Spliting mp3 file in to multiple files with different lenghts defined in CSV file with ffmpeg

Multi-split.py

#!/usr/bin/python
from argparse import ArgumentParser
import csv, sys, subprocess, os.path
def main(argv):
    parser = ArgumentParser(description='A tool spliting mp3 file in to multiple files with different lenghts defined in  CSV file',
            epilog="Example:  multi-split.py 00:00:25.500,00:00:27.500 test.mp3")
    parser.add_argument('input_audio', help='source file to split')
    parser.add_argument('CSV_file', help='file contains: start, stop time, ouput file name')
    args = parser.parse_args()

    input_file = str(args.input_audio);
    output_folder = str(str(args.CSV_file) + '_output');
    
    with open(str(args.CSV_file), 'r') as f:
        reader = csv.reader(f)
        your_list = list(reader)
    if(not os.path.isdir(output_folder)):
        subprocess.call(['mkdir', output_folder]);
    for info in your_list:
        subprocess.call('ffmpeg -i \''+ input_file +'\' -vn -acodec copy -ss \''+ str(info[0]) +'\' -to '+ info[1] +' '+ 
                output_folder + '/' + str(args.CSV_file) + '-' + str(info[2]) + '.mp3', shell=True);
if __name__ == "__main__":
    main(sys.argv[1:])