Update app.py

app.py

@@ -26,7 +26,9 @@ def model_inference(
     if len(input_dict["files"]) > 1:
       images = [Image.open(image).convert("RGB") for image in input_dict["files"]]
     elif len(input_dict["files"]) == 1:
-      images = [Image.open(input_dict["files"][0]).convert("RGB")]        
+      images = [Image.open(input_dict["files"][0]).convert("RGB")]   
+    else:
+      images = []
     
 
     if text == "" and not images: