def summaryForDate(date):
summarymap = {} # (channel, duration) -> count
reports = query.filterReportsForDateRange(date, date, [filterOnMetadata])
for report, metadict in reports:
key = (metadict['channel'], metadict['duration'])
if key in summarymap:
summarymap[key] += 1
else:
summarymap[key] = 1
return summarymap
