"made changes as requested by maintainer by setting variant, taxon, period to their first avaliable value else raise a error"

Author: blankirigaya

malariagen_data/anoph/frq_base.py

@@ -486,13 +486,11 @@ def plot_frequencies_map_markers(
         self,
         m,
         ds: frq_params.ds_frequencies_advanced,
-        variant: Optional[Union[int, str]],
+        variant: Union[int, str],
         taxon: str,
         period: pd.Period,
         clear: bool = True,
     ):
-        if variant is None:
-            return
         # Only import here because of some problems importing globally.
         import ipyleaflet  # type: ignore
         import ipywidgets  # type: ignore
@@ -598,13 +596,27 @@ def plot_frequencies_interactive_map(
         variants = ds["variant_label"].values
         taxa = ds["cohort_taxon"].to_pandas().dropna().unique()  # type: ignore
         periods = ds["cohort_period"].to_pandas().dropna().unique()  # type: ignore
+
+        if len(variants) == 0:
+            raise ValueError("No variants available in dataset.")
+        if len(taxa) == 0:
+            raise ValueError("No taxons available in dataset.")
+        if len(periods) == 0:
+            raise ValueError("No periods available in dataset.")
+
         controls = ipywidgets.interactive(
             self.plot_frequencies_map_markers,
             m=ipywidgets.fixed(freq_map),
             ds=ipywidgets.fixed(ds),
-            variant=ipywidgets.Dropdown(options=variants, description="Variant: "),
-            taxon=ipywidgets.Dropdown(options=taxa, description="Taxon: "),
-            period=ipywidgets.Dropdown(options=periods, description="Period: "),
+            variant=ipywidgets.Dropdown(
+                options=variants, value=variants[0], description="Variant: "
+            ),
+            taxon=ipywidgets.Dropdown(
+                options=taxa, value=taxa[0], description="Taxon: "
+            ),
+            period=ipywidgets.Dropdown(
+                options=periods, value=periods[0], description="Period: "
+            ),
             clear=ipywidgets.fixed(True),
         )