diff --git a/docs/en/samples/pre_post_processing/python/langchain/agent.py b/docs/en/samples/pre_post_processing/python/langchain/agent.py
index 5e174943a7..db1f0e0ad3 100644
--- a/docs/en/samples/pre_post_processing/python/langchain/agent.py
+++ b/docs/en/samples/pre_post_processing/python/langchain/agent.py
@@ -17,7 +17,6 @@ system_prompt = """
   Don't ask for confirmations from the user.
 """
 
-
 # Pre processing
 @wrap_tool_call
 async def enforce_business_rules(request, handler):