Update app.py

app.py

@@ -59,8 +59,10 @@ custom_role_conversions=None,
 # Import tool from Hub
 image_generation_tool = load_tool("agents-course/text-to-image", trust_remote_code=True)
 
+import yaml
 with open("prompts.yaml", 'r') as stream:
     prompt_templates = yaml.safe_load(stream)
+
     
 agent = CodeAgent(
     model=model,