Allow meteonorm_filename to be None

src/simstadt/workflows.py

@@ -13,8 +13,11 @@ from .utils import remove_random_id, set_random_seed
 BUNDLED_TEMPLATES = Path(__file__).parent / "templates"
 
 
-def _set_weather_file(meteonorm_filename: str) -> dict[str, str]:
+def _set_weather_file(meteonorm_filename: str | None) -> dict[str, str]:
     """Build the params.xml replacement for the weather file."""
+    if meteonorm_filename is None:
+        # No meteonorm file has been specified, fall back to PVGIS
+        return {"<string>TMY3_HOURLY_FILE</string>": "<string>PVGIS_DATABASE</string>"}
     return {
         "<string>METEONORM_FILE</string>": f"<string>{Path(meteonorm_filename).name}</string>"
     }
@@ -33,7 +36,7 @@ def _set_refurbishment(geg_ratio: float) -> dict[str, str]:
 
 def photovoltaic_simulation(
     citygml_path: Path | str,
-    meteonorm_filename: str,
+    meteonorm_filename: str | None = None,
     roof_percentage: float = 100.0,
     pv_share_flat: float = 40,
     pv_share_tilted: float = 50,
@@ -79,7 +82,7 @@ def photovoltaic_simulation(
 
 def heatdemand_simulation(
     citygml_path: Path | str,
-    meteonorm_filename: str,
+    meteonorm_filename: str | None = None,
     with_shadows: bool = True,
     calculation_mode: str = "HEATING",
     refurbishment_ratio: float = 0.0,