Update app.py

app.py

@@ -74,13 +74,14 @@ def app_function(input_json):
     result = dynamic_huff_model(df_distances, df_attractiveness, alpha, beta, df_capacity, df_population, iterations, crowding_threshold)
     
     # Convert the result DataFrame to a CSV string for Gradio output
-    return result.to_csv(index=False)
+    result_json = result.to_json(orient='split')
+    return json.loads(result_json)
 
 # Define the Gradio interface with a single JSON input
 iface = gr.Interface(
     fn=app_function,
-    inputs=gr.inputs.Textbox(label="Input JSON", lines=20, placeholder="Enter JSON with all parameters here..."),
-    outputs="file",
+    inputs=gr.Textbox(label="Input JSON", lines=20, placeholder="Enter JSON with all parameters here..."),
+    outputs=gr.JSON(label="Output JSON"),
     title="Dynamic Huff Model"
 )