def does_entry_exist(conn, tweet_id):
    """ Check weather entry with exact tweet_id already exists
    :param conn: DB connection
    :param tweet_id: tweet_id to check
    :return: True if story already in db, else False
    """
    cur = conn.cursor()
    cur.execute("SELECT * FROM tweets WHERE tweet_id=?", (tweet_id,))

    rows = cur.fetchall()

    if len(rows) > 0:
        return True

    else:
        return False