Replace data in csv file using python

Question

This is the new input file format. I need to automate the process of replacing the content of one column in a .csv file with the use of python. I can also open the .csv file

Answer 1

You could use the csv module in Python to achieve this.

csv.reader will return each row as a list of strings. You could then use csv.writer to stream each row and modify the ID column at this point, this will create a new file though.

So:

import csv
reader = csv.reader(open('file.csv', 'rb'))
writer = csv.writer(open('outfile.csv','wb'))
for row in reader:
    writer.writerow([row[0], "input", row[2], row[3]])