refine python testcases.

tests/pytest/insert/basic.py

@@ -12,7 +12,6 @@
 # -*- coding: utf-8 -*-
 
 import sys
-import taos
 from util.log import *
 from util.cases import *
 from util.sql import *

tests/pytest/insert/float.py

@@ -13,9 +13,6 @@
 
 import sys
 import datetime
-
-import taos
-
 from util.log import *
 from util.cases import *
 from util.sql import *

tests/pytest/insert/int.py

@@ -12,7 +12,6 @@
 # -*- coding: utf-8 -*-
 
 import sys
-import taos
 import datetime
 
 from util.log import *

tests/pytest/util/cases.py

@@ -71,7 +71,7 @@ class TDCases:
                     case.run()
                 except Exception as e:
                     tdLog.notice(repr(e))
-                    tdLog.notice("%s failed: %s" % (__file__, fileName))
+                    tdLog.exit("%s failed: %s" % (__file__, fileName))
                 case.stop()
                 runNum += 1
                 continue