Update app.py

app.py

@@ -127,9 +127,18 @@ def predict_sdg(text):
     # Return result
     return {top_prediction[0]: round(top_prediction[1], 3)}, fig
 
+# Define input and warning
+single_text = gr.Textbox(lines=7, label="Paste or type text here")
+if single_text != '':
+    single_text=single_text
+
+elif single_text == "":
+    single_text=gr.Warning('The model needs some text to return a prediction')
+ 
+
 # Create Gradio interface for single text
 iface2 = gr.Interface(fn=predict_sdg, 
-                      inputs=gr.Textbox(lines=7, label="Paste or type text here"), 
+                      inputs=single_text, 
                       outputs=[gr.Label(label="Top SDG Predicted", show_label=True), gr.Plot(label="Likelihood of all SDG", show_label=True)], 
                       title="Single Text Prediction")