Python sqlite3 notebook

import sqlite3
from sqlite3 import Error

class DB:
    def __init__(self, dbname):
        try:
            self.connect = sqlite3.connect(dbname)
            self.cursor = self.connect.cursor()
        except Error:
            print("Ошибка подключения к базе данных")
        else:
            print(f"connect to {dbname}")

    def table_is_exist(self, table_name):
        sql = f"""SELECT name
                FROM sqlite_master
                WHERE type='table' AND name='{table_name}';"""
        self.cursor.execute(sql)
        rows = self.cursor.fetchall()
        return len(rows) == 1

    def create_tables(self):
        if not self.table_is_exist('notes'):
            sql = """
                CREATE table notes(
                    id integer PRIMARY KEY AUTOINCREMENT,
                    date_note datetime,
                    title text,
                    note_text text,
                    is_done integer
                );
            """
            self.cursor.execute(sql)

    def add_note(self, date_note, title, note_text):
        sql = """
            INSERT INTO notes(date_note,
            title,
            note_text)
            VALUES(?, ?, ?)
        """
        self.cursor.execute(sql, (date_note, title, note_text))
        self.connect.commit()


    def read_notes(self):
        sql = """SELECT id, date_note, title, note_text, is_done
        FROM notes
        """
        self.cursor.execute(sql)
        rows = self.cursor.fetchall()
        for row in rows:
            print(row)

db = DB("my_notes.db")
print("SELECT notes #1")
db.read_notes()
db.add_note('2020-12-20 9:00:00',
            'Выучить python!',
            "Изучить python3 и написать новый гугл")
print("SELECT notes #2")
db.read_notes()