add NullHandler

Author: wallisyan

aliyun-python-sdk-core/aliyunsdkcore/__init__.py

@@ -1,4 +1,11 @@
 __version__ = "2.12.1"
 
 import logging
-logging.getLogger('aliyunsdkcore').addHandler(logging.NullHandler())
+
+
+class NullHandler(logging.Handler):
+    def emit(self, record):
+        pass
+
+
+logging.getLogger('aliyunsdkcore').addHandler(NullHandler())