dataframe python

HI, I have a question about dataframe.  I had used fetchmany to fetch data from cursor multiple times. Each time after I fetch the data, I need append to a dataframe. How can I do it?

def db_execute(sql, execution_type):
    try:
        conn = get_connection_handle()
        conn.autocommit = True
        cursor = conn.cursor()
        cursor.execute(sql)
        if execution_type == _READ:
            while True:
       
                results = cursor.fetchmany(4000)

                if not results:
                    break
               
                data = pd.DataFrame(results)
                 // how can I append the new dataframe to the previous dataframe, so at the end of the loop, I can get one dataframe with all the data?
             

        cursor.close()
        close_connection_handle(conn)
        return results