Timeseries(
    time_axis=TimeAxis(bounds=<Quantity([ 1. 10. 20.], 'year')>),
    timeseries_continuous=TimeseriesContinuous(
        name='piecewise_constant',
        time_units=<Unit('year')>,
        values_units=<Unit('megametric_ton / year')>,
        function=PPolyPiecewiseConstantPreviousLeftClosed(x=array([ 1., 10., 20.]), y=array([10., 12., 32.])),
        domain=(<Quantity(1.0, 'year')>, <Quantity(20.0, 'year')>)))
