Remove usage of six

Remove six-library Replace the following items with Python 3 style code.
- six.reraise
- six.assertCountEqual
- six.iteritems
- six.next
- six.itervalues

Change-Id: Id5d7e1e75498af7e0551a52a5b2836339748b064

tempest/api/compute/servers/test_server_tags.py

@@ -13,8 +13,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import six
-
 from tempest.api.compute import base
 from tempest.common import utils
 from tempest.lib.common.utils import data_utils
@@ -84,11 +82,11 @@ class ServerTagsTestJSON(base.BaseV2ComputeTest):
         new_tags = [data_utils.rand_name('tag'), data_utils.rand_name('tag')]
         replaced_tags = self.client.update_all_tags(
             self.server['id'], new_tags)['tags']
-        six.assertCountEqual(self, new_tags, replaced_tags)
+        self.assertCountEqual(new_tags, replaced_tags)
 
         # List the tags and check that the tags were replaced.
         fetched_tags = self.client.list_tags(self.server['id'])['tags']
-        six.assertCountEqual(self, new_tags, fetched_tags)
+        self.assertCountEqual(new_tags, fetched_tags)
 
     @decorators.idempotent_id('a63b2a74-e918-4b7c-bcab-10c855f3a57e')
     def test_delete_all_tags(self):

tempest/api/network/test_allowed_address_pair.py

@@ -13,8 +13,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import six
-
 from tempest.api.network import base
 from tempest.common import utils
 from tempest.lib.common.utils import data_utils
@@ -99,8 +97,7 @@ class AllowedAddressPairTestJSON(base.BaseNetworkTest):
         body = self.ports_client.update_port(
             port_id, allowed_address_pairs=allowed_address_pairs)
         allowed_address_pair = body['port']['allowed_address_pairs']
-        six.assertCountEqual(self, allowed_address_pair,
-                             allowed_address_pairs)
+        self.assertCountEqual(allowed_address_pair, allowed_address_pairs)
 
     @decorators.idempotent_id('9599b337-272c-47fd-b3cf-509414414ac4')
     def test_update_port_with_address_pair(self):

tempest/api/network/test_networks.py

@@ -13,7 +13,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 import netaddr
-import six
 import testtools
 
 from tempest.api.network import base
@@ -595,7 +594,7 @@ class NetworksIpV6Test(NetworksTest):
         subnets = [sub['id'] for sub in body['subnets']
                    if sub['network_id'] == network['id']]
         test_subnet_ids = [sub['id'] for sub in (subnet1, subnet2)]
-        six.assertCountEqual(self, subnets,
+        self.assertCountEqual(subnets,
                               test_subnet_ids,
                               'Subnet are not in the same network')
 

tempest/api/volume/admin/test_multi_backend.py

@@ -10,7 +10,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import six
 from tempest.api.volume import base
 from tempest.common import waiters
 from tempest import config
@@ -149,4 +148,4 @@ class VolumeMultiBackendTest(base.BaseVolumeAdminTest):
         # assert that volumes are each created on separate hosts:
         msg = ("volumes %s were created in the same backend" % ", "
                .join(volume_hosts))
-        six.assertCountEqual(self, volume_hosts, set(volume_hosts), msg)
+        self.assertCountEqual(volume_hosts, set(volume_hosts), msg)

tempest/lib/common/dynamic_creds.py

@@ -16,7 +16,6 @@ import ipaddress
 
 import netaddr
 from oslo_log import log as logging
-import six
 
 from tempest.lib.common import cred_client
 from tempest.lib.common import cred_provider
@@ -556,7 +555,7 @@ class DynamicCredentialProvider(cred_provider.CredentialProvider):
         if not self._creds:
             return
         self._clear_isolated_net_resources()
-        for creds in six.itervalues(self._creds):
+        for creds in self._creds.values():
             try:
                 self.creds_client.delete_user(creds.user_id)
             except lib_exc.NotFound:

tempest/lib/common/rest_client.py

@@ -24,7 +24,6 @@ import jsonschema
 from oslo_log import log as logging
 from oslo_log import versionutils
 from oslo_serialization import jsonutils as json
-import six
 
 from tempest.lib.common import http
 from tempest.lib.common import jsonschema_validator
@@ -509,7 +508,7 @@ class RestClient(object):
             if not hasattr(body, "keys") or len(body.keys()) != 1:
                 return body
             # Just return the "wrapped" element
-            _, first_item = six.next(six.iteritems(body))
+            _, first_item = tuple(body.items())[0]
             if isinstance(first_item, (dict, list)):
                 return first_item
         except (ValueError, IndexError):

tempest/lib/common/utils/linux/remote_client.py

@@ -15,7 +15,6 @@ import sys
 
 import netaddr
 from oslo_log import log as logging
-import six
 
 from tempest.lib.common import ssh
 from tempest.lib.common.utils import test_utils
@@ -55,8 +54,8 @@ def debug_ssh(function):
                             except Exception:
                                 msg = 'Could not get console_log for server %s'
                                 LOG.debug(msg, self.server['id'])
-                    # re-raise the original ssh timeout exception
-                    six.reraise(*original_exception)
+                    # raise the original ssh timeout exception
+                    raise
                 finally:
                     # Delete the traceback to avoid circular references
                     _, _, trace = original_exception

tempest/test.py

@@ -20,7 +20,6 @@ import sys
 import debtcollector.moves
 import fixtures
 from oslo_log import log as logging
-import six
 import testtools
 
 from tempest import clients
@@ -179,7 +178,7 @@ class BaseTestCase(testtools.testcase.WithAttributes,
                      etype, cls.__name__)
             cls.tearDownClass()
             try:
-                six.reraise(etype, value, trace)
+                raise value.with_traceback(trace)
             finally:
                 del trace  # to avoid circular refs
         finally:
@@ -233,7 +232,7 @@ class BaseTestCase(testtools.testcase.WithAttributes,
         # the first one
         if re_raise and etype is not None:
             try:
-                six.reraise(etype, value, trace)
+                raise value.with_traceback(trace)
             finally:
                 del trace  # to avoid circular refs
 

tempest/tests/lib/common/test_rest_client.py

@@ -17,7 +17,6 @@ import copy
 import fixtures
 import jsonschema
 from oslo_serialization import jsonutils as json
-import six
 
 from tempest.lib.common import http
 from tempest.lib.common import rest_client
@@ -93,7 +92,7 @@ class TestRestClientNotFoundHandling(BaseRestClientTestClass):
 class TestRestClientHeadersJSON(TestRestClientHTTPMethods):
 
     def _verify_headers(self, resp):
-        resp = dict((k.lower(), v) for k, v in six.iteritems(resp))
+        resp = dict((k.lower(), v) for k, v in resp.items())
         self.assertEqual(self.header_value, resp['accept'])
         self.assertEqual(self.header_value, resp['content-type'])
 

tempest/tests/lib/services/test_clients.py

@@ -16,7 +16,6 @@ import types
 from unittest import mock
 
 import fixtures
-import six
 import testtools
 
 from tempest.lib import auth
@@ -270,8 +269,7 @@ class TestServiceClients(base.TestCase):
                           'module_path': 'This neither',
                           'client_names': ['SomeClient1']}]}
         msg = "(?=.*{0})(?=.*{1})".format(
-            *[x[1][0]['module_path'] for x in six.iteritems(
-                fake_service_clients)])
+            *[x[1][0]['module_path'] for x in fake_service_clients.items()])
         self.useFixture(fixtures.MockPatchObject(
             clients.ClientsRegistry(), 'get_service_clients',
             return_value=fake_service_clients))
@@ -300,8 +298,8 @@ class TestServiceClients(base.TestCase):
                           'module_path': 'fake_path_2',
                           'client_names': ['SomeClient2']}]}
         msg = "(?=.*{0})(?=.*{1})".format(
-            *[x[1][0]['service_version'] for x in six.iteritems(
-                fake_service_clients)])
+            *[x[1][0]['service_version'] for x in
+                fake_service_clients.items()])
         self.useFixture(fixtures.MockPatchObject(
             clients.ClientsRegistry(), 'get_service_clients',
             return_value=fake_service_clients))