gistfile1.txt

def userexistcheck(username):
    connection = sqlite3.connect(DB_REL_PATH)
    c_db = connection.cursor()
    c_db.execute("SELECT ? FROM users", (username,))
    user = c_db.fetchone()
    connection.close()
    if user:
        user_exist = True
    else:
        user_exist = False
    return user_exist