diff --git a/examples/frontend/app.py b/examples/frontend/app.py
index 8654cc60..2d4ce496 100644
--- a/examples/frontend/app.py
+++ b/examples/frontend/app.py
@@ -2,9 +2,10 @@
 import sys
 
 import streamlit as st
-from codeinterpreterapi import File
 from utils import get_images  # type: ignore
 
+from codeinterpreterapi import File
+
 # Page configuration
 st.set_page_config(layout="wide")
 
diff --git a/examples/frontend/chainlitui.py b/examples/frontend/chainlitui.py
index 268dbe59..36b66f6c 100644
--- a/examples/frontend/chainlitui.py
+++ b/examples/frontend/chainlitui.py
@@ -1,4 +1,5 @@
 import chainlit as cl  # type: ignore
+
 from codeinterpreterapi import CodeInterpreterSession
 from codeinterpreterapi import File as CIFile
 
diff --git a/examples/frontend/utils.py b/examples/frontend/utils.py
index b33792df..e6c18c7c 100644
--- a/examples/frontend/utils.py
+++ b/examples/frontend/utils.py
@@ -4,6 +4,7 @@
 from typing import Optional
 
 import streamlit as st
+
 from codeinterpreterapi import CodeInterpreterSession
 
 
diff --git a/examples/use_additional_tools.py b/examples/use_additional_tools.py
index 96cf0915..d8c48bb7 100644
--- a/examples/use_additional_tools.py
+++ b/examples/use_additional_tools.py
@@ -4,13 +4,15 @@
 so it can download the bitcoin chart from yahoo finance
 and plot it for you
 """
+
 import csv
 import io
 from typing import Any
 
-from codeinterpreterapi import CodeInterpreterSession
 from langchain_core.tools import BaseTool
 
+from codeinterpreterapi import CodeInterpreterSession
+
 
 class ExampleKnowledgeBaseTool(BaseTool):
     name: str = "salary_database"
diff --git a/src/codeinterpreterapi/__init__.py b/src/codeinterpreterapi/__init__.py
index 2afd77d1..6c6061c3 100644
--- a/src/codeinterpreterapi/__init__.py
+++ b/src/codeinterpreterapi/__init__.py
@@ -1,9 +1,8 @@
-from . import _patch_parser  # noqa
-
 from codeinterpreterapi.config import settings
 from codeinterpreterapi.schema import File
 from codeinterpreterapi.session import CodeInterpreterSession
 
+from . import _patch_parser  # noqa
 
 __all__ = [
     "CodeInterpreterSession",
diff --git a/src/codeinterpreterapi/session.py b/src/codeinterpreterapi/session.py
index 6cf742a2..81f96a10 100644
--- a/src/codeinterpreterapi/session.py
+++ b/src/codeinterpreterapi/session.py
@@ -177,16 +177,18 @@ def _choose_agent(self) -> BaseSingleActionAgent:
                 ],
             )
             if isinstance(self.llm, ChatOpenAI) or isinstance(self.llm, AzureChatOpenAI)
-            else ConversationalChatAgent.from_llm_and_tools(
-                llm=self.llm,
-                tools=self.tools,
-                system_message=settings.SYSTEM_MESSAGE.content.__str__(),
-            )
-            if isinstance(self.llm, BaseChatModel)
-            else ConversationalAgent.from_llm_and_tools(
-                llm=self.llm,
-                tools=self.tools,
-                prefix=settings.SYSTEM_MESSAGE.content.__str__(),
+            else (
+                ConversationalChatAgent.from_llm_and_tools(
+                    llm=self.llm,
+                    tools=self.tools,
+                    system_message=settings.SYSTEM_MESSAGE.content.__str__(),
+                )
+                if isinstance(self.llm, BaseChatModel)
+                else ConversationalAgent.from_llm_and_tools(
+                    llm=self.llm,
+                    tools=self.tools,
+                    prefix=settings.SYSTEM_MESSAGE.content.__str__(),
+                )
             )
         )
 
@@ -194,17 +196,21 @@ def _history_backend(self) -> BaseChatMessageHistory:
         return (
             CodeBoxChatMessageHistory(codebox=self.codebox)
             if settings.HISTORY_BACKEND == "codebox"
-            else RedisChatMessageHistory(
-                session_id=str(self.session_id),
-                url=settings.REDIS_URL,
-            )
-            if settings.HISTORY_BACKEND == "redis"
-            else PostgresChatMessageHistory(
-                session_id=str(self.session_id),
-                connection_string=settings.POSTGRES_URL,
+            else (
+                RedisChatMessageHistory(
+                    session_id=str(self.session_id),
+                    url=settings.REDIS_URL,
+                )
+                if settings.HISTORY_BACKEND == "redis"
+                else (
+                    PostgresChatMessageHistory(
+                        session_id=str(self.session_id),
+                        connection_string=settings.POSTGRES_URL,
+                    )
+                    if settings.HISTORY_BACKEND == "postgres"
+                    else ChatMessageHistory()
+                )
             )
-            if settings.HISTORY_BACKEND == "postgres"
-            else ChatMessageHistory()
         )
 
     def _agent_executor(self) -> AgentExecutor:
diff --git a/tests/chain_test.py b/tests/chain_test.py
index bf301562..e655dd8d 100644
--- a/tests/chain_test.py
+++ b/tests/chain_test.py
@@ -1,12 +1,13 @@
 from asyncio import run as _await
 
+from langchain_openai import ChatOpenAI
+
 from codeinterpreterapi.chains import (
     aget_file_modifications,
     aremove_download_link,
     get_file_modifications,
     remove_download_link,
 )
-from langchain_openai import ChatOpenAI
 
 llm = ChatOpenAI(model="gpt-3.5-turbo")