diff --git a/examples/dalle_gpt4v_agent.py b/examples/dalle_gpt4v_agent.py
index 3974f5d9b..2b54b18a0 100644
--- a/examples/dalle_gpt4v_agent.py
+++ b/examples/dalle_gpt4v_agent.py
@@ -16,11 +16,11 @@ import asyncio
 
 from PIL import Image
 
-from metagpt.roles.role import Role
 from metagpt.actions.action import Action
-from metagpt.utils.common import encode_image
-from metagpt.schema import Message
 from metagpt.logs import logger
+from metagpt.roles.role import Role
+from metagpt.schema import Message
+from metagpt.utils.common import encode_image
 
 
 class GenAndImproveImageAction(Action):
@@ -31,15 +31,19 @@ class GenAndImproveImageAction(Action):
         return imgs[0]
 
     async def refine_prompt(self, old_prompt: str, image: Image) -> str:
-        msg = f"You are a creative painter, with the given generated image and old prompt: {old_prompt}, " \
-              f"please refine the prompt and generate new one. Just output the new prompt."
+        msg = (
+            f"You are a creative painter, with the given generated image and old prompt: {old_prompt}, "
+            f"please refine the prompt and generate new one. Just output the new prompt."
+        )
         b64_img = encode_image(image)
         new_prompt = await self.llm.aask(msg=msg, images=[b64_img])
         return new_prompt
 
     async def evaluate_images(self, old_prompt: str, images: list[Image]) -> str:
-        msg = "With the prompt and two generated image, to judge if the second one is better than the first one. " \
-              "If so, just output True else output False"
+        msg = (
+            "With the prompt and two generated image, to judge if the second one is better than the first one. "
+            "If so, just output True else output False"
+        )
         b64_imgs = [encode_image(img) for img in images]
         res = await self.llm.aask(msg=msg, images=b64_imgs)
         return res
@@ -76,5 +80,6 @@ async def main():
     role = Painter()
     await role.run(with_message="a girl with flowers")
 
+
 if __name__ == "__main__":
     asyncio.run(main())