Summarizing data by week

[Mike Orr]

What's the best way to summarize data by week?  I have a set of
timestamped records, and I want a report with one row for each week in
the time period, including zero rows if there are weeks with no
activity.  I was planning to use ISO weeks because datetime has a
convenient .isocalendar() method, but I want each output row to have a
label like this:

    2006 week 5 (Feb)

However, to get the month (of the Thursday of that week) I have to
convert it back to an actual date,and I don't see a method to do that
in datetime or dateutil or mx.DateTime.

I was planning to use a dateutil.rrule to generate the weeks from the
minimum to maximum date, including any weeks that have no activity (so
they won't be in the dictionary).  But rrule sequences are based on an
actual start date, not an ISO week, so that won't work.  Unless perhaps
I take the minimum date and calculate the Thursday of that week, and
start from there.  Then all my conversions would be to iso_week rather
than from iso_week.

Is there a better way to do this?

--Mike