要在python中列出的csv文件

Question

I have a CSV file which looks like this:

File,2/13/2017,domain\test_roi,root_user,ntsrv1,/vol/vol_ntsrv1_02,983,0,Prod,983
File,2/13/2017,domain\test_roi,root_user,ntsrv1,/vol/vol_ntsrv1_03,124,0,Prod ,124
File,2/13/2017,domain\test_roi,root_user,ntsrv1,/vol/vol_ntsrv1_04,206,0,Prod,206
File,2/13/2017,domain\test_roi,root_user,ntsrv1,/vol/vol_ntsrv1_05,983,0,Prod ,983
File,2/13/2017,domain\test_roi,root_user,ntsrv1,/vol/vol_ntsrv1_06,564,0,Prod,564
File,2/13/2017,domain\test_roi,root_user,ntsrv1,/vol/vol_ntsrv1_07,189,0,Prod ,189
File,2/13/2017,domain\test_roi,root_user,ntsrv1,/vol/vol_ntsrv1_08,168,0,Prod,168
File,2/13/2017,domain\test_roi,root_user,ntsrv1,/vol/vol_ntsrv1_09,570,0,Prod ,570
File,2/13/2017,domain\test_roi,root_user,ntsrv1,/vol/vol_ntsrv1_10,189,0,Prod,189
File,2/13/2017,domain\test_roi,root_user,ntsrv1,/vol/vol_ntsrv1_11,204,0,Prod ,204
File,2/13/2017,domain\test_roi,root_user,ntsrv1,/vol/vol_ntsrv1_12,189,2,Prod,187
File,2/13/2017,domain\test_roi,root_user,ntsrv1,/vol/vol_ntsrv1_13,568,0,Prod ,568
File,2/13/2017,domain\test_roi,root_user,ntsrv1,/vol/vol_ntsrv1_14,204,0,Prod,204
File,2/13/2017,domain\test_roi,root_user,ntsrv1,/vol/vol_ntsrv1_15,142,0,Prod ,142
File,2/13/2017,domain\test_roi,root_user,ntsrv1,/vol/vol_ntsrv1_16,168,0,Prod,168

I want to add to a list the 4th column (root_user) and the 7th column (where the numbers are written). Any suggestions how?

Answer 1

It's pretty simple this way:

fourth_column_list = []
seventh_column_list = []
with open(my_csv_file, 'r') as infile:
    parsed = (x.split(',') for line in infile)  # get all parsed columns
    for parsed_line in parsed:  # iterate over parsed lines
        fourth_column_list.append(parsed_line[3])  # append 4th column
        seventhth_column_list.append(parsed_line[6])  # append 7th column

Answer 2

import csv

four_col, seven_col = [], []
with open(file='test.csv', mode='r', encoding='utf-8') as csvfile:
    spamreader = csv.reader(csvfile, delimiter=',', quotechar='"')
    # firstline = csvfile.readline()  # if csv have header uncomment it
    for row in spamreader:
        four_col.append(row[3])
        seven_col.append(row[6])

With this csv file you can read it also setting the spamreader as:

spamreader = csv.reader(csvfile, dialect='excel')

but I wrote you the more generic way if the file don't uses commas for delimiter.