写或此书已借出"
        msgbox("1",word)
        main()
        break
  elif s=="2":
    '''namenum=0'''
    findISDN=input("请输入ISDN编号:")
    for b in range(0,len(bookISDN)):
      if bookISDN[b]==findISDN:
        namenum=b
        print(b)
        print("成功查找到书籍：",canlendbook[b])
        bookname=canlendbook[b]
        print("*********************************")
        print("请确认信息，无误请按Y")
        print()
        print("书籍名称：",canlendbook[b])
        print("书籍ISDN号：",bookISDN[b])
        s=input("请确认(Y/N)")
        if s=="Y":
          end_1=bookISDN[b]+"\r"
          end_2=canlendbook[b]+"\r"
          open_wj("ISDN.txt",end_1)
          open_wj("lended.txt",end_2)
          canlendbook.pop(b)
          bookISDN.pop(b)
          word_1=canlendbook[0]+"\r"
          word_2=bookISDN[0]+"\r"
          open_wf("can lend.txt",word_1)
          open_wf("bookISDN.txt",word_2)
          for b in range(0,len(bookISDN)-1):
            word_1=canlendbook[b+1]+"\r"
            word_2=bookISDN[b+1]+"\r"
            open_wj("can lend.txt",word_1)
            open_wj("bookISDN.txt",word_2)
          
          '''seewords=open_r1("seeword.txt")
          for i in range(0,len(seewords)):
            seewords[i]=seewords[i].rstrip("\n")
          seewords[seenum+1]=str(seewords[seenum])+","+str(namenum)
          word=seewords[0]+"\n"
          open_wf("seeword.txt",word)
          for i in range(0,len(seewords)-1):
            word=seewords[i+1]+"\n"
            open_wj("seeword.txt",word)'''
          if int(points[seenum])>0:
            points[seenum]=str(int(points[seenum])-1)
            word=points[0]+"\r"
            open_wf("point.txt",word)
            for t in range(0,len(points)):
              word=points[t-1]+"\r"
              open_wj("point.txt",word)
            print("处理成功，您可再借出",points[seenum],"本书")
            main()
          else:
            print("您借的书已达到5本，请先还书")
            main()
        else:
          main()
      else:
        if b==len(bookISDN)-1:
          word="找不到书籍'"+bookname+"',请检查拼写或此书已借出"
          msgbox("1",word)
          main()

还书

def return_book():
  isdn=open_r1("ISDN.txt")
  namebook=open_r1("lended.txt")
  for i in range(0,len(isdn)):
    isdn[i]=isdn[i].rstrip("\n")
    namebook[i]=namebook[i].rstrip("\n")
  print('''请选择还书方式：
****************
***1.查找书名***
***2.查找书号***
****************''')
  s=input("choose:")
  if s=="1":
    s=input("书籍名称：")
    for x in range(0,len(namebook)):
      if s==namebook[x]:
        print("成功找到书籍",namebook[x])
        print("*********************************")
        print("请确认信息，无误请按Y")
        print()
        print("书籍名称：",namebook[x])
        print("书籍ISDN号：",isdn[x])
        s=input("请确认(Y/N)")
        if s=="Y":
          word_1=namebook[x]+"\r"
          word_2=isdn[x]+"\r"
          open_wj("can lend.txt",word_1)
          open_wj("bookISDN.txt",word_2)
          isdn.pop(x)
          namebook.pop(x)
          word1=isdn[0]+"\r"
          word2=namebook[0]+"\r"
          open_wf("lended.txt",word2)
          open_wf("ISDN.txt",word1)
          for i in range(0,len(isdn)-1):
            word_1=isdn[i+1]+"\r"
            word_2=namebook[i+1]+"\r"
          
            open_wj("ISDN.txt",word_1)
            open_wj("lended.txt",word_2)
          points=open_r1("point.txt")
          for i in range(0,len(points)):
            points[i]=points[i].rstrip("\n")
          points[seenum]=str(int(points[seenum])+1)
          word=points[0]+"\r"
          open_wf("point.txt",word)
          for t in range(0,len(points)):
            word=points[t-1]+"\r"
            open_wj("point.txt",word)
          main()
        elif s=="N":
          main()
      else:
        if x==len(namebook)-1:
          print("没有找到图书'",s,"',请检查拼写是否正确")
          main()
  elif s=="2":
    
    s=input("请输入ISDN号：")
    for x in range(0,len(isdn)):
      if s==isdn[x]:
        print("成功找到书籍",namebook[x])
        print("*********************************")
        print("请确认信息，无误请按Y")
        print()
        print("书籍名称：",namebook[x])
        print("书籍ISDN号：",isdn[x])
        s=input("请确认(Y/N)")
        if s=="Y":
          word_1=namebook[x]+"\r"
          word_2=isdn[x]+"\r"
          open_wj("can lend.txt",word_1)
          open_wj("bookISDN.txt",word_2)
          isdn.pop(x)
          namebook.pop(x)
          word1=isdn[0]+"\r"
          word2=namebook[0]+"\r"
          open_wf("lended.txt",word2)
          open_wf("ISDN.txt",word1)
          for i in range(0,len(isdn)-1):
            word_1=isdn[i+1]+"\r"
            word_2=namebook[i+1]+"\r"
            open_wj("ISDN.txt",word_1)
            open_wj("lended.txt",word_2)
          points=open_r1("point.txt")
          for i in range(0,len(points)):
            points[i]=points[i].rstrip("\n")
          points[seenum]=str(int(points[seenum])+1)
          word=points[0]+"\r"
          open_wf("point.txt",word)
          for t in range(0,len(points)):
            word=points[t-1]+"\r"
            open_wj("point.txt",word)
          main()
        elif s=="N":
          main()
      else:
        if x==len(namebook)-1:
          print("没有找到图书'",s,"',请检查拼写是否正确")
          main()

显示全部书籍

def view_all():
  inbook=open_r1("can lend.txt")
  inISDN=open_r1("bookISDN.txt")
  borbook=open_r1("lended.txt")
  borISDN=open_r1("ISDN.txt")
  for b in range(0,len(inbook)):
    inbook[b]=inbook[b].rstrip("\n")
    inISDN[b]=inISDN[b].rstrip("\n")
  for c in range(0,len(borbook)):
    borbook[c]=borbook[c].rstrip("\n")
    borISDN[c]=borISDN[c].rstrip("\n")
  print("本馆内现有的图书(数量：",len(inbook),"本)")
  print("*****************************************")
  print("书名         ISDN（分区，书号）")
  for i in range(0,len(inbook)):
    print(inbook[i],"         ",inISDN[i])
  print("本馆已借出的图书(数量：",len(borbook),"本)")
  print("*****************************************")
  print("书名         ISDN（分区，书号）")
  for i in range(0,len(borbook)):
    print(borbook[i],"         ",borISDN[i])
  print("*****************************************")
  main()

添加图书

def add_book():
  permission=open_r("per.txt")
  if permission=="true":
    print("欢迎来到图书添加系统")
    a_name=input("请输入书籍名称：")
    a_ISDN=input("请输入ISDN编号：")
    word_1=a_name+"\r"
    word_2=a_ISDN+"\r"
    open_wj("can lend.txt",word_1)
    open_wj("bookISDN.txt",word_2)
    print('''请选择：
***************
**1.继续添加***
**2.退出添加***
***************''')
    s=input("choose:")
    if s=="1":
      add_book()
    elif s=="2":
      main()
  else:
    print("您不是管理员，没有修改权限")
    main()

全部代码

import tkinter
import tkinter.messagebox
import random
import time
#used
#a,b,c,d,e,f,g,h,i,j,k
#a,
#参数设置
c=[]
seenum=0
permission=0
#
def open_wf(name,write):
  str(write)
  with open(name,"w",encoding="utf-8") as f:
    f.write(write)
    f.close()
  return True
def open_wj(name,write):
  str(write)
  with open(name,"a",encoding="utf-8") as f:
    f.write(write)
    f.close()
  return True
def open_r(name):
    with open (name,"r",encoding="utf-8") as f:
        data = f.readline()
        f.close()
    return data
def open_r1(name):
    with open (name,"r",encoding="utf-8") as f:
        data = f.readlines()
        f.close()
    return data

def now():
    times=time.localtime()
    now=str(times.tm_hour)+":"+str(times.tm_min)+":"+str(times.tm_sec)
    return now
def msgbox(flag,word):
    if flag=="1":
        print(word)
    elif flag=="2":
        print(word)
def login():
    usrall=open_r1("usrinfo.txt")
    number=open_r1("number.txt")
    #去掉\n
    for a in range(0,len(usrall)):
        usrall[a]=usrall[a].rstrip("\n")
    name=[]
    for b in range(0,len(number)):
        number[b]=number[b].rstrip("\n")
    name=[]
    seenum=0
    
    print('''欢迎来到登录系统
提示：注册系统暂时关闭
*please choose:*
****************
*****1.登录*****
*****2.EMPTY****
****************''')
    cho_0=input("*********choose:")
    go="0"
    if cho_0=="1":
        name_i=input("用户名：")
        number_i=input("密码：")
        if len(usrall)==len(number):
          for c in range(0,len(usrall)):
            if usrall[c]==name_i and number[c]==number_i:
              word=name_i+",登陆成功"
              msgbox("2",word)
              permission="none"
              open_wf("per.txt",permission)
              seenum=c
              
              main()
            elif "admin"==name_i and "admin123"==number_i:
              msgbox("2","管理员登陆成功")
              w=input("警告：管理员禁止操作借、还书系统！！！")
              time.sleep(1)
              permission="true"
              open_wf("per.txt",permission)
              print(permission)
              seenum=c
              main()
            elif c==len(usrall)-1:
              msgbox("1","用户名或密码错误")
              login()
        else:
          msgbox("1"," ): 程序遇到未知错误,请检查配置")
    elif cho_0=="2":
      print("注册系统已关闭")
      login()
      while (1==2):
        start="1"
        newname=input("请输入用户名：")
        newnum=input("请输入密码：")
        for d in range(0,len(usrall)):
          if newname==usrall[d]:
            msgobx("2","用户名已存在")
            break
          else:
            start="0"
        if start=="0":
          newname=newname+"\r"
          newnum=newnum+"\r"
          open_wj("usrinfo.txt",newname)
          open_wj("number.txt",newnum)
          word="5"+"\r"
          open_wj("point.txt",word)
          word="\r"
          open_wj("seeword.txt",word)
          msgbox("2","新用户创建成功，请重启系统登录")
        else:
          s=0
def main():
  print('''欢迎来到图书管理系统
*******please choose:*********
******************************
**********0.显示全部**********
***1.借书********2.还书*******
***3.添加图书****4.删除图书***
***5.修改图书****6.修改信息***
***7.退出登录****8.退出*******
******************************''')
  s=input("choose:")
  if s=="1":
    lend_book()
  elif s=="0":
    view_all()
  elif s=="2":
    return_book()
  elif s=="3":
    add_book()
  elif s=="7":
    back_to_login()
  elif s=="8":
    exit()
#借书
def lend_book():
  canlendbook=open_r1("can lend.txt")
  bookISDN=open_r1("bookISDN.txt")
  points=open_r1("point.txt")
  for b in range(0,len(canlendbook)):
    canlendbook[b]=canlendbook[b].rstrip("\n")
    bookISDN[b]=bookISDN[b].rstrip("\n")
  for c in range(0,len(points)):
    points[c]=points[c].rstrip("\n")
  
  print('''请选择:
****************
***1.查找书名***
***2.查找书号***
****************''')
  s=input("choose:")
  if s=="1":
    bookname=input("请输入书名：")
    for b in range(0,len(canlendbook)):
      if canlendbook[b]==bookname:
        print("成功查找到书籍:",bookname)
        print("*********************************")
        print("请确认信息，无误请按Y")
        print()
        print("书籍名称：",canlendbook[b])
        print("书籍ISDN号：",bookISDN[b])
        s=input("请确认(Y/N)")
        if s=="Y":
          end_1=bookISDN[b]+"\r"
          end_2=canlendbook[b]+"\r"
          open_wj("ISDN.txt",end_1)
          open_wj("lended.txt",end_2)
          canlendbook.pop(b)
          bookISDN.pop(b)
          word_1=canlendbook[0]+"\r"
          word_2=bookISDN[0]+"\r"
          open_wf("can lend.txt",word_1)
          open_wf("bookISDN.txt",word_2)
          for b in range(0,len(bookISDN)-1):
            word1=canlendbook[b+1]+"\r"
            word2=bookISDN[b+1]+"\r"
            open_wj("can lend.txt",word1)
            open_wj("bookISDN.txt",word2)
          if int(points[seenum])>0:
            points[seenum]=str(int(points[seenum])-1)
            word=points[0]+"\r"
            open_wf("point.txt",word)
            for t in range(0,len(points)):
              word=points[t-1]+"\r"
              open_wj("point.txt",word)
            print("处理成功，您可再借出",points[seenum],"本书")
            main()
            break
          else:
            print("您借的书已达到5本，请先还书")
            main()
            break
        else:
          main()
      elif b==len(canlendbook)-1:
        word="找不到书籍'"+bookname+"',请检查拼写或此书已借出"
        msgbox("1",word)
        main()
        break
  elif s=="2":
    '''namenum=0'''
    findISDN=input("请输入ISDN编号:")
    for b in range(0,len(bookISDN)):
      if bookISDN[b]==findISDN:
        namenum=b
        print(b)
        print("成功查找到书籍：",canlendbook[b])
        bookname=canlendbook[b]
        print("*********************************")
        print("请确认信息，无误请按Y")
        print()
        print("书籍名称：",canlendbook[b])
        print("书籍ISDN号：",bookISDN[b])
        s=input("请确认(Y/N)")
        if s=="Y":
          end_1=bookISDN[b]+"\r"
          end_2=canlendbook[b]+"\r"
          open_wj("ISDN.txt",end_1)
          open_wj("lended.txt",end_2)
          canlendbook.pop(b)
          bookISDN.pop(b)
          word_1=canlendbook[0]+"\r"
          word_2=bookISDN[0]+"\r"
          open_wf("can lend.txt",word_1)
          open_wf("bookISDN.txt",word_2)
          for b in range(0,len(bookISDN)-1):
            word_1=canlendbook[b+1]+"\r"
            word_2=bookISDN[b+1]+"\r"
            open_wj("can lend.txt",word_1)
            open_wj("bookISDN.txt",word_2)
          
          '''seewords=open_r1("seeword.txt")
          for i in range(0,len(seewords)):
            seewords[i]=seewords[i].rstrip("\n")
          seewords[seenum+1]=str(seewords[seenum])+","+str(namenum)
          word=seewords[0]+"\n"
          open_wf("seeword.txt",word)
          for i in range(0,len(seewords)-1):
            word=seewords[i+1]+"\n"
            open_wj("seeword.txt",word)'''
          if int(points[seenum])>0:
            points[seenum]=str(int(points[seenum])-1)
            word=points[0]+"\r"
            open_wf("point.txt",word)
            for t in range(0,len(points)):
              word=points[t-1]+"\r"
              open_wj("point.txt",word)
            print("处理成功，您可再借出",points[seenum],"本书")
            main()
          else:
            print("您借的书已达到5本，请先还书")
            main()
        else:
          main()
      else:
        if b==len(bookISDN)-1:
          word="找不到书籍'"+bookname+"',请检查拼写或此书已借出"
          msgbox("1",word)
          main()
def view_all():
  inbook=open_r1("can lend.txt")
  inISDN=open_r1("bookISDN.txt")
  borbook=open_r1("lended.txt")
  borISDN=open_r1("ISDN.txt")
  for b in range(0,len(inbook)):
    inbook[b]=inbook[b].rstrip("\n")
    inISDN[b]=inISDN[b].rstrip("\n")
  for c in range(0,len(borbook)):
    borbook[c]=borbook[c].rstrip("\n")
    borISDN[c]=borISDN[c].rstrip("\n")
  print("本馆内现有的图书(数量：",len(inbook),"本)")
  print("*****************************************")
  print("书名         ISDN（分区，书号）")
  for i in range(0,len(inbook)):
    print(inbook[i],"         ",inISDN[i])
  print("本馆已借出的图书(数量：",len(borbook),"本)")
  print("*****************************************")
  print("书名         ISDN（分区，书号）")
  for i in range(0,len(borbook)):
    print(borbook[i],"         ",borISDN[i])
  print("*****************************************")
  main()
def return_book():
  isdn=open_r1("ISDN.txt")
  namebook=open_r1("lended.txt")
  for i in range(0,len(isdn)):
    isdn[i]=isdn[i].rstrip("\n")
    namebook[i]=namebook[i].rstrip("\n")
  print('''请选择还书方式：
****************
***1.查找书名***
***2.查找书号***
****************''')
  s=input("choose:")
  if s=="1":
    s=input("书籍名称：")
    for x in range(0,len(namebook)):
      if s==namebook[x]:
        print("成功找到书籍",namebook[x])
        print("*********************************")
        print("请确认信息，无误请按Y")
        print()
        print("书籍名称：",namebook[x])
        print("书籍ISDN号：",isdn[x])
        s=input("请确认(Y/N)")
        if s=="Y":
          word_1=namebook[x]+"\r"
          word_2=isdn[x]+"\r"
          open_wj("can lend.txt",word_1)
          open_wj("bookISDN.txt",word_2)
          isdn.pop(x)
          namebook.pop(x)
          word1=isdn[0]+"\r"
          word2=namebook[0]+"\r"
          open_wf("lended.txt",word2)
          open_wf("ISDN.txt",word1)
          for i in range(0,len(isdn)-1):
            word_1=isdn[i+1]+"\r"
            word_2=namebook[i+1]+"\r"
          
            open_wj("ISDN.txt",word_1)
            open_wj("lended.txt",word_2)
          points=open_r1("point.txt")
          for i in range(0,len(points)):
            points[i]=points[i].rstrip("\n")
          points[seenum]=str(int(points[seenum])+1)
          word=points[0]+"\r"
          open_wf("point.txt",word)
          for t in range(0,len(points)):
            word=points[t-1]+"\r"
            open_wj("point.txt",word)
          main()
        elif s=="N":
          main()
      else:
        if x==len(namebook)-1:
          print("没有找到图书'",s,"',请检查拼写是否正确")
          main()
  elif s=="2":
    
    s=input("请输入ISDN号：")
    for x in range(0,len(isdn)):
      if s==isdn[x]:
        print("成功找到书籍",namebook[x])
        print("*********************************")
        print("请确认信息，无误请按Y")
        print()
        print("书籍名称：",namebook[x])
        print("书籍ISDN号：",isdn[x])
        s=input("请确认(Y/N)")
        if s=="Y":
          word_1=namebook[x]+"\r"
          word_2=isdn[x]+"\r"
          open_wj("can lend.txt",word_1)
          open_wj("bookISDN.txt",word_2)
          isdn.pop(x)
          namebook.pop(x)
          word1=isdn[0]+"\r"
          word2=namebook[0]+"\r"
          open_wf("lended.txt",word2)
          open_wf("ISDN.txt",word1)
          for i in range(0,len(isdn)-1):
            word_1=isdn[i+1]+"\r"
            word_2=namebook[i+1]+"\r"
            open_wj("ISDN.txt",word_1)
            open_wj("lended.txt",word_2)
          points=open_r1("point.txt")
          for i in range(0,len(points)):
            points[i]=points[i].rstrip("\n")
          points[seenum]=str(int(points[seenum])+1)
          word=points[0]+"\r"
          open_wf("point.txt",word)
          for t in range(0,len(points)):
            word=points[t-1]+"\r"
            open_wj("point.txt",word)
          main()
        elif s=="N":
          main()
      else:
        if x==len(namebook)-1:
          print("没有找到图书'",s,"',请检查拼写是否正确")
          main()
def add_book():
  permission=open_r("per.txt")
  if permission=="true":
    print("欢迎来到图书添加系统")
    a_name=input("请输入书籍名称：")
    a_ISDN=input("请输入ISDN编号：")
    word_1=a_name+"\r"
    word_2=a_ISDN+"\r"
    open_wj("can lend.txt",word_1)
    open_wj("bookISDN.txt",word_2)
    print('''请选择：
***************
**1.继续添加***
**2.退出添加***
***************''')
    s=input("choose:")
    if s=="1":
      add_book()
    elif s=="2":
      main()
  else:
    print("您不是管理员，没有修改权限")
    main()
def back_to_login():
  ch=input("确认退出登录？(Y/N)")
  if ch=="Y":
    print("已成功退出登录")
    login()
  elif ch++"N":
    main()
login()