close_driver()和close_session()不切换模式

DrissionPage/drission.py

@@ -256,11 +256,13 @@ class Drission(object):
 
     def close_driver(self) -> None:
         """关闭driver和浏览器"""
+        if self._driver:
             self._driver.quit()
             self._driver = None
 
     def close_session(self) -> None:
         """关闭session"""
+        if self._session:
             self._session.close()
             self._session = None