Output Module

Output	Output Methods.
SubcatchSeries	Get a subcatchment time series.
NodeSeries	Get a node time series.
LinkSeries	Get a link time series.
SystemSeries	Get a system time series.

Multiple pollutants

The subcatch_attributes, node_attributes, and link_attributes mappings include selectors for every pollutant in an output file. Their POLLUT_CONC_0, POLLUT_CONC_1, … indices correspond to the values in Output.pollutants. For example, to read each pollutant’s concentration at a link throughout a simulation:

from pyswmm import Output

with Output("model.out") as out:
    concentrations = {
        name: out.link_series(
            "C1", out.link_attributes["POLLUT_CONC_{}".format(index)]
        )
        for name, index in out.pollutants.items()
    }

The same selectors work with link_attribute to retrieve a pollutant’s concentration at all links for one report time. Use the corresponding mappings for subcatchment and node results. The subcatch_result, node_result, and link_result methods include every pollutant in their returned dictionaries.

The series helpers also expose the available pollutants. For a model with at least two pollutants, LinkSeries(out)["C1"].pollut_conc_1 returns the second pollutant’s time series; SubcatchSeries and NodeSeries work the same way.

Each output file has its own attribute mapping, so opening files with different pollutants does not alter the attributes available in another file. Existing swmm.toolkit.shared_enum selectors remain valid and retain their identities. Files without pollutants have no POLLUT_CONC_* entries, and accessing a missing pollutant through a series helper raises AttributeError.