3b1755b2600a0a34a3be60df73cd1710ec8e20ce,nilmtk/metergroup.py,,combine_chunks_from_generators,#,1265

Before Change

        timeframe = timeframe.intersect(chunk_from_next_meter.timeframe)
        chunk = chunk.add(chunk_from_next_meter, fill_value=0, level="physical_quantity")

        if len(chunk) != len(chunk_from_next_meter):
            warn("Meters are not perfectly aligned.")

        // Update columns_to_average_counter
        physical_quantities = chunk_from_next_meter.columns.get_level_values("physical_quantity")
        columns_to_average = (set(PHYSICAL_QUANTITIES_TO_AVERAGE)
                              .intersection(physical_quantities))
        counter_increment = pd.DataFrame(1, columns=columns_to_average, 

After Change

        try:
            chunk = chunk.add(chunk_from_next_meter, fill_value=0)
        except ValueError as e:
            if str(e) != "cannot join with no level specified and no overlapping names":
                raise
            chunk = chunk.add(chunk_from_next_meter, fill_value=0, 
                              level="physical_quantity") 

        // Update columns_to_average_counter - this is necessary so we do not

Instances