Remove all usage of six library

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

Change-Id: I3aba1299172eda0d4212177ccb794ab20dc41334

lower-constraints.txt

@@ -105,7 +105,6 @@ rsa==3.4.2
 setproctitle==1.1.10
 setuptools==21.0.0
 simplegeneric==0.8.1
-six==1.10.0
 SQLAlchemy==1.0.10
 sqlalchemy-migrate==0.11.0
 sqlparse==0.2.4

qinling/api/controllers/v1/types.py

@@ -14,7 +14,6 @@
 import json
 
 from oslo_utils import uuidutils
-import six
 from wsme import types as wtypes
 
 from qinling import exceptions as exc
@@ -33,7 +32,7 @@ class ListType(wtypes.UserType):
         :param value: A comma separated string of values
         :returns: A list of values.
         """
-        items = [v.strip().lower() for v in six.text_type(value).split(',')]
+        items = [v.strip().lower() for v in str(value).split(',')]
 
         # remove empty items.
         return [x for x in items if x]

qinling/db/sqlalchemy/migration/cli.py

@@ -21,7 +21,6 @@ from alembic import config as alembic_cfg
 from alembic import util as alembic_u
 from oslo_config import cfg
 from oslo_utils import importutils
-import six
 
 # We need to import qinling.api.app to
 # make sure we register all needed options.
@@ -34,7 +33,7 @@ def do_alembic_command(config, cmd, *args, **kwargs):
     try:
         getattr(alembic_cmd, cmd)(config, *args, **kwargs)
     except alembic_u.CommandError as e:
-        alembic_u.err(six.text_type(e))
+        alembic_u.err(str(e))
 
 
 def do_check_migration(config, _cmd):

qinling/engine/utils.py

@@ -15,7 +15,6 @@ import time
 
 from oslo_log import log as logging
 import requests
-import six
 import tenacity
 
 from qinling import context
@@ -48,7 +47,7 @@ def url_request(request_session, url, body=None):
         )
         return False, {'output': 'Function execution failed.'}
 
-    for a in six.moves.xrange(10):
+    for a in range(10):
         res = None
         try:
             # Default execution max duration is 3min, could be configurable

qinling/orchestrator/base.py

@@ -14,7 +14,6 @@
 
 import abc
 
-import six
 from stevedore import driver
 
 from qinling import exceptions as exc
@@ -22,8 +21,7 @@ from qinling import exceptions as exc
 ORCHESTRATOR = None
 
 
-@six.add_metaclass(abc.ABCMeta)
-class OrchestratorBase(object):
+class OrchestratorBase(object, metaclass=abc.ABCMeta):
     """OrchestratorBase interface."""
 
     @abc.abstractmethod

qinling/storage/base.py

@@ -14,7 +14,6 @@
 
 import abc
 
-import six
 from stevedore import driver
 
 from qinling import exceptions as exc
@@ -22,8 +21,7 @@ from qinling import exceptions as exc
 STORAGE_PROVIDER = None
 
 
-@six.add_metaclass(abc.ABCMeta)
-class PackageStorage(object):
+class PackageStorage(object, metaclass=abc.ABCMeta):
     """PackageStorage interface."""
 
     @abc.abstractmethod

qinling/utils/common.py

@@ -18,7 +18,6 @@ import sys
 import warnings
 
 from oslo_utils import uuidutils
-import six
 
 from qinling import exceptions as exc
 from qinling import version
@@ -84,7 +83,7 @@ def convert_dict_to_string(d):
 def datetime_to_str(dct, attr_name):
     """Convert datetime object in dict to string."""
     if (dct.get(attr_name) is not None and
-            not isinstance(dct.get(attr_name), six.string_types)):
+            not isinstance(dct.get(attr_name), str)):
         dct[attr_name] = dct[attr_name].strftime('%Y-%m-%dT%H:%M:%SZ')
 
 

qinling/utils/jobs.py

@@ -16,14 +16,13 @@ import datetime
 import croniter
 from dateutil import parser
 from oslo_utils import timeutils
-import six
 
 from qinling import exceptions as exc
 
 
 def validate_next_time(next_execution_time):
     next_time = next_execution_time
-    if isinstance(next_execution_time, six.string_types):
+    if isinstance(next_execution_time, str):
         try:
             # We need naive datetime object.
             next_time = parser.parse(next_execution_time, ignoretz=True)

qinling/utils/rest_utils.py

@@ -17,7 +17,6 @@ import json
 
 from oslo_log import log as logging
 import pecan
-import six
 import webob
 from wsme import exc as wsme_exc
 
@@ -44,9 +43,9 @@ def wrap_wsme_controller_exception(func):
         except exc.QinlingException as e:
             pecan.response.translatable_error = e
 
-            LOG.error('Error during API call: %s', six.text_type(e))
+            LOG.error('Error during API call: %s', str(e))
             raise wsme_exc.ClientSideError(
-                msg=six.text_type(e),
+                msg=str(e),
                 status_code=e.http_code
             )
 
@@ -65,11 +64,11 @@ def wrap_pecan_controller_exception(func):
         try:
             return func(*args, **kwargs)
         except exc.QinlingException as e:
-            LOG.error('Error during API call: %s', six.text_type(e))
+            LOG.error('Error during API call: %s', str(e))
             return webob.Response(
                 status=e.http_code,
                 content_type='application/json',
-                body=json.dumps(dict(faultstring=six.text_type(e))),
+                body=json.dumps(dict(faultstring=str(e))),
                 charset='UTF-8'
             )
 
@@ -86,7 +85,7 @@ def get_filters(**params):
 
     for column, data in params.items():
         if data is not None:
-            if isinstance(data, six.string_types):
+            if isinstance(data, str):
                 f_type, value = _extract_filter_type_and_value(data)
                 create_or_update_filter(column, value, f_type, filters)
             else:
@@ -128,7 +127,7 @@ def _extract_filter_type_and_value(data):
         prefix = filter_type + ':'
         prefix_len = len(prefix)
         if data.startswith(prefix):
-            value = six.text_type(data[prefix_len:])
+            value = str(data[prefix_len:])
             if filter_type in LIST_VALUE_FILTER_TYPES:
                 value = list(value.split(','))
             return filter_type, value

qinling_tempest_plugin/services/base.py

@@ -13,11 +13,11 @@
 #    limitations under the License.
 
 import json
+import urllib
 
-import six
 from tempest.lib.common import rest_client
 
-urlparse = six.moves.urllib.parse
+urlparse = urllib.parse
 
 
 class QinlingClientBase(rest_client.RestClient):

requirements.txt

@@ -19,7 +19,6 @@ oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
 oslo.service!=1.28.1,>=1.24.0 # Apache-2.0
 pecan!=1.0.2,!=1.0.3,!=1.0.4,!=1.2,>=1.0.0 # BSD
 setuptools!=24.0.0,!=34.0.0,!=34.0.1,!=34.0.2,!=34.0.3,!=34.1.0,!=34.1.1,!=34.2.0,!=34.3.0,!=34.3.1,!=34.3.2,!=36.2.0,>=21.0.0 # PSF/ZPL
-six>=1.10.0 # MIT
 SQLAlchemy!=1.1.5,!=1.1.6,!=1.1.7,!=1.1.8,>=1.0.10 # MIT
 sqlalchemy-migrate>=0.11.0 # Apache-2.0
 stevedore>=1.20.0 # Apache-2.0