import time


def get_elapsed_time(start_time) -> str:
    """ Gets nicely formatted timespan from start_time to now """
    end = time.time()
    hours, rem = divmod(end-start_time, 3600)
    minutes, seconds = divmod(rem, 60)
    return "{:0>2}:{:0>2}:{:05.2f}".format(int(hours), int(minutes), seconds)