diff --git a/uai/cmd/base_cmd.py b/uai/cmd/base_cmd.py
index d62b3f0..4eaed9b 100644
--- a/uai/cmd/base_cmd.py
+++ b/uai/cmd/base_cmd.py
@@ -296,7 +296,7 @@ def _cmd_common_request(self):
                                                      self.cmd_params)
         uai_logger.info("Call http request: {0} ".format(get_request(self.cmd_url, params=self.cmd_params)))
         r = requests.get(self.cmd_url, params=self.cmd_params)
-        self.rsp = json.loads(r.text, 'utf-8')
+        self.rsp = json.loads(r.text, encoding='utf-8')
         if self.rsp["RetCode"] != 0:
             uai_logger.error("{0} Fail: [{1}]{2}".format(self.cmd_params["Action"], self.rsp["RetCode"], self.rsp["Message"].encode('utf-8')))
             raise RuntimeError("{0} Fail: [{1}]{2}".format(self.cmd_params["Action"], self.rsp["RetCode"], self.rsp["Message"].encode('utf-8')))
@@ -304,36 +304,6 @@ def _cmd_common_request(self):
             del self.rsp['Action']
             uai_logger.info("{0} Success: {1}".format(self.cmd_params["Action"], get_response(self.rsp,0)))
 
-
-    # def _cmd_writefile_package(self, filepath):
-    #     if self.cmd_params.has_key('Signature'):
-    #         self.cmd_params.pop('Signature')
-    #     self.cmd_params['Signature'] = _verfy_ac(self.conf_params['private_key'],
-    #                                                  self.cmd_params)
-    #     uai_logger.info("Call http request: {0} ".format(get_request(self.cmd_url, params=self.cmd_params)))
-    #     r = requests.get(self.cmd_url, params=self.cmd_params)
-    #     rsp = json.loads(r.text, 'utf-8')
-    #     if rsp["RetCode"] != 0:
-    #         uai_logger.error("{0} Fail: [{1}]{2}".format(self.cmd_params["Action"], rsp["RetCode"], rsp["Message"].encode('utf-8')))
-    #         raise RuntimeError(
-    #             "{0} Fail: [{1}]{2}".format(self.cmd_params["Action"], rsp["RetCode"], rsp["Message"].encode('utf-8')))
-    #     else:
-    #         with open(filepath, 'w') as f:
-    #             json.dump(rsp["PkgSet"], f)
-
-
-    # def cmd(self, params):
-    #     """ Create the task of specified task id
-    #     """
-    #     self.conf_params = params
-    #     print "+++++in cmd func+++++"
-    #     print self.conf_params
-    #     if not self.conf_params:
-    #         print "HERE!"
-    #         self._load_args()
-    #     self._format_request_param()
-    #     self._cmd_request()
-
     def cmd(self):
         """ Create the task of specified task id
         """
diff --git a/uaitrain/api/base_op.py b/uaitrain/api/base_op.py
index 944e615..dad1f90 100644
--- a/uaitrain/api/base_op.py
+++ b/uaitrain/api/base_op.py
@@ -61,7 +61,7 @@ def __init__(self, action, pub_key, priv_key, project_id, region, zone):
         pass
 
     def _cmd_common_request(self):
-        if self.cmd_params.has_key('Signature'):
+        if ('Signature' in self.cmd_params) is True:
             self.cmd_params.pop('Signature')
         self.cmd_params['Signature'] = _verfy_ac(self.priv_key,
                                                  self.cmd_params)
@@ -69,7 +69,7 @@ def _cmd_common_request(self):
         uai_logger.info(self.cmd_params)
         uai_logger.info("Call http request: {0} ".format(get_request(self.cmd_url, params=self.cmd_params)))
         r = requests.get(self.cmd_url, params=self.cmd_params)
-        rsp = json.loads(r.text, 'utf-8')
+        rsp = json.loads(r.text, encoding='utf-8')
         if rsp['RetCode'] != 0:
             uai_logger.error("{0} Fail: [{1}]{2}".format(self.cmd_params[PARAM_ACTION], rsp['RetCode'],
                                                          rsp['Message'].encode('utf-8')))
diff --git a/uaitrain/cmd/base_cmd.py b/uaitrain/cmd/base_cmd.py
index d6b1e82..3dd3298 100644
--- a/uaitrain/cmd/base_cmd.py
+++ b/uaitrain/cmd/base_cmd.py
@@ -110,13 +110,13 @@ def _cmd_request(self):
              self._cmd_common_request()
 
     def _cmd_common_request(self):
-        if self.cmd_params.has_key('Signature'):
+        if ('Signature' in self.cmd_params) is True:
             self.cmd_params.pop('Signature')
         self.cmd_params['Signature'] = _verfy_ac(self.conf_params['private_key'],
                                                      self.cmd_params)
         uai_logger.info("Call http request: {0} ".format(get_request(self.cmd_url, params=self.cmd_params)))
         r = requests.get(self.cmd_url, params=self.cmd_params)
-        self.rsp = json.loads(r.text, 'utf-8')
+        self.rsp = json.loads(r.text, encoding='utf-8')
         if self.rsp["RetCode"] != 0:
             uai_logger.error("{0} Fail: [{1}]{2}".format(self.cmd_params["Action"], self.rsp["RetCode"], self.rsp["Message"].encode('utf-8')))
             raise RuntimeError("{0} Fail: [{1}]{2}".format(self.cmd_params["Action"], self.rsp["RetCode"], self.rsp["Message"].encode('utf-8')))
@@ -126,13 +126,13 @@ def _cmd_common_request(self):
 
 
     def _cmd_writefile_package(self, filepath):
-        if self.cmd_params.has_key('Signature'):
+        if ('Signature' in self.cmd_params) is True:
             self.cmd_params.pop('Signature')
         self.cmd_params['Signature'] = _verfy_ac(self.conf_params['private_key'],
                                                      self.cmd_params)
         uai_logger.info("Call http request: {0} ".format(get_request(self.cmd_url, params=self.cmd_params)))
         r = requests.get(self.cmd_url, params=self.cmd_params)
-        rsp = json.loads(r.text, 'utf-8')
+        rsp = json.loads(r.text, encoding='utf-8')
         if rsp["RetCode"] != 0:
             uai_logger.error("{0} Fail: [{1}]{2}".format(self.cmd_params["Action"], rsp["RetCode"], rsp["Message"].encode('utf-8')))
             raise RuntimeError(