Update app.py

app.py

@@ -492,10 +492,22 @@ if uploaded_file is not None:
 
                 # Nach Annuität sortieren und Ergebnisse eintragen
                 df_sorted = df_berechnung.sort_values("Annuität")
+                df_sorted["Annuität"] = pd.to_numeric(df_sorted["Annuität"], errors="coerce")  # explizit konvertieren
+                
+                st.write(df_sorted[["Name", "Annuität"]])  # zum Debuggging
+                
                 for i in range(min(8, len(df_sorted))):
-                    csv_data.loc[index, f"Heizsystem{i+1}"] = df_sorted["Name"].iloc[i]
-                    annuitaet = df_sorted["Annuität"].iloc[i]
-                    csv_data.loc[index, f"Annuität{i+1}"] = float(annuitaet)
+                    system_name = df_sorted["Name"].iloc[i]
+                    annuitaet_raw = df_sorted["Annuität"].iloc[i]
+                    try:
+                        if pd.isna(annuitaet_raw):
+                            annuitaet = ""
+                        else:
+                            annuitaet = float(annuitaet_raw)
+                    except:
+                        annuitaet = ""
+                    csv_data.loc[index, f"Heizsystem{i+1}"] = system_name
+                    csv_data.loc[index, f"Annuität{i+1}"] = annuitaet
 
             except Exception as e:
                 st.error(f"Fehler bei Objekt-ID {index}: {e}")