add error if irradiation data is incomplete

pvlib · wholmgren · Oct 18, 2016 · Sep 1, 2016 · Sep 1, 2016 · Sep 8, 2016
commit 326dc11dfbeaf401e6586ebd6ae50e4b969e5cc6
diff --git a/pvlib/modelchain.py b/pvlib/modelchain.py
@@ -711,6 +711,10 @@ def prepare_inputs(self, times, irradiance=None, weather=None):
                zenith_data=self.solar_position['apparent_zenith'],
                airmass_data=self.airmass['airmass_absolute'])

+        if not {'ghi', 'dni', 'dhi'} <= set(self.weather.columns):
+            ValueError(
+                "Uncompleted irradiance data set. Please check you input data")
+
        # PVSystem.get_irradiance and SingleAxisTracker.get_irradiance
        # have different method signatures, so use partial to handle
        # the differences.