[Tutor] Time module

[Norman Khine]

Hello,
I am having difficulties in converting the following to display the 
difference that has passed in hours and seconds in a nice way.

from datetime import datetime
now = datetime.now()
posted = date
difference = now - posted

namespace['date'] = date
namespace['posted'] = difference

when I look at the 'posted' namespace I get

23:08:31.454767

What is the best way to split this so that it will show

'23h 08m 31s' ago

or

1d 23h 08m 31s ago

etc..

Thanks