Update dbms.py code format3

Author: dill21yu

apps/beeswax/src/beeswax/server/dbms.py

@@ -15,11 +15,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import re
 import json
+import time
 import logging
-import re
 import threading
-import time
 from builtins import object
 
 from django.core.cache import caches
@@ -1048,7 +1048,6 @@ def create_table_as_a_select(self, request, query_history, target_database, targ
           LOG.exception('Failed to drop table "%s" as well: %s' % (target_table, double_trouble))
         raise ex
 
-
     return query_history
 
   def use(self, database, session=None):