If the question is very simple, you don’t even need to usecsv:

with open('old.csv') as reader, open('new.csv', 'w') as writer: for line in reader: items = line.strip().split() print(' '.join(items[:2]+items[3:]), file=writer)

Write a general:

import csv def del_cvs_col(fname, newfname, idxs, delimiter=' '): with open(fname) as csvin, open(newfname, 'w') as csvout: reader = csv.reader(csvin, delimiter=delimiter) writer = csv.writer(csvout, delimiter=delimiter) rows = (tuple(item for idx, item in enumerate(row) if idx not in idxs) for row in reader) writer.writerows(rows) del_cvs_col('a.csv', 'b.csv', [2])

The column specified in

del_cvs_col會將fname轉成newfname用delimiter來做分割字元，且會去除掉在idxs.

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Questions I answered: Python-QA

For reference only, I feel like there is something wrong

# coding=utf-8 import csv origin_f = open('csv.csv', 'rb') new_f = open('new_csv.csv', 'wb+') reader = csv.reader(origin_f) writer = csv.writer(new_f) for row in reader: del row[-1] print row writer.writerow(row) origin_f.close() new_f.close()