How to use append_csv

Hi, I want to use a custom trade file, in format csv, may be you have some example of csv-file and how to custom the append_csv. [ append_csv(file_name, param_locs=range(0, 11), delimiter=’, ’, skiprows=1, de-fault_timezone=None) ]
My idea it's to use your sw to calc the capital gain of trade [ future, options, stocks...], that I export the info in csv format from my broker site.
Many thanks.