diff --git a/src/chat/express/expression_learner.py b/src/chat/express/expression_learner.py
index a3d41a131..4139c65a5 100644
--- a/src/chat/express/expression_learner.py
+++ b/src/chat/express/expression_learner.py
@@ -2,7 +2,6 @@ import time
 import random
 import json
 import os
-import glob
 
 from typing import List, Dict, Optional, Any, Tuple
 
diff --git a/src/chat/express/expression_selector.py b/src/chat/express/expression_selector.py
index e2238a3a3..46f5b905b 100644
--- a/src/chat/express/expression_selector.py
+++ b/src/chat/express/expression_selector.py
@@ -1,5 +1,4 @@
 import json
-import os
 import time
 import random
 
@@ -139,7 +138,7 @@ class ExpressionSelector:
             key = (source_id, expr_type, situation, style)
             if key not in updates_by_key:
                 updates_by_key[key] = expr
-        for (chat_id, expr_type, situation, style), expr in updates_by_key.items():
+        for (chat_id, expr_type, situation, style), _expr in updates_by_key.items():
             query = Expression.select().where(
                 (Expression.chat_id == chat_id) &
                 (Expression.type == expr_type) &
diff --git a/src/main.py b/src/main.py
index 1fcc98e86..3dc8c4c9a 100644
--- a/src/main.py
+++ b/src/main.py
@@ -9,7 +9,6 @@ from src.chat.utils.statistic import OnlineTimeRecordTask, StatisticOutputTask
 from src.chat.emoji_system.emoji_manager import get_emoji_manager
 from src.chat.willing.willing_manager import get_willing_manager
 from src.chat.message_receive.chat_stream import get_chat_manager
-from src.chat.message_receive.storage import MessageStorage
 from src.config.config import global_config
 from src.chat.message_receive.bot import chat_bot
 from src.common.logger import get_logger