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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def load_series(self) -> None: """Load time series data as defined by the actual XML `reader` element. -0.298846, -0.811539, -2.493848 """

        kwargs = {}
        for keyword in ('flattennetcdf', 'isolatenetcdf', 'timeaxisnetcdf'):
            argument = getattr(hydpy.pub.options, keyword, None)
            if argument is not None:
                kwargs[keyword[:-6]] = argument
        hydpy.pub.sequencemanager.open_netcdf_reader(**kwargs)
        self.prepare_sequencemanager()
        for sequence in self._iterate_sequences():
            sequence.load_ext()
        hydpy.pub.sequencemanager.close_netcdf_reader()