Remove all usage of six library

Convert all code to not require six library and instead
use python 3.x logic.

Change-Id: Ifbf5a9beb79f46940bf4e7647a0b6fda99a187fc

lower-constraints.txt

@@ -99,7 +99,6 @@ requestsexceptions==1.2.0
 rfc3986==0.3.1
 Routes==2.3.1
 simplejson==3.5.1
-six==1.10.0
 snowballstemmer==1.2.1
 Sphinx==1.8.0
 sphinxcontrib-websupport==1.0.1

mistralclient/api/base.py

@@ -13,13 +13,13 @@
 #    limitations under the License.
 
 import copy
-import six
+import urllib
 
 from oslo_serialization import jsonutils
 
 from keystoneauth1 import exceptions
 
-urlparse = six.moves.urllib.parse
+urlparse = urllib.parse
 
 
 class Resource(object):

mistralclient/api/v2/client.py

@@ -14,7 +14,6 @@
 #    limitations under the License.
 
 import copy
-import six
 
 from oslo_utils import importutils
 
@@ -48,7 +47,7 @@ class Client(object):
         mistral_url = req.get('mistral_url')
         profile = req.get('profile')
 
-        if mistral_url and not isinstance(mistral_url, six.string_types):
+        if mistral_url and not isinstance(mistral_url, str):
             raise RuntimeError('Mistral url should be a string.')
 
         # If auth url was provided then we perform an authentication, otherwise

mistralclient/api/v2/environments.py

@@ -12,7 +12,6 @@
 #    See the License for the specific language governing permissions and
 #    limitations under the License.
 
-import six
 
 from oslo_serialization import jsonutils
 
@@ -26,7 +25,7 @@ class Environment(base.Resource):
     def _set_attributes(self):
         """Override loading of the "variables" attribute from text to dict."""
         for k, v in self._data.items():
-            if k == 'variables' and isinstance(v, six.string_types):
+            if k == 'variables' and isinstance(v, str):
                 v = jsonutils.loads(v)
 
             try:

mistralclient/api/v2/executions.py

@@ -14,7 +14,6 @@
 #    See the License for the specific language governing permissions and
 #    limitations under the License.
 
-import six
 
 from oslo_serialization import jsonutils
 from oslo_utils import uuidutils
@@ -51,7 +50,7 @@ class ExecutionManager(base.ResourceManager):
             data.update({'workflow_namespace': namespace})
 
         if workflow_input:
-            if isinstance(workflow_input, six.string_types):
+            if isinstance(workflow_input, str):
                 data.update({'input': workflow_input})
             else:
                 data.update({'input': jsonutils.dumps(workflow_input)})

mistralclient/auth/__init__.py

@@ -14,7 +14,6 @@
 
 import abc
 
-import six
 from stevedore import driver
 
 
@@ -28,8 +27,7 @@ def get_auth_handler(auth_type):
     return mgr.driver
 
 
-@six.add_metaclass(abc.ABCMeta)
+class AuthHandler(metaclass=abc.ABCMeta):
-class AuthHandler(object):
     """Abstract base class for an authentication plugin."""
 
     @abc.abstractmethod

mistralclient/auth/keycloak.py

@@ -15,9 +15,9 @@
 import logging
 import os
 import pprint
+import urllib
 
 import requests
-from six.moves import urllib
 
 from mistralclient import auth
 

mistralclient/commands/v2/base.py

@@ -19,14 +19,12 @@ import datetime as dt
 import textwrap
 
 from osc_lib.command import command
-import six
 
 
 DEFAULT_LIMIT = 100
 
 
-@six.add_metaclass(abc.ABCMeta)
+class MistralFormatter(metaclass=abc.ABCMeta):
-class MistralFormatter(object):
     COLUMNS = []
 
     @classmethod
@@ -51,8 +49,7 @@ class MistralFormatter(object):
         pass
 
 
-@six.add_metaclass(abc.ABCMeta)
+class MistralLister(command.Lister, metaclass=abc.ABCMeta):
-class MistralLister(command.Lister):
     @abc.abstractmethod
     def _get_format_function(self):
         raise NotImplementedError
@@ -125,8 +122,7 @@ class MistralLister(command.Lister):
             return f()
 
 
-@six.add_metaclass(abc.ABCMeta)
+class MistralExecutionLister(MistralLister, metaclass=abc.ABCMeta):
-class MistralExecutionLister(MistralLister):
     def get_parser(self, parsed_args):
         parser = super(MistralExecutionLister, self).get_parser(parsed_args)
         parser.set_defaults(limit=DEFAULT_LIMIT)

mistralclient/tests/unit/base_shell_test.py

@@ -12,11 +12,11 @@
 #    See the License for the specific language governing permissions and
 #    limitations under the License.
 
+import io
 import os
 import sys
 
 from oslotest import base
-import six
 
 from mistralclient import shell
 
@@ -29,8 +29,8 @@ class BaseShellTests(base.BaseTestCase):
         _old_env, os.environ = os.environ, clean_env.copy()
 
         try:
-            sys.stdout = six.moves.cStringIO()
+            sys.stdout = io.StringIO()
-            sys.stderr = six.moves.cStringIO()
+            sys.stderr = io.StringIO()
             _shell = shell.MistralShell()
             _shell.run(argstr.split())
         except SystemExit:

mistralclient/tests/unit/test_httpclient.py

@@ -16,7 +16,7 @@ import base64
 import copy
 from unittest import mock
 
-from six.moves.urllib import parse as urlparse
+from urllib import parse as urlparse
 
 from oslo_utils import uuidutils
 from osprofiler import _utils as osprofiler_utils

mistralclient/tests/unit/v2/test_actions.py

@@ -15,8 +15,8 @@
 
 import os.path
 import pkg_resources as pkg
-from six.moves.urllib import parse
+from urllib import parse
-from six.moves.urllib import request
+from urllib import request
 
 from mistralclient.api import base as api_base
 from mistralclient.api.v2 import actions

mistralclient/tests/unit/v2/test_cli_action_execs.py

@@ -15,12 +15,10 @@
 #
 
 import copy
+import io
 import sys
 from unittest import mock
 
-import six
-
-
 from oslo_serialization import jsonutils
 
 from mistralclient.api.v2 import action_executions as action_ex
@@ -162,7 +160,7 @@ class TestCLIActionExecutions(base.BaseCommandTest):
 
         # Redirect the stderr so it doesn't show during tox
         _stderr = sys.stderr
-        sys.stderr = six.StringIO()
+        sys.stderr = io.StringIO()
 
         for state in states:
             self.assertRaises(

mistralclient/tests/unit/v2/test_cli_actions.py

@@ -17,7 +17,6 @@
 
 from unittest import mock
 
-import six
 
 from mistralclient.api.v2 import actions
 from mistralclient.commands.v2 import actions as action_cmd
@@ -90,7 +89,7 @@ class TestCLIActionsV2(base.BaseCommandTest):
     def test_create_long_input(self, mock_open):
         action_long_input_dict = ACTION_DICT.copy()
         long_input = ', '.join(
-            ['var%s' % i for i in six.moves.xrange(10)]
+            ['var%s' % i for i in range(10)]
         )
         action_long_input_dict['input'] = long_input
         workflow_long_input = actions.Action(

mistralclient/tests/unit/v2/test_cli_workflows.py

@@ -15,7 +15,6 @@
 
 from unittest import mock
 
-import six
 
 from mistralclient.api.v2 import workflows
 from mistralclient.commands.v2 import base as cmd_base
@@ -90,7 +89,7 @@ class TestCLIWorkflowsV2(base.BaseCommandTest):
     def test_create_long_input(self, mock_open):
         wf_long_input_dict = WORKFLOW_DICT.copy()
         long_input = ', '.join(
-            ['var%s' % i for i in six.moves.xrange(10)]
+            ['var%s' % i for i in range(10)]
         )
         wf_long_input_dict['input'] = long_input
         workflow_long_input = workflows.Workflow(mock, wf_long_input_dict)

mistralclient/tests/unit/v2/test_environments.py

@@ -19,8 +19,8 @@ import os.path
 from oslo_serialization import jsonutils
 
 import pkg_resources as pkg
-from six.moves.urllib import parse
+from urllib import parse
-from six.moves.urllib import request
+from urllib import request
 
 from mistralclient.api import base as api_base
 from mistralclient.api.v2 import environments

mistralclient/tests/unit/v2/test_workbooks.py

@@ -15,8 +15,8 @@
 
 import os.path
 import pkg_resources as pkg
-from six.moves.urllib import parse
+from urllib import parse
-from six.moves.urllib import request
+from urllib import request
 
 from mistralclient.api import base as api_base
 from mistralclient.api.v2 import workbooks

mistralclient/tests/unit/v2/test_workflows.py

@@ -14,8 +14,8 @@
 
 import os.path
 import pkg_resources as pkg
-from six.moves.urllib import parse
+from urllib import parse
-from six.moves.urllib import request
+from urllib import request
 
 from mistralclient.api.v2 import workflows
 from mistralclient.tests.unit.v2 import base

mistralclient/utils.py

@@ -18,8 +18,8 @@ import yaml
 
 from oslo_serialization import jsonutils
 
-from six.moves.urllib import parse
+from urllib import parse
-from six.moves.urllib import request
+from urllib import request
 
 from mistralclient import exceptions
 

requirements.txt

@@ -10,5 +10,4 @@ pbr!=2.1.0,>=2.0.0 # Apache-2.0
 keystoneauth1>=3.4.0 # Apache-2.0
 PyYAML>=3.12 # MIT
 requests>=2.14.2 # Apache-2.0
-six>=1.10.0 # MIT
 stevedore>=1.20.0 # Apache-2.0