Weather.py 文件源码

def date_range_index(self, start, end=None, by=24):
        """ return a (list of) time sequence that allow indexing one or several time intervals between start and end every 'by' hours
        if end is None, only one time interval of 'by' hours is returned

        start and end are expected in local time
        """
        if end is None:
            seq = pandas.date_range(start=start, periods=by, freq='H',
                                    tz=self.timezone.zone)
            return seq.tz_convert('UTC')
        else:
            seq = pandas.date_range(start=start, end=end, freq='H',
                                    tz=self.timezone.zone)
            seq = seq.tz_convert('UTC')
            bins = pandas.date_range(start=start, end=end, freq=str(by) + 'H',
                                     tz=self.timezone.zone)
            bins = bins.tz_convert('UTC')
            return [seq[(seq >= bins[i]) & (seq < bins[i + 1])] for i in
                    range(len(bins) - 1)]