from datetime import datetime
def get_duration(duration):
hours = int(duration / 3600)
minutes = int(duration % 3600 / 60)
seconds = int((duration % 3600) % 60)
return '{:02d}:{:02d}:{:02d}'.format(hours, minutes, seconds)
print(get_duration(3671))
'''
run:
01:01:11
'''