Remove six

Replace the following items with Python 3 style code.

- six.next
- six.text_type
- six.add_metaclass
- six.moves

Implements: blueprint six-removal

Change-Id: Id572aec8a6fda7676eb03d17c66fd33f9801f25d

blazar/api/app.py

@@ -14,7 +14,6 @@
 # limitations under the License.
 
 from oslo_serialization import jsonutils
-import six
 
 from blazar.api.v1 import app as v1_app
 from blazar.api.v2 import app as v2_app
@@ -36,7 +35,7 @@ class VersionSelectorApplication(object):
             # whereas in case of v2, it returns list.
             # So convert it to iterator to get the versions.
             app_iter = iter(tmp_versions)
-            tmp_versions = jsonutils.loads(six.next(app_iter))
+            tmp_versions = jsonutils.loads(next(app_iter))
             versions['versions'].extend(tmp_versions['versions'])
         return tmp_versions
 

blazar/api/context.py

@@ -14,7 +14,6 @@
 # limitations under the License.
 
 from oslo_serialization import jsonutils
-import six
 
 from blazar import context
 from blazar import exceptions
@@ -35,7 +34,7 @@ def ctx_from_headers(headers):
               "user_name": headers['X-User-Name'],
               "project_name": headers['X-Project-Name'],
               "roles": list(
-                  map(six.text_type.strip, headers['X-Roles'].split(',')))}
+                  map(str.strip, headers['X-Roles'].split(',')))}
 
     # For v1 only, request_id and global_request_id will be available.
     if headers.environ['PATH_INFO'].startswith('/v1'):

blazar/api/v2/controllers/extensions/__init__.py

@@ -18,15 +18,12 @@ import abc
 from oslo_config import cfg
 from oslo_log import log as logging
 from pecan import rest
-import six
-
 
 LOG = logging.getLogger(__name__)
 CONF = cfg.CONF
 
 
-@six.add_metaclass(abc.ABCMeta)
-class BaseController(rest.RestController):
+class BaseController(rest.RestController, metaclass=abc.ABCMeta):
 
     """Mandatory API method name."""
     name = None

blazar/api/v2/controllers/types.py

@@ -17,7 +17,6 @@ import datetime
 import uuid
 
 from oslo_serialization import jsonutils
-import six
 from wsme import types as wtypes
 from wsme import utils as wutils
 
@@ -40,7 +39,7 @@ class UuidType(wtypes.UserType):
 
     def validate(self, value):
         try:
-            valid_uuid = six.text_type(uuid.UUID(value))
+            valid_uuid = str(uuid.UUID(value))
             if self.without_dashes:
                 valid_uuid = valid_uuid.replace('-', '')
             return valid_uuid
@@ -98,8 +97,7 @@ class TextOrInteger(wtypes.UserType):
     @staticmethod
     def validate(value):
         # NOTE(sbauza): We need to accept non-unicoded Python2 strings
-        if (isinstance(value, six.text_type) or isinstance(value, str)
-                or isinstance(value, int)):
+        if (isinstance(value, str) or isinstance(value, int)):
             return value
         else:
             raise exceptions.InvalidInput(cls=TextOrInteger.name, value=value)

blazar/db/migration/alembic_migrations/versions/0_1_initial.py

@@ -28,13 +28,12 @@ down_revision = None
 import uuid
 
 from alembic import op
-import six
 import sqlalchemy as sa
 from sqlalchemy.dialects.mysql import MEDIUMTEXT
 
 
 def _generate_unicode_uuid():
-    return six.text_type(str(uuid.uuid4()))
+    return str(uuid.uuid4())
 
 
 def MediumText():

blazar/db/sqlalchemy/models.py

@@ -15,7 +15,6 @@
 
 
 from oslo_utils import uuidutils
-import six
 import sqlalchemy as sa
 from sqlalchemy.dialects.mysql import MEDIUMTEXT
 from sqlalchemy.orm import relationship
@@ -26,7 +25,7 @@ from blazar.db.sqlalchemy import model_base as mb
 
 
 def _generate_unicode_uuid():
-    return six.text_type(uuidutils.generate_uuid())
+    return str(uuidutils.generate_uuid())
 
 
 def MediumText():

blazar/plugins/base.py

@@ -17,14 +17,12 @@ import abc
 
 from oslo_config import cfg
 from oslo_log import log as logging
-import six
 
 LOG = logging.getLogger(__name__)
 CONF = cfg.CONF
 
 
-@six.add_metaclass(abc.ABCMeta)
-class BasePlugin(object):
+class BasePlugin(object, metaclass=abc.ABCMeta):
 
     resource_type = 'none'
     title = None
@@ -106,8 +104,7 @@ class BasePlugin(object):
         return options
 
 
-@six.add_metaclass(abc.ABCMeta)
-class BaseMonitorPlugin():
+class BaseMonitorPlugin(metaclass=abc.ABCMeta):
     """Base class of monitor plugin."""
     @abc.abstractmethod
     def is_notification_enabled(self):

blazar/plugins/instances/instance_plugin.py

@@ -15,7 +15,6 @@
 import collections
 import datetime
 import retrying
-import six
 
 from novaclient import exceptions as nova_exceptions
 from oslo_config import cfg
@@ -399,7 +398,7 @@ class VirtualInstancePlugin(base.BasePlugin, nova.NovaClientWrapper):
                 values['amount'] = strutils.validate_integer(
                     values['amount'], "amount", 1, db_api.DB_MAX_INT)
             except ValueError as e:
-                raise mgr_exceptions.MalformedParameter(six.text_type(e))
+                raise mgr_exceptions.MalformedParameter(str(e))
 
         if 'affinity' in values:
             if (values['affinity'] not in NONE_VALUES and

blazar/tests/api/__init__.py

@@ -18,7 +18,6 @@ from keystonemiddleware import fixture
 from oslo_utils import uuidutils
 import pecan
 import pecan.testing
-import six
 
 from blazar.api import context as api_context
 from blazar import context
@@ -42,7 +41,7 @@ class APITest(tests.TestCase):
             if not headers:
                 return context.BlazarContext(
                     user_id='fake', project_id='fake', roles=['member'])
-            roles = headers.get('X-Roles', six.text_type('member')).split(',')
+            roles = headers.get('X-Roles', str('member')).split(',')
             return context.BlazarContext(
                 user_id=headers.get('X-User-Id', 'fake'),
                 project_id=headers.get('X-Project-Id', 'fake'),

blazar/tests/api/v1/leases/test_v1_0.py

@@ -15,7 +15,6 @@
 
 import flask
 from oslo_utils import uuidutils
-import six
 from testtools import matchers
 
 from oslo_middleware import request_id as id
@@ -82,7 +81,7 @@ class LeaseAPITestCase(tests.TestCase):
         self.app = make_app()
         self.headers = {'Accept': 'application/json',
                         'OpenStack-API-Version': 'reservation 1.0'}
-        self.lease_uuid = six.text_type(uuidutils.generate_uuid())
+        self.lease_uuid = str(uuidutils.generate_uuid())
         self.mock_ctx = self.patch(api_context, 'ctx_from_headers')
         self.mock_ctx.return_value = context.BlazarContext(
             user_id='fake', project_id='fake', roles=['member'])

blazar/tests/api/v1/oshosts/test_v1_0.py

@@ -16,7 +16,6 @@
 import ddt
 import flask
 from oslo_utils import uuidutils
-import six
 from testtools import matchers
 
 from oslo_middleware import request_id as id
@@ -85,7 +84,7 @@ class OsHostAPITestCase(tests.TestCase):
         self.app = make_app()
         self.headers = {'Accept': 'application/json',
                         'OpenStack-API-Version': 'reservation 1.0'}
-        self.host_id = six.text_type('1')
+        self.host_id = str('1')
         self.mock_ctx = self.patch(api_context, 'ctx_from_headers')
         self.mock_ctx.return_value = context.BlazarContext(
             user_id='fake', project_id='fake', roles=['member'])
@@ -223,16 +222,16 @@ class OsHostAPITestCase(tests.TestCase):
                         headers=self.headers)
             self._assert_response(res, 200, {}, key='allocation')
 
-    @ddt.data({'lease_id': six.text_type(uuidutils.generate_uuid()),
-               'reservation_id': six.text_type(uuidutils.generate_uuid())})
+    @ddt.data({'lease_id': str(uuidutils.generate_uuid()),
+               'reservation_id': str(uuidutils.generate_uuid())})
     def test_allocation_list_with_query_params(self, query_params):
         with self.app.test_client() as c:
             res = c.get('/v1/allocations?{0}'.format(query_params),
                         headers=self.headers)
             self._assert_response(res, 200, {}, key='allocations')
 
-    @ddt.data({'lease_id': six.text_type(uuidutils.generate_uuid()),
-               'reservation_id': six.text_type(uuidutils.generate_uuid())})
+    @ddt.data({'lease_id': str(uuidutils.generate_uuid()),
+               'reservation_id': str(uuidutils.generate_uuid())})
     def test_allocation_get_with_query_params(self, query_params):
         with self.app.test_client() as c:
             res = c.get('/v1/{0}/allocation?{1}'.format(

blazar/tests/api/v1/test_api_version_request.py

@@ -14,7 +14,6 @@
 # limitations under the License.
 
 import ddt
-import six
 
 from blazar.api.v1 import api_version_request
 from blazar import exceptions
@@ -114,7 +113,7 @@ class APIVersionRequestTests(tests.TestCase):
     def test_str(self, major, minor):
         request_input = '%s.%s' % (major, minor)
         request = api_version_request.APIVersionRequest(request_input)
-        request_string = six.text_type(request)
+        request_string = str(request)
 
         self.assertEqual('API Version Request '
                          'Major: %s, Minor: %s' % (major, minor),

blazar/tests/api/v2/test_hosts.py

@@ -15,8 +15,6 @@
 Tests for API /os-hosts/ methods
 """
 from oslo_utils import uuidutils
-import six
-
 
 from blazar.tests import api
 from blazar.utils import trusts
@@ -121,8 +119,8 @@ class TestListHosts(api.APITest):
         self.assertEqual([fake_computehost(id=1)], response)
 
     def test_multiple(self):
-        id1 = six.text_type('1')
-        id2 = six.text_type('2')
+        id1 = str('1')
+        id2 = str('2')
         self.patch(
             self.hosts_rpcapi, 'list_computehosts').return_value = [
                 fake_computehost_from_rpc(id=id1),
@@ -155,7 +153,7 @@ class TestShowHost(api.APITest):
     def setUp(self):
         super(TestShowHost, self).setUp()
 
-        self.id1 = six.text_type('1')
+        self.id1 = str('1')
         self.path = '/os-hosts/{0}'.format(self.id1)
         self.patch(
             self.hosts_rpcapi, 'get_computehost'
@@ -204,7 +202,7 @@ class TestCreateHost(api.APITest):
     def setUp(self):
         super(TestCreateHost, self).setUp()
 
-        self.id1 = six.text_type(uuidutils.generate_uuid())
+        self.id1 = str(uuidutils.generate_uuid())
         self.fake_computehost = fake_computehost(id=self.id1)
         self.fake_computehost_body = fake_computehost_request_body(id=self.id1)
         self.path = '/os-hosts'
@@ -290,7 +288,7 @@ class TestUpdateHost(api.APITest):
     def setUp(self):
         super(TestUpdateHost, self).setUp()
 
-        self.id1 = six.text_type('1')
+        self.id1 = str('1')
         self.fake_computehost = fake_computehost(id=self.id1, name='updated')
         self.fake_computehost_body = fake_computehost_request_body(
             exclude=['reservations', 'events'],
@@ -362,7 +360,7 @@ class TestDeleteHost(api.APITest):
     def setUp(self):
         super(TestDeleteHost, self).setUp()
 
-        self.id1 = six.text_type('1')
+        self.id1 = str('1')
         self.path = '/os-hosts/{0}'.format(self.id1)
         self.patch(self.hosts_rpcapi, 'delete_computehost')
         self.headers = {'X-Roles': 'admin'}

blazar/tests/api/v2/test_leases.py

@@ -15,8 +15,6 @@
 Tests for API /leases/ methods
 """
 from oslo_utils import uuidutils
-import six
-
 
 from blazar.tests import api
 from blazar.utils import trusts
@@ -102,8 +100,8 @@ class TestListLeases(api.APITest):
         self.assertEqual([self.fake_lease], response)
 
     def test_multiple(self):
-        id1 = six.text_type(uuidutils.generate_uuid())
-        id2 = six.text_type(uuidutils.generate_uuid())
+        id1 = str(uuidutils.generate_uuid())
+        id2 = str(uuidutils.generate_uuid())
         self.patch(
             self.rpcapi, 'list_leases').return_value = [
                 fake_lease(id=id1),
@@ -133,7 +131,7 @@ class TestShowLease(api.APITest):
     def setUp(self):
         super(TestShowLease, self).setUp()
 
-        self.id1 = six.text_type(uuidutils.generate_uuid())
+        self.id1 = str(uuidutils.generate_uuid())
         self.fake_lease = fake_lease(id=self.id1)
         self.path = '/leases/{0}'.format(self.id1)
         self.patch(self.rpcapi, 'get_lease').return_value = self.fake_lease
@@ -178,7 +176,7 @@ class TestCreateLease(api.APITest):
     def setUp(self):
         super(TestCreateLease, self).setUp()
 
-        self.id1 = six.text_type(uuidutils.generate_uuid())
+        self.id1 = str(uuidutils.generate_uuid())
         self.fake_lease = fake_lease(id=self.id1)
         self.fake_lease_body = fake_lease_request_body(id=self.id1)
         self.path = '/leases'
@@ -256,7 +254,7 @@ class TestUpdateLease(api.APITest):
     def setUp(self):
         super(TestUpdateLease, self).setUp()
 
-        self.id1 = six.text_type(uuidutils.generate_uuid())
+        self.id1 = str(uuidutils.generate_uuid())
         self.fake_lease = fake_lease(id=self.id1, name='updated')
         self.fake_lease_body = fake_lease_request_body(
             exclude=['reservations', 'events'],
@@ -336,7 +334,7 @@ class TestDeleteLease(api.APITest):
     def setUp(self):
         super(TestDeleteLease, self).setUp()
 
-        self.id1 = six.text_type(uuidutils.generate_uuid())
+        self.id1 = str(uuidutils.generate_uuid())
         self.path = '/leases/{0}'.format(self.id1)
         self.patch(self.rpcapi, 'delete_lease')
 

blazar/tests/db/migration/__init__.py

@@ -22,11 +22,11 @@
 # There is an ongoing work to extact similar code to oslo incubator. Once it is
 # extracted we'll be able to remove this file and use oslo.
 
+import configparser
 import io
 import os
-from six.moves import configparser
-from six.moves.urllib import parse as urlparse
 import subprocess
+from urllib import parse as urlparse
 
 from alembic import command
 from alembic import config as alembic_config

blazar/tests/db/sqlalchemy/test_utils.py

@@ -18,7 +18,6 @@ import datetime
 
 from oslo_context import context
 from oslo_utils import uuidutils
-import six
 
 from blazar.db.sqlalchemy import api as db_api
 from blazar.db.sqlalchemy import utils as db_utils
@@ -27,7 +26,7 @@ from blazar import tests
 
 
 def _get_fake_random_uuid():
-    return six.text_type(uuidutils.generate_uuid())
+    return str(uuidutils.generate_uuid())
 
 
 def _get_fake_lease_uuid():

blazar/tests/manager/test_service.py

@@ -18,9 +18,9 @@ from unittest import mock
 
 import ddt
 import eventlet
+import importlib
 from oslo_config import cfg
 import oslo_messaging as messaging
-from six.moves import reload_module
 from stevedore import enabled
 import testtools
 
@@ -130,7 +130,7 @@ class ServiceTestCase(tests.TestCase):
 
         with mock.patch('blazar.status.lease.lease_status',
                         FakeLeaseStatus.lease_status):
-            reload_module(service)
+            importlib.reload(service)
         self.service = service
         self.manager = self.service.ManagerService()
 

blazar/tests/plugins/instances/test_instance_plugin.py

@@ -19,7 +19,6 @@ import uuid
 
 import ddt
 from novaclient import exceptions as nova_exceptions
-import six
 
 from blazar import context
 from blazar.db import api as db_api
@@ -78,7 +77,7 @@ class TestVirtualInstancePlugin(tests.TestCase):
             }
 
     def get_uuid(self):
-        return six.text_type(str(uuid.uuid4()))
+        return str(uuid.uuid4())
 
     def generate_basic_events(self, lease_id, start, before_end, end):
         return [

blazar/tests/test_exceptions.py

@@ -13,8 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import six
-
 from blazar import exceptions
 from blazar import tests
 
@@ -25,18 +23,17 @@ class BlazarExceptionTestCase(tests.TestCase):
             msg_fmt = "default message"
 
         exc = FakeBlazarException()
-        self.assertEqual('default message', six.text_type(exc))
+        self.assertEqual('default message', str(exc))
 
     def test_error_msg(self):
         self.assertEqual('test',
-                         six.text_type(exceptions.BlazarException('test')))
+                         str(exceptions.BlazarException('test')))
 
     def test_default_error_msg_with_kwargs(self):
         class FakeBlazarException(exceptions.BlazarException):
             msg_fmt = "default message: %(code)s"
 
         exc = FakeBlazarException(code=500)
-        self.assertEqual('default message: 500', six.text_type(exc))
         self.assertEqual('default message: 500', str(exc))
 
     def test_error_msg_exception_with_kwargs(self):
@@ -44,7 +41,6 @@ class BlazarExceptionTestCase(tests.TestCase):
             msg_fmt = "default message: %(mispelled_code)s"
 
         exc = FakeBlazarException(code=500, mispelled_code='blah')
-        self.assertEqual('default message: blah', six.text_type(exc))
         self.assertEqual('default message: blah', str(exc))
 
     def test_default_error_code(self):
@@ -64,5 +60,5 @@ class BlazarExceptionTestCase(tests.TestCase):
     def test_policynotauthorized_exception(self):
         exc = exceptions.PolicyNotAuthorized(action='foo')
         self.assertEqual("Policy doesn't allow foo to be performed",
-                         six.text_type(exc))
+                         str(exc))
         self.assertEqual(403, exc.kwargs['code'])

blazar/utils/plugins.py

@@ -15,7 +15,6 @@
 
 import copy
 from oslo_serialization import jsonutils
-import six
 
 from blazar.manager import exceptions as manager_ex
 
@@ -28,7 +27,7 @@ def convert_requirements(requirements):
     """
     # TODO(frossigneux) Support the "or" operator
     # Convert text to json
-    if isinstance(requirements, six.string_types):
+    if isinstance(requirements, str):
         # Treat empty string as an empty JSON array, to avoid raising a
         # ValueError exception while loading JSON
         #
@@ -64,9 +63,9 @@ def _requirements_with_three_elements(requirements):
     """Return true if requirement list looks like ['<', '$ram', '1024']."""
     return (isinstance(requirements, list) and
             len(requirements) == 3 and
-            isinstance(requirements[0], six.string_types) and
-            isinstance(requirements[1], six.string_types) and
-            isinstance(requirements[2], six.string_types) and
+            isinstance(requirements[0], str) and
+            isinstance(requirements[1], str) and
+            isinstance(requirements[2], str) and
             requirements[0] in ['==', '=', '!=', '>=', '<=', '>', '<'] and
             len(requirements[1]) > 1 and requirements[1][0] == '$' and
             len(requirements[2]) > 0)
@@ -74,7 +73,7 @@ def _requirements_with_three_elements(requirements):
 
 def _requirements_with_and_keyword(requirements):
     return (len(requirements) > 1 and
-            isinstance(requirements[0], six.string_types) and
+            isinstance(requirements[0], str) and
             requirements[0] == 'and' and
             all(convert_requirements(x) for x in requirements[1:]))
 

lower-constraints.txt

@@ -91,7 +91,6 @@ rfc3986==1.1.0
 Routes==2.3.1
 simplegeneric==0.8.1
 simplejson==3.13.2
-six==1.10.0
 snowballstemmer==1.2.1
 Sphinx==2.0.0
 sphinxcontrib-websupport==1.0.1

requirements.txt

@@ -32,7 +32,6 @@ sqlalchemy-migrate>=0.11.0 # Apache-2.0
 requests>=2.18.4 # Apache-2.0
 retrying>=1.3.3,!=1.3.0 # Apache-2.0
 Routes>=2.3.1 # MIT
-six>=1.10.0 # MIT
 SQLAlchemy!=1.1.5,!=1.1.6,!=1.1.7,!=1.1.8,>=1.0.10 # MIT
 stevedore>=1.20.0 # Apache-2.0
 WebOb>=1.7.1 # MIT