本文实例为大家分享了python实现图书管理系统的具体代码,供大家参考,具体内容如下
软件python
事先用代码写一个存储数据的数据库,也就是,.txt文件
这是我模拟的一个数据
d1='[{"用户名": "admin", "密码": "123", "姓名": "张三"},{"用户名": "aaa", "密码": "123", "姓名": "李四"}]'
with open(r"name_list.txt","w") as f:
f.write(d1)
d2='[{"编号":1001, "书名": "红楼梦", "作者": "曹雪芹", "借出状态": "可借"},\
{"编号":1002, "书名": "java教程","作者": "齐一天", "借出状态": "可借"},\
{"编号":1003, "书名": "圣经","作者": "耶稣", "借出状态": "已借出"},\
{"编号":1004, "书名": "李白诗集","作者": "李白", "借出状态": "可借"}\
]'
with open(r"books.txt","w") as f:
f.write(d2)
数据准备好开始:
一步是读取数据库中的数据,将其转换为字符串,因为接下来的数据都是字符串的处理
def readUser():
with open(r"name_list.txt","r") as f:
jsondata=f.read()
userlist=json.loads(jsondata)
return userlist
这一步是将外部数据写入数据库
def writeData(listb):
jsondata=json.dumps(listb,ensure_ascii=False)
with open(r"name_list.txt","w") as f:
f.write(jsondata)
print("----------------数据写入成功!")
1.用户登录:
def login():
userlist=readUser()
uname=input("请输入您的用户名:")
upwd=input("请输入您的密码:")
msg="失败"
for user in userlist:
if uname==user["用户名"] and upwd==user["密码"]:
print("恭喜",user["姓名"],"登录成功")
msg="成功"
if msg=="失败":
print("登录失败,请从新登录!")
return msg
2.显示图书列表:
def Showbooklist():
Booklist=readBook()
print("**************************图书目录**************************")
for data in Booklist:
print(data["编号"],"\t",data["书名"],"\t\t\t",data["作者"],"\t\t\t",data["借出状态"])
print("---------------------------------------------------")
3.添加图书
def addBook():
Booklist=readBook()
numlist=[]
for book in Booklist:
numlist.append(book["编号"])
newnum=max(numlist)+1
Bname=input("请输入书名:")
writer=input("请输入图书作者:")
condi="可借"
newBooklist={"编号": newnum, "书名": Bname, "作者": writer,"借出状态":condi}
Booklist.append(newBooklist)
writeBook(Booklist)
4.删除图书
def delbook():
Booklist=readBook()
Bnum=int(input("请输入要删除的图书编号:"))
Bname=input("请输入要删除的图书名称:")
for book in Booklist:
if Bnum==book["编号"] or Bname==book["书名"]:
Booklist.remove(book)
print("图书已",book["书名"],"经删除")
writeBook(Booklist)
5.借阅图书
def lendbook():
Booklist=readBook()
Bnum=int(input("请输入要借阅的图书编号:"))
Bname=input("请输入要借阅的图书名称:")
for book in Booklist:
if Bnum==book["编号"] or Bname==book["书名"]:
if book["借出状态"]=="可借":
print("此书在架,可借阅")
a=int(input("借阅请安1,退出请按0:"))
if a==1:
book["借出状态"]="已借出"
else:
break
else:
print("此书已被借出,等归还后再借")
writeBook(Booklist)
6.归还图书
def returnbook():
Booklist=readBook()
Bnum=int(input("请输入要还的图书编号:"))
Bname=input("请输入要还的图书名称:")
for book in Booklist:
if Bnum==book["编号"] or Bname==book["书名"]:
if book["借出状态"]=="已借出":
book["借出状态"]="可借"
print(book["书名"],"已还")
else:
print(book["书名"],"书已在架,不用归还")
writeBook(Booklist)
最后是调用所有模块的总程序:
while 1==1:
print("*************************图书管理系统2.0******************************")
msg=login()
if msg=="成功":
print("1.显示所有的图书;\n2.图书上架;\n3.图书下架;\n4.借阅;\n5.归还;\n6.退出")
print("---------------------------------------------------------------------")
while 2==2:
choice=int(input("请输入业务编号(1-6):"))
if choice==1:
Showbooklist()
elif choice==2:
addBook()
elif choice==3:
delbook()
elif choice==4:
lendbook()
elif choice==5:
returnbook()
elif choice==6:
break
else:
print("没有此业务,请重新选择")
continue
这位是执行后的效果图。
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持编程网。