def seconds_to_hms(seconds):
    """
    Converts seconds float to 'hh:mm:ss.ssssss' format.
    """
    hours = int(seconds / 3600.0)
    minutes = int((seconds / 60.0) % 60.0)
    secs = float(seconds % 60.0)
    return "{0:02d}:{1:02d}:{2:02.6f}".format(hours, minutes, secs)