Realize a simple book management system with python

Realize a simple book management system with python

foreword

Many libraries have their own library management system, the main functions of which areBorrowing and Returning Books, and the librarian's operations on books, etc.

program structure

User login/register—>borrow books/return books/view books---->(administrator) add and modify book information

Preparation

txt file

First, create a folder in any location and create the following txt files:

bookISDN,ISDN.txt : store the ISDN number of the book
can lend,lended.txt : store the book name
number, usrinfo.txt : store the user name, password
point .txt : store the books that can be borrowed by each account
per.txt : store permission files

code preparation

Because this program will involve a lot of file reading, we can use the def function to simplify the process:

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)

Code

login system

code:

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

main program

code:

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()

borrow books

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()

return book

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()

show all books

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()

add book

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()

all codes

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()