test caption is None

app.py

@@ -84,6 +84,7 @@ def process_image_and_caption(username_input, image, caption):
         gr.Warning("No image uploaded!", duration=5)
         return "No image uploaded!", image, caption
     print("here is cation" + caption)
+    print("here is cation type" + str(type(caption)))
     if caption is None:
         gr.Warning("No caption uploaded!", duration=5)
         return "No caption uploaded!", image, caption