Modif clear function and comments

app.py

@@ -83,8 +83,8 @@ def query_image(image):
             predict.append(
                 {
                     # The list of coordinates of the points of the polygon.
-                    # Use np.asarray to change list to ndarray to turn int64 to int32 with np.ndarray.tolist
-                    "polygon": np.asarray(polygon["polygon"]).tolist(),
+                    # Cast to list of np.int32 to make it JSON-serializable
+                    "polygon": np.asarray(polygon["polygon"], dtype=np.int32).tolist(),
                     # Confidence that the model predicts the polygon in the right place
                     "confidence": polygon["confidence"],
                     # The channel on which the polygon is predicted
@@ -146,10 +146,10 @@ with gr.Blocks() as process_image:
                         # Generates a json with the model predictions
                         json_output = gr.JSON()
 
-    # Create the button to clear the inputs and outputs
+    # Clear button: set default values to inputs and output objects
     clear_button.click(
-        lambda x, y, z: (None, None, None),
-        inputs=[image, image_output, json_output],
+        lambda: (None, None, None),
+        inputs=[],
         outputs=[image, image_output, json_output],
     )