需要帮助在Linux机器上对Python中已处理的mdb文件进行排序

I am trying to extract a table from .mdb file, then filter that table and spit out the result into short .csv file. So far I was able to extract the table needed and save it's content into .CSV. But I dont know how can I sort that data and extract the necessary rows I need. I guess I could save the the whole .csv and then reopen it, but it would take huge amount of space since I need to process about 2000 mdb files. I just want to extract certain rows.I am trying to extract a table from .mdb file,