Group by interval time

[MRAB]

On 2015-02-12 12:34, charles.sartori at gmail.com wrote:
> Hello there!
>
> I`m trying to group by a list of Row() objects in 12days interval and sum(). values. Here is an example of the list
>
> [Row(time=datetime.datetime(2013, 1, 1, 0, 0), sum=4676557380615), Row(time=datetime.datetime(2013, 1, 2, 0, 0), sum=6549630855895), Row(time=datetime.datetime(2013, 1, 3, 0, 0), sum=6549630855895), ...]
>
> Row() objects has two vars: row.time and row.sum
>
>
> The result that I`m looking for is:
> [[datetime.datetime(2013, 1, 1, 0, 0), value],
> [datetime.datetime(2013, 1, 12, 0, 0), value],
> [datetime.datetime(2013, 1, 24, 0, 0), value]
> ]
> Where value is the sum() of all row.sum in that interval.
>
> I`m trying to use itertools.groupby by I could not get it to work yet.
>
Try grouping by the number of days since datetime.datetime(2013, 1, 1, 
0, 0), integer-divided by 12.