csv2tsv.py

#!/usr/bin/env python3
import argparse
import csv

ABOUT = """
Convert .csv (Comma Separated Value) file to .tsv (Tab Separated Value) file.
Output to STDOUT. (redirect to a file or another process)
"""


def main():
    parser = argparse.ArgumentParser(description=ABOUT)
    parser.add_argument('csv', help='CSV file to convert')
    args = parser.parse_args()

    infile = args.csv

    with open(infile, newline='') as csvfile:
        csvreader = csv.reader(csvfile, delimiter=',')
        for row in csvreader:
            print('\t'.join(row))


if __name__ == '__main__':
    main()

download and set +x to the script:

wget https://gist.githubusercontent.com/hornc/8ab7c455f351e8f1ef96ec8623041a15/raw/676d25256439f5187791124ffa4cc3b86287cde7/csv2tsv.py && chmod +x csv2tsv.py