Livesplit - Add an offset to all the splits game time of a run.

split-offset.py

from datetime import datetime, timedelta
from xml.dom import minidom

file_name = "Portal 2 - first run.lss"

lss_file = minidom.parse(file_name)

game_times = lss_file.getElementsByTagName('GameTime')

for game_time in game_times:
    string_game_time = game_time.firstChild.data[0:8]
    t = datetime.strptime(string_game_time,'%H:%M:%S')
    delta = timedelta(hours=t.hour, minutes=t.minute, seconds=t.second, microseconds=t.microsecond)
    offset_delta = timedelta(minutes=4, seconds=41, microseconds=130000)

    new_time = delta + offset_delta
    print(new_time)

    game_time.firstChild.data = new_time

with open(file_name, "w") as xml_file:
    lss_file.writexml(xml_file)