tracklisting with running times (for youtube)

gistfile1.txt

"""
create running time for tracks in an album
1. song A 02:20
2. song B 01:30
3. song C 04:00
=>
1. song A 00:00
2. song B 02:20
3. song C 03:50
"""
import sys
import re

if __name__ == '__main__':
    with open(sys.argv[1], mode='r') as f:
        running_time = 0 # seconds
        for l in f.readlines():
            # track number follwed by . or ), track title and track duration with or
            # without parenthesis
            match = re.search(r'^(\d+[\.\)]+)(.+ )[\(\[]*(\d+):(\d+)[\)\]]*', l)
            track_number = match.group(1)
            track_title = match.group(2)
            track_min = match.group(3)
            track_sec = match.group(4)
            output = ''
            running_hrs = 0
            running_mins = running_time // 60
            running_sec = running_time % 60
            if running_mins > 60:
                running_hrs = running_mins // 60
                running_mins = running_mins % 60
                output = '{}{}{:02d}:{:02d}:{:02d}'.format(track_number,
                                                           track_title,
                                                           running_hrs,
                                                           running_mins,
                                                           running_sec)
            else:
                output = '{}{}{:02d}:{:02d}'.format(track_number,
                                                    track_title,
                                                    running_mins,
                                                    running_sec)


            print(output)
            running_time += int(track_min) * 60 + int(track_sec)