def initialize(self, start, stop, step_seconds=86400):
self.start = format_date_time_sqlite(start)
self.stop = format_date_time_sqlite(stop)
step_seconds = int(step_seconds)
self.step_seconds = datetime.timedelta(seconds=step_seconds)
if (self.start.hour == 0 and
self.start.minute == 0 and
self.start.second == 0 and
step_seconds >= 86400):
self.format = '%Y-%m-%d'
elif (self.start.year == 1900 and
self.start.month == 1 and
self.start.day == 1 and
self.stop.year == 1900 and
self.stop.month == 1 and
self.stop.day == 1 and
step_seconds < 86400):
self.format = '%H:%M:%S'
else:
self.format = '%Y-%m-%d %H:%M:%S'
def step(self, value):
dt = format_date_time_sqlite(value)
if self._min is None or dt < self._min:
self._min = dt
if self._max is None or dt > self._max:
self._max = dt
def process(self, value):
return format_date_time_sqlite(value)
