print before adding :P python exception says that chart.id_chart.lastupdated is None.
On Sunday, November 11, 2012 11:20:04 PM UTC+1, Simon Carr wrote: > > so given this code then > > def refresh_charts(): > import datetime > charts = db(db.user_chart).select() > for chart in charts: > a = chart.id_chart.lastupdated > print chart.id_chart.lastupdated, a + datetime.timedelta(hours=5) > > why do I get an error saying > > TypeError: unsupported operand type(s) for +: 'NoneType' and > 'datetime.timedelta' > > > You can probably see what I am trying to do with the code above. How > should I do it? > > On Sunday, 11 November 2012 21:17:07 UTC, viniciusban wrote: >> >> Your myrecord.datetimevalue is already a python datetime.datetime field. >> >> >> On Sun, Nov 11, 2012 at 6:24 PM, Simon Carr <[email protected]> wrote: >> > What is the best way to create a python datetime object from a datetime >> > field. i.e >> > >> > import datetime >> > ... >> > my_date_time_object = datetime.datetime(myrecord.datetimevalue) >> > >> > Ultimately what I want to do is add x hours to a datetime value held in >> a >> > field and compare the new time to datetime.now to see if it is time for >> a >> > file to be updated. >> > >> > Thanks >> > Simon >> > >> > -- >> > >> > >> > >> > --
