TopKMetrics not showable on evidently ui dashboard

[CharlesCousyn]

In my project, I'm trying to set up a dashboard to display metrics for a search engine (ranking).

Here's a minimal example:

from evidently.ui.dashboards import DashboardPanelPlot, ReportFilter, PanelValue, PlotType, DashboardPanelCounter, CounterAgg
from evidently.renderers.html_widgets import WidgetSize
from evidently import ColumnMapping
from evidently import metrics
from evidently.ui.workspace import Workspace

from evidently.report import Report

#Create the workspace and project
ws = Workspace.create(path="./workspace_evidently")
project = ws.create_project("My test project")
project.save()

dataset = pd.DataFrame([
{
    "score": 0.5,
    "query": "my_query",
    "document_id": "docuemtn_id_1",
    "relevance": 0
},
{
    "score": 0.4,
    "query": "my_query",
    "document_id": "docuemtn_id_2",
    "relevance": 1
},
{
    "score": 0.3,
    "query": "my_query",
    "document_id": "docuemtn_id_5",
    "relevance": 0
},
{
    "score": 0.2,
    "query": "my_query",
    "document_id": "docuemtn_id_4",
    "relevance": 0
},
{
    "score": 0.1,
    "query": "my_query",
    "document_id": "docuemtn_id_3",
    "relevance": 1
}
])

report = Report(
    metrics=[
        metrics.MAPKMetric(4),
    ]
)

column_mapping = ColumnMapping(
    recommendations_type="score", target="relevance", prediction="score", item_id="document_id", user_id="query"
)
column_mapping.task = "recsys"
report.run(
    reference_data=None,
    current_data=dataset,
    column_mapping=column_mapping,
)
ws.add_report(project.id, report)

Let's add a dashboard like this:

project.dashboard.add_panel(
        DashboardPanelCounter(
            title="MAPKMetric",
            filter=ReportFilter(metadata_values={}, tag_values=[]),
            value=PanelValue(
                	metric_id="MAPKMetric",
                	field_path=metrics.MAPKMetric.fields.current,
                	legend="MAPKMetric",
                ),
            size=WidgetSize.HALF,
            agg=CounterAgg.SUM
        )
)
project.save()

If I now run evidently ui --workspace “./workspace_evidently” and go to the “Dashboard” page, I get the following error:

pydantic.v1.error_wrappers.ValidationError: 1 validation error for ParsingModel[float]
__root__
  value is not a valid float (type=type_error.float)

From what I understand, this is due to the fact that the TopKMetrics data are panda series showing the evolution of the metric with k ranging from 1 to 10 (useful for showing the curve). But it seems that, when building the Panel, there's no access to fetch the metric at the k I specified when creating my report metrics.MAPKMetric(4),. So, no float available when I do field_path=metrics.MAPKMetric.fields.... only a Series, which seems to broke the dashboard ui