def _datasetStartDay(self, dataset):
attrs = dict(dataset.attrs)
if 'start_day' in attrs: return attrs['start_day']
elif 'start_date' in attrs: return dateAsTuple(attrs['start_date'])[1:]
else: return self._fileStartDay()
def _datasetEndDay(self, dataset):
attrs = dict(dataset.attrs)
if 'end_day' in attrs: return attrs['end_day']
elif 'end_date' in attrs: return dateAsTuple(attrs['end_date'])[1:]
else: return self._fileEndDay()