Update session.py

Author: beacoder

python_agent_harness/session.py

@@ -676,9 +676,11 @@ def _conversation_text(self, messages: list) -> str:
                 image_count = sum(1 for p in m.content if isinstance(p, ImagePart))
                 if image_count:
                     sources = [
-                        p.path or p.url
+                        loc
                         for p in m.content
-                        if isinstance(p, ImagePart) and (p.path or p.url)
+                        if isinstance(p, ImagePart)
+                        for loc in (p.path or p.url,)
+                        if loc
                     ]
                     body = f"{image_placeholder(image_count, sources)}\n{body}"
             if m.role == "assistant" and m.tool_calls: