Update app.py

app.py

@@ -29,16 +29,17 @@ def generate(message, history, model, system_prompt,
     # history
     history_openai_format = [{"role": "system", "content": system_prompt}]
     for user, assistant in history:
-        if isinstance(user, tuple):  # there were files
-            mime_type = get_mimetype(filepath)
-            if not mime_type.contains('image'):
-                raise gr.Error("Momenteel zijn alleen afbeeldingen ondersteund als bijlagen 💥!", duration=5)
-            content = [
-                {"type": "image_url",
-                 # for some reason you don't get the same image format in history as in message
-                 "image_url": {"url": process_image({'path': filepath,
-                                                     'mime_type': mime_type})}}
-                for filepath in user]
+        if isinstance(user, tuple):  # there were 
+            content = []
+            for filepath in user:
+                mime_type = get_mimetype(filepath)
+                if not mime_type.contains('image'):
+                    raise gr.Error("Momenteel zijn alleen afbeeldingen ondersteund als bijlagen 💥!", duration=5)
+                content.append(
+                    {"type": "image_url",
+                     # for some reason you don't get the same image format in history as in message
+                     "image_url": {"url": process_image({'path': filepath,
+                                                         'mime_type': mime_type})}})
 
             history_openai_format.append(
                 {"role": "user", "content": content})