script_back.py

import sqlite3

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

def insert(title, author, year, isbn):
    conn = sqlite3.connect("books.db")
    cur=conn.cursor()
    cur.execute("INSERT INTO book VALUES (NULL, ? , ?, ?, ?)", (title, author,year,isbn))
    conn.commit()
    conn.close()

def view():
    conn = sqlite3.connect("books.db")
    cur=conn.cursor()
    cur.execute("SELECT * FROM book")
    rows=cur.fetchall()
    conn.close()
    return rows

def search(title="", author="", year="", isbn=""): #when the user search only one parameters the function assign an empty value for the others
    conn = sqlite3.connect("books.db")
    cur=conn.cursor()
    cur.execute("SELECT * From book WHERE title=? OR author=? OR year=? OR isbn=?", (title, author, year, isbn))
    rows=cur.fetchall()
    conn.close()
    return rows

def delete(id):
    conn = sqlite3.connect("books.db")
    cur=conn.cursor()
    cur.execute("DELETE FROM book WHERE id=?", (id,))
    conn.commit()
    conn.close()

def update(id, title, author, year, isbn):
    conn = sqlite3.connect("books.db")
    cur=conn.cursor()
    cur.execute("UPDATE book SET title=?, author=?, year=?, isbn=? WHERE id=?", (title, author, year, isbn, id))
    conn.commit()
    conn.close()


connect()
# print(view())

# print(search(author='John Tablet'))