pyupgrade changes for Python3.9+

As discussed at the Epoxy PTG meeting, run an automated
upgrade tool to make code python 3.9+ compliant.

Result of running:

$ pyupgrade --py39-plus $(git ls-files | grep ".py$")

Fixed PEP8 errors introduced by pyupgrade by running:

$ autopep8 --select=E127,E128,E501 --max-line-length 79 -r \
  --in-place neutron_taas

Also did manual updates as necessary to fix other errors
and warnings after above commands.

Inspired by Octavia and Nova [0].

[0] https://review.opendev.org/c/openstack/nova/+/896986

Change-Id: I14155656d7e233cdd0f8a30c34158465e8de325a

.pylintrc

@@ -32,7 +32,6 @@ disable=
  global-statement,
  keyword-arg-before-vararg,
  literal-comparison,
- non-parent-init-called,
  not-callable,
  protected-access,
  raise-missing-from,
@@ -80,7 +79,6 @@ disable=
 # new for python3 version of pylint
  consider-using-set-comprehension,
  unnecessary-pass,
- useless-object-inheritance
 
 [BASIC]
 # Variable names can be 1 to 31 characters long, with lowercase and underscores

doc/source/conf.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
@@ -42,8 +41,8 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = u'tap-as-a-service'
-copyright = u'2013, OpenStack Foundation'
+project = 'tap-as-a-service'
+copyright = '2013, OpenStack Foundation'
 
 # If true, '()' will be appended to :func: etc. cross-reference text.
 add_function_parentheses = True
@@ -72,8 +71,8 @@ htmlhelp_basename = '%sdoc' % project
 latex_documents = [
     ('index',
      'doc-tap-as-a-service.tex',
-     u'Tap as a Service Documentation',
-     u'OpenStack Foundation', 'manual'),
+     'Tap as a Service Documentation',
+     'OpenStack Foundation', 'manual'),
 ]
 
 # Example configuration for intersphinx: refer to the Python standard library.

neutron_taas/services/taas/agents/extensions/taas.py

@@ -34,7 +34,7 @@ OPTS = [
 cfg.CONF.register_opts(OPTS)
 
 
-class TaasAgentDriver(object, metaclass=abc.ABCMeta):
+class TaasAgentDriver(metaclass=abc.ABCMeta):
     """Defines stable abstract interface for TaaS Agent Driver."""
 
     @abc.abstractmethod

neutron_taas/services/taas/agents/taas_agent_api.py

@@ -17,7 +17,7 @@ from neutron_lib import rpc as n_rpc
 import oslo_messaging as messaging
 
 
-class TaasPluginApiMixin(object):
+class TaasPluginApiMixin:
 
     # Currently there are no Calls the Agent makes towards the Plugin.
 
@@ -28,7 +28,7 @@ class TaasPluginApiMixin(object):
         super().__init__()
 
 
-class TaasAgentRpcCallbackMixin(object):
+class TaasAgentRpcCallbackMixin:
     """Mixin for Taas agent Implementations."""
 
     def __init__(self):

neutron_taas/services/taas/drivers/linux/ovs_taas.py

@@ -401,7 +401,7 @@ class OvsTaasDriver(taas_base.TaasAgentDriver):
                 )
 
             else:
-                actions = "output:%s,mod_vlan_vid:%s,output:%s" % (
+                actions = "output:{},mod_vlan_vid:{},output:{}".format(
                     str(ovs_port_id), str(taas_id), str(patch_int_tap_id)
                 )
                 if network_type == 'vlan':

neutron_taas/services/taas/drivers/linux/ovs_utils.py

@@ -22,7 +22,7 @@
 # - A value may be affiliated with multiple keys.
 # - A value may be affiliated with a key multiple times.
 #
-class key_value_mgr(object):
+class key_value_mgr:
     #
     # Initializes internal state for specified # keys
     #

neutron_taas/services/taas/drivers/linux/sriov_nic_utils.py

@@ -30,7 +30,7 @@ import re
 LOG = logging.getLogger(__name__)
 
 
-class SriovNicUtils(object):
+class SriovNicUtils:
     #
     # Initializes internal state for specified # keys
     #
@@ -169,7 +169,7 @@ class SriovNicUtils(object):
             with open(addr_file, encoding="utf-8") as f:
                 mac = next(f).strip()
                 return mac
-        except (IOError, StopIteration) as e:
+        except (OSError, StopIteration) as e:
             LOG.warning("Could not find the expected sysfs file for "
                         "determining the MAC address of the PCI device "
                         "%(addr)s. May not be a NIC. Error: %(e)s",

neutron_taas/services/taas/service_drivers/__init__.py

@@ -15,7 +15,7 @@
 import abc
 
 
-class TaasBaseDriver(object, metaclass=abc.ABCMeta):
+class TaasBaseDriver(metaclass=abc.ABCMeta):
 
     def __init__(self, service_plugin):
         self.service_plugin = service_plugin

neutron_taas/services/taas/service_drivers/service_driver_context.py

@@ -19,7 +19,7 @@ from oslo_log import log
 LOG = log.getLogger(__name__)
 
 
-class ServiceDriverContext(object):
+class ServiceDriverContext:
     """ServiceDriverContext context base class"""
     def __init__(self, service_plugin, plugin_context):
         self._plugin = service_plugin

neutron_taas/services/taas/service_drivers/taas_agent_api.py

@@ -21,7 +21,7 @@ import oslo_messaging as messaging
 LOG = logging.getLogger(__name__)
 
 
-class TaasAgentApi(object):
+class TaasAgentApi:
     """RPC calls to agent APIs"""
 
     def __init__(self, topic, host):

neutron_taas/services/taas/service_drivers/taas_rpc.py

@@ -36,7 +36,7 @@ from oslo_utils import excutils
 LOG = logging.getLogger(__name__)
 
 
-class TaasCallbacks(object):
+class TaasCallbacks:
 
     def __init__(self, rpc_driver, plugin):
         super().__init__()

neutron_taas/tests/unit/db/test_taas_db.py

@@ -33,7 +33,7 @@ class TaaSDbTestCase(testlib_api.SqlTestCase):
     """Unit test for TaaS DB support."""
 
     def setUp(self):
-        super(TaaSDbTestCase, self).setUp()
+        super().setUp()
         self.ctx = context.get_admin_context()
         self.mixin = taas_db.Taas_db_Mixin()
         self.plugin = importutils.import_object(DB_PLUGIN_KLAAS)

neutron_taas/tests/unit/extensions/test_taas.py

@@ -38,12 +38,12 @@ class TaasExtensionTestCase(test_extensions_base.ExtensionTestCase):
     def setUp(self):
         conf_common.register_core_common_config_opts()
         extensions.append_api_extensions_path(taas_extensions.__path__)
-        super(TaasExtensionTestCase, self).setUp()
+        super().setUp()
         plural_mappings = {'tap_service': 'tap_services',
                            'tap_flow': 'tap_flows'}
         self.setup_extension(
-            '%s.%s' % (taas_extensions.taas.TaasPluginBase.__module__,
-                       taas_extensions.taas.TaasPluginBase.__name__),
+            '{}.{}'.format(taas_extensions.taas.TaasPluginBase.__module__,
+                           taas_extensions.taas.TaasPluginBase.__name__),
             taas_api.ALIAS,
             taas_extensions.taas.Taas,
             'taas',

neutron_taas/tests/unit/extensions/test_vlan_filter.py

@@ -34,14 +34,13 @@ _get_path = test_api_v2._get_path
 class VlanFilterExtensionTestCase(test_taas_ext.TaasExtensionTestCase):
 
     def setUp(self):
-        super(VlanFilterExtensionTestCase, self).setUp()
+        super().setUp()
         attr_map = taas_api_def.RESOURCE_ATTRIBUTE_MAP
         attr_map['tap_flows'].update(
             vlan_filter_ext.RESOURCE_ATTRIBUTE_MAP['tap_flows'])
 
     def _get_expected_tap_flow(self, data):
-        ret = super(VlanFilterExtensionTestCase,
-                    self)._get_expected_tap_flow(data)
+        ret = super()._get_expected_tap_flow(data)
         ret['tap_flow'].update(
             vlan_filter=data['tap_flow'].get('vlan_filter', None))
         return ret

neutron_taas/tests/unit/services/drivers/test_linux_sriov_nic_driver.py

@@ -39,7 +39,7 @@ FAKE_TAP_FLOW = {'port': FAKE_TAP_SERVICE['port'],
 
 class TestSriovNicTaas(base.TaasTestCase):
     def setUp(self):
-        super(TestSriovNicTaas, self).setUp()
+        super().setUp()
 
     @mock.patch.object(sriov_nic_taas, 'sriov_utils')
     def test_create_tap_service(self, mock_sriov_utils):

neutron_taas/tests/unit/services/drivers/test_linux_sriov_utils.py

@@ -36,7 +36,7 @@ FAKE_SRIOV_PORT = {
 
 class TestSriovNicUtils(base.TaasTestCase):
     def setUp(self):
-        super(TestSriovNicUtils, self).setUp()
+        super().setUp()
 
     def test_get_sysfs_netdev_path_with_pf_interface(self):
         self.assertEqual(

neutron_taas/tests/unit/services/taas/test_taas_plugin.py

@@ -40,7 +40,7 @@ class DummyError(Exception):
 
 class TestTaasPlugin(testlib_api.SqlTestCase):
     def setUp(self):
-        super(TestTaasPlugin, self).setUp()
+        super().setUp()
         mock.patch.object(n_rpc, 'Connection', spec=object).start()
         mock.patch.object(taas_agent_api,
                           'TaasAgentApi', spec=object).start()
@@ -162,8 +162,8 @@ class TestTaasPlugin(testlib_api.SqlTestCase):
                 self._context, ts_id_1)
             tap_id_assoc_2 = self._plugin.create_tap_id_association(
                 self._context, ts_id_2)
-            self.assertEqual(set([1, 2]), set([tap_id_assoc_1['taas_id'],
-                             tap_id_assoc_2['taas_id']]))
+            self.assertEqual({1, 2}, {tap_id_assoc_1['taas_id'],
+                             tap_id_assoc_2['taas_id']})
             with testtools.ExpectedException(taas_exc.TapServiceLimitReached):
                 self._plugin.create_tap_id_association(
                     self._context,
@@ -177,8 +177,8 @@ class TestTaasPlugin(testlib_api.SqlTestCase):
                                                  "dummyHost")
             tap_id_assoc_3 = self._plugin.create_tap_id_association(
                 self._context, ts_id_3)
-            self.assertEqual(set([1, 2]), set([tap_id_assoc_3['taas_id'],
-                             tap_id_assoc_2['taas_id']]))
+            self.assertEqual({1, 2}, {tap_id_assoc_3['taas_id'],
+                             tap_id_assoc_2['taas_id']})
 
     def test_create_tap_service_wrong_tenant_id(self):
         self._port_details['tenant_id'] = 'other-tenant'

neutron_taas/tests/unit/taas_client/osc/fakes.py

@@ -17,7 +17,7 @@ import copy
 from oslo_utils import uuidutils
 
 
-class FakeTapService(object):
+class FakeTapService:
 
     @staticmethod
     def create_tap_service(attrs=None):
@@ -48,7 +48,7 @@ class FakeTapService(object):
         return tap_services
 
 
-class FakeTapFlow(object):
+class FakeTapFlow:
 
     @staticmethod
     def create_tap_flow(attrs=None):

neutron_taas/tests/unit/taas_client/osc/test_osc_tap_flow.py

@@ -54,7 +54,7 @@ class TestCreateTapFlow(test_fakes.TestNeutronClientOSCV2):
     )
 
     def setUp(self):
-        super(TestCreateTapFlow, self).setUp()
+        super().setUp()
         self.cmd = osc_tap_flow.CreateTapFlow(self.app, self.namespace)
 
     def test_create_tap_flow(self):
@@ -117,7 +117,7 @@ class TestCreateTapFlow(test_fakes.TestNeutronClientOSCV2):
 
 class TestListTapFlow(test_fakes.TestNeutronClientOSCV2):
     def setUp(self):
-        super(TestListTapFlow, self).setUp()
+        super().setUp()
         self.cmd = osc_tap_flow.ListTapFlow(self.app, self.namespace)
 
     def test_list_tap_flows(self):
@@ -149,7 +149,7 @@ class TestListTapFlow(test_fakes.TestNeutronClientOSCV2):
 
 class TestDeleteTapFlow(test_fakes.TestNeutronClientOSCV2):
     def setUp(self):
-        super(TestDeleteTapFlow, self).setUp()
+        super().setUp()
         self.app.client_manager.network = mock.Mock()
         self.app.client_manager.network.find_tap_flow = mock.Mock(
             side_effect=lambda name_or_id, ignore_missing:
@@ -194,7 +194,7 @@ class TestShowTapFlow(test_fakes.TestNeutronClientOSCV2):
     )
 
     def setUp(self):
-        super(TestShowTapFlow, self).setUp()
+        super().setUp()
         self.app.client_manager.network = mock.Mock()
         self.app.client_manager.network.find_tap_flow = mock.Mock(
             side_effect=lambda name_or_id, ignore_missing:
@@ -246,7 +246,7 @@ class TestUpdateTapFlow(test_fakes.TestNeutronClientOSCV2):
     )
 
     def setUp(self):
-        super(TestUpdateTapFlow, self).setUp()
+        super().setUp()
         self.cmd = osc_tap_flow.UpdateTapFlow(self.app, self.namespace)
         self.app.client_manager.network = mock.Mock()
         self.app.client_manager.network.find_tap_flow = mock.Mock(

neutron_taas/tests/unit/taas_client/osc/test_osc_tap_service.py

@@ -51,7 +51,7 @@ class TestCreateTapService(test_fakes.TestNeutronClientOSCV2):
     )
 
     def setUp(self):
-        super(TestCreateTapService, self).setUp()
+        super().setUp()
         self.cmd = osc_tap_service.CreateTapService(self.app, self.namespace)
 
     def test_create_tap_service(self):
@@ -95,7 +95,7 @@ class TestCreateTapService(test_fakes.TestNeutronClientOSCV2):
 
 class TestListTapService(test_fakes.TestNeutronClientOSCV2):
     def setUp(self):
-        super(TestListTapService, self).setUp()
+        super().setUp()
         self.cmd = osc_tap_service.ListTapService(self.app, self.namespace)
 
     def test_list_tap_service(self):
@@ -125,7 +125,7 @@ class TestListTapService(test_fakes.TestNeutronClientOSCV2):
 
 class TestDeleteTapService(test_fakes.TestNeutronClientOSCV2):
     def setUp(self):
-        super(TestDeleteTapService, self).setUp()
+        super().setUp()
         self.app.client_manager.network = mock.Mock()
         self.app.client_manager.network.find_tap_service = mock.Mock(
             side_effect=lambda name_or_id, ignore_missing:
@@ -164,7 +164,7 @@ class TestShowTapService(test_fakes.TestNeutronClientOSCV2):
     )
 
     def setUp(self):
-        super(TestShowTapService, self).setUp()
+        super().setUp()
         self.app.client_manager.network = mock.Mock()
         self.app.client_manager.network.find_tap_service = mock.Mock(
             side_effect=lambda name_or_id, ignore_missing:
@@ -212,7 +212,7 @@ class TestUpdateTapService(test_fakes.TestNeutronClientOSCV2):
     )
 
     def setUp(self):
-        super(TestUpdateTapService, self).setUp()
+        super().setUp()
         self.cmd = osc_tap_service.UpdateTapService(self.app, self.namespace)
         self.app.client_manager.network = mock.Mock()
         self.app.client_manager.network.find_tap_service = mock.Mock(

releasenotes/source/conf.py

@@ -59,9 +59,9 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = u'tap-as-a-service'
-copyright = u'2017, Tap-as-a-service developers'
-author = u'Tap-as-a-service developers'
+project = 'tap-as-a-service'
+copyright = '2017, Tap-as-a-service developers'
+author = 'Tap-as-a-service developers'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
@@ -247,8 +247,8 @@ latex_elements = {
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
-    (master_doc, 'tap-as-a-service.tex', u'tap-as-a-service Documentation',
-     u'OpenStack', 'manual'),
+    (master_doc, 'tap-as-a-service.tex', 'tap-as-a-service Documentation',
+     'OpenStack', 'manual'),
 ]
 
 # The name of an image file (relative to this directory) to place at the top of
@@ -277,7 +277,7 @@ latex_documents = [
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
 man_pages = [
-    (master_doc, 'tap-as-a-service', u'tap-as-a-service Documentation',
+    (master_doc, 'tap-as-a-service', 'tap-as-a-service Documentation',
      [author], 1)
 ]
 
@@ -291,7 +291,7 @@ man_pages = [
 # (source start file, target name, title, author,
 #  dir menu entry, description, category)
 texinfo_documents = [
-    (master_doc, 'tap-as-a-service', u'tap-as-a-service Documentation',
+    (master_doc, 'tap-as-a-service', 'tap-as-a-service Documentation',
      author, 'tap-as-a-service', 'One line description of project.',
      'Miscellaneous'),
 ]