Open csv file and just save a few columns

trim.py

# module load python/3.6-anaconda-4.4

import csv
with open("susy_full_normed_train.csv","rt", encoding="utf8") as source:
    rdr= csv.reader( source )
    with open("susy_full_normed_train_low_features.csv","wt") as result:
        wtr= csv.writer( result )
        for r in rdr:
            wtr.writerow( (r[0], r[1], r[2], r[3], r[4], r[5], r[6], r[7] ) )