Update README.md

Update inference example

README.md

@@ -132,8 +132,15 @@ The curves show an increasing trend of stress with strain, indicating that the m
 Next we provide a convenience function for inference. This function takes the model, processor, question, and images, along with messages and images objects for repeated chat-like interactions with the model.
 
 ```python
+from transformers.image_utils import load_image
+
+def is_url_or_filename(val) -> bool:
+    # Check if it's a URL
+    if isinstance(val, str):
+        return True
+        
 def ask_about_image (model, processor, question, images_input=[],  verbatim=False,temperature=0.1,show_image=False,
-                     system="You are a materials scientist. ", init_instr = "", show_conversation=True,
+                     system="You are a materials scientist. ", show_conversation=True,
                      max_new_tokens=256, messages=[], images=[], use_Markdown=False):
     
     images_input=ensure_list(images_input)
@@ -141,7 +148,7 @@ def ask_about_image (model, processor, question, images_input=[],  verbatim=Fals
         if len (images_input)>0:
             for image in tqdm (images_input) :
                 if is_url(image):
-                    image= load_image(image)
+                    is_url_or_filename= load_image(image)
                 images.append (image)
                  
                 if show_image: