python文件中各时长为秒求和并转换为时分秒

文件中各时长为秒求和并转换为时分秒

def get_time():
    n = 0
    with open("文件.txt", mode="r", encoding='utf-8') as f:
        for line in f:
            if line.startswith("#EXTINF:"):
                line = line.strip()
                line = line.strip(",")
                n += float(line.split(":")[-1])
    times =str(datetime.timedelta(seconds=n))
    print(times)


def main():
    get_time()


if __name__ == '__main__':
    main()