Update assistants.py

assistants.py

@@ -161,11 +161,14 @@ def execute_tool_calls(run_steps):
     for step in run_steps.data:
         step_details = step.step_details
         print(get_json("step_details", step_details))
-        gr.Info(f"{step_details.type} {get_json('usage', step.usage)}", duration=30)
+
+        if step.usage:
+            gr.Info(f"{step_details.type} {get_json('usage', step.usage)}", duration=30)
         
         if hasattr(step_details, "tool_calls"):
             for tool_call in step_details.tool_calls:
                 print(get_json("tool_call", tool_call))
+                
                 gr.Info(get_json("tool_call", tool_call), duration=30)
                 
                 if hasattr(tool_call, "function"):