Update imports_utils.py

imports_utils.py

@@ -248,7 +248,7 @@ def landusesToSubdomains(DistanceMatrix, LanduseDf, LanduseToSubdomainDict, Uniq
         for lu, lu_subdomain in LanduseToSubdomainDict.items():
             if lu_subdomain == subdomain:
                 if lu in LanduseDf.columns:
-                    if LanduseDf[lu] is not None:
+                    if LanduseDf[lu].notna().any(): 
                         df_LivabilitySubdomainsArea[subdomain] = df_LivabilitySubdomainsArea[subdomain].add(LanduseDf[lu], fill_value=0)
                     else:
                         print(f"Warning: Column '{lu}' not found in landuse database")