diff --git a/sqlor.egg-info/PKG-INFO b/sqlor.egg-info/PKG-INFO
index e341491..de94fac 100644
--- a/sqlor.egg-info/PKG-INFO
+++ b/sqlor.egg-info/PKG-INFO
@@ -9,6 +9,11 @@ Classifier: Operating System :: OS Independent
 Classifier: Programming Language :: Python :: 3
 Classifier: License :: OSI Approved :: MIT License
 Description-Content-Type: text/markdown
+Requires-Dist: aiomysql
+Requires-Dist: PyMySQL
+Requires-Dist: aiosqlite
+Requires-Dist: asyncio
+Requires-Dist: jinja2
 
 # SQLOR
 
diff --git a/sqlor/sor.py b/sqlor/sor.py
index 5c12db0..c486ce8 100755
--- a/sqlor/sor.py
+++ b/sqlor/sor.py
@@ -1,7 +1,6 @@
 from traceback import print_exc
 import os  
 import decimal
-from asyncio import coroutine
 os.environ['NLS_LANG'] = 'SIMPLIFIED CHINESE_CHINA.UTF8'
 import sys
 from datetime import datetime, date