import sqlite3

from sqlite3 import Error

​

​

def create_connection(db_file):

    """ create a database connection to the SQLite database

        specified by the db_file

    :param db_file: database file

    :return: Connection object or None

    """

    conn = None

    try:

        conn = sqlite3.connect(db_file)

    except Error as e:

        print(e)

​

    return conn

​

​

def select_all_tasks(conn):

    """

    Query all rows in the tasks table

    :param conn: the Connection object

    :return:

    """

    cur = conn.cursor()

    cur.execute("SELECT * FROM tasks")

​

    rows = cur.fetchall()

​

    for row in rows:

        print(row)

​

​

def select_task_by_priority(conn, priority):

    """

    Query tasks by priority

    :param conn: the Connection object

    :param priority:

    :return:

    """

    cur = conn.cursor()

    cur.execute("SELECT * FROM tasks WHERE priority=?", (priority,))

​

    rows = cur.fetchall()

​

    for row in rows:

        print(row)

​

​

def main():

    database = r"C:\sqlite\db\pythonsqlite.db"

​

    # create a database connection

    conn = create_connection(database)

    with conn:

        print("1. Query task by priority:")

        select_task_by_priority(conn, 1)

​

        print("2. Query all tasks")

        select_all_tasks(conn)

​

​

if __name__ == '__main__':

    main()

Code language: Python (python)