[web2py] time field in DAL? when I retrieve it, it gives me as nontype instead of time type.

[Kenny]

I tried to compare by doing

{{=row.start_hour > request.now.time()}}<br/>

start_hour is defined as 'time'

error : 

TypeError: can't compare datetime.time to NoneType


How can I convert time field to be time type? so I can compare them. 


Also, one last question is how can I show times in different timezone? 
Do I need to use pypt?

thank you.