Project 2 Library Book Management System

.py and .ipynb files are atatched below

Code-

import sqlite3
from tkinter import *
from tkinter import messagebox

class DB:
def __init__(self):
self.conn=sqlite3.connect("mybooks.db")
self.cur=self.conn.cursor()
self.cur.execute("CREATE TABLE IF NOT EXISTS book(id INTEGER PRIMARY KEY,title TEXT,author TEXT,isbn TEXT,year TEXT)")
self.conn.commit()

def __del__(self):
self.conn.close()

def view(self):
self.cur.execute("SELECT * FROM book")
rows=self.cur.fetchall()
return rows

def insert(self,title,author,isbn,year):
self.cur.execute("INSERT INTO book VALUES (NULL,?,?,?,?)",(title,author,isbn,year))
self.conn.commit()
self.view()

def delete(self,id):
self.cur.execute("DELETE FROM book WHERE id=?", (id,))
self.conn.commit()
self.view()

def search(self,title="",author="",year=""):
self.cur.execute("SELECT * FROM book WHERE title=? OR author=? OR year=?",(title,author,year,))
rows = self.cur.fetchall()
return rows

db=DB()

def get_selected_row(event):
global selected_tuple
index=list1.curselection()[0]
selected_tuple=list1.get(index)
e1.delete(0,END)
e1.insert(END,selected_tuple[1])
e2.delete(0,END)
e2.insert(END,selected_tuple[2])
e3.delete(0,END)
e3.insert(END,selected_tuple[3])
e4.delete(0,END)
e4.insert(END,selected_tuple[4])

def view_command():
list1.delete(0,END)
for row in db.view():
list1.insert(END,row)

def search_command():
list1.delete(0,END)
for row in db.search(title_text.get(),author_text.get(),year_text.get()):
list1.insert(END,row)

def add_command():
db.insert(title_text.get(),author_text.get(),isbn_text.get(),year_text.get())
list1.delete(0, END)
list1.insert(END,(title_text.get(),author_text.get(),isbn_text.get(),year_text.get()))

def delete_command():
db.delete(selected_tuple[0])

def issue_command():
list1.delete(0,END)
for row in db.search(title_text.get(),author_text.get(),year_text.get()):
list1.insert(END,row)
print('Book issued')

window = Tk()
window.title("Library")

def on_closing():
dd=db
if messagebox.askokcancel("EXIT", "Do you want to exit?"):
window.destroy()
del dd

window.protocol("WM_DELETE_WINDOW", on_closing)

l1=Label(window,text="Title")
l1.grid(row=0,column=0)
l2=Label(window,text="Author")
l2.grid(row=0,column=2)
l3=Label(window,text="ISBN")
l3.grid(row=1,column=0)
l4=Label(window,text="Year")
l4.grid(row=1,column=2)

title_text=StringVar()
e1=Entry(window,textvariable=title_text)
e1.grid(row=0,column=1)
author_text=StringVar()
e2=Entry(window,textvariable=author_text)
e2.grid(row=0,column=3)
isbn_text=StringVar()
e3=Entry(window,textvariable=isbn_text)
e3.grid(row=1,column=1)
year_text=StringVar()
e4=Entry(window,textvariable=year_text)
e4.grid(row=1,column=3)

list1=Listbox(window,height=25,width=65)
list1.grid(row=2,column=0,rowspan=6,columnspan=2)
sb1=Scrollbar(window)
sb1.grid(row=2,column=2,rowspan=6)
list1.configure(yscrollcommand=sb1.set)
sb1.configure(command=list1.yview)
list1.bind('<<ListboxSelect>>',get_selected_row)

b1=Button(window,text="View all",width=12,command=view_command)
b1.grid(row=2,column=3)
b2=Button(window,text="Search",width=12,command=search_command)
b2.grid(row=3, column=3)
b3=Button(window,text="Add",width=12,command=add_command)
b3.grid(row=4, column=3)
b4=Button(window, text="Issue book",width=12,command=issue_command)
b4.grid(row=5, column=3)
b5=Button(window, text="Delete selected",width=12,command=delete_command)
b5.grid(row=6,column=3)
b6=Button(window,text="Close",width=12,command=window.destroy)
b6.grid(row=7,column=3)

window.mainloop()