Drop py27 and add py38 jobs

- Dropping py27 as is out of support
- Enable py38 testing, already default python on several distros.
- removes six as a dependency as is no longer needed for pure py3

Change-Id: I1e825073abc6cd55aa2fdc363358f2701152c57b

.zuul.yaml

@@ -3,17 +3,16 @@
     templates:
       - openstack-python36-jobs
       - openstack-python37-jobs
+      - openstack-python38-jobs
       - publish-tox-docs-infra
     check:
       jobs:
         - elastic-recheck-tox-queries:
             voting: false
         - openstack-tox-linters
-        - openstack-tox-py27
     gate:
       jobs:
         - openstack-tox-linters
-        - openstack-tox-py27
 
 - job:
     name: elastic-recheck-tox-queries

elastic_recheck/config.py

@@ -14,7 +14,7 @@
 
 import os
 import re
-from six.moves import configparser
+import configparser
 
 DEFAULT_INDEX_FORMAT = 'logstash-%Y.%m.%d'
 

elastic_recheck/query_builder.py

@@ -19,7 +19,7 @@ by elastic recheck to talk with elastic search.
 """
 
 import json
-from six.moves.urllib.parse import quote as urlquote
+from urllib.parse import quote as urlquote
 
 
 def generic(raw_query, facet=None):

elastic_recheck/tests/functional/test_gerrit_comment.py

@@ -13,7 +13,7 @@
 #    under the License.
 
 import gerritlib
-from six.moves import configparser
+import configparser
 import testtools
 
 from elastic_recheck import elasticRecheck

elastic_recheck/tests/unit/test_bot.py

@@ -12,7 +12,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from six.moves import configparser
+import configparser
 import unittest
 import yaml
 

elastic_recheck/tests/unit/test_query.py

@@ -11,7 +11,7 @@
 #    under the License.
 
 import json
-from six import StringIO
+from io import StringIO
 import sys
 
 import mock

requirements.txt

@@ -1,23 +1,15 @@
 pbr>=1.8
-six
 python-dateutil>=2.0
 pytz
 pyelasticsearch<1.0
 gerritlib
 python-daemon>=2.2.0
-# NOTE(mriedem): irc 17.0 dropped support for py2 so use a capped version in
-# that case.
-irc>=15.0.1,<17.0;python_version<'3.4'
-irc>=17.0;python_version>='3.4'
+irc>=17.0
 pyyaml
 lockfile
 Babel>=0.9.6
 lazr.restfulclient>=0.14.2 # LGPL
 httplib2>=0.12.0 # MIT License
-# NOTE(mriedem): launchpadlib has an uncapped dependency on keyring which
-# dropped support for python2.7 in version 19.0.0 so for py27 environments we
-# have to explicitly install a capped version of keyring first.
-keyring<19.0.0;python_version=='2.7'
 launchpadlib>=1.10.6 # LGPL
 Jinja2
 requests

setup.cfg

@@ -13,11 +13,13 @@ classifier =
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX :: Linux
     Programming Language :: Python
-    Programming Language :: Python :: 2
-    Programming Language :: Python :: 2.7
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+
+[options]
+python_requires = >=3.6
 
 [files]
 packages =

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 1.6
-envlist = linters,py38,py37,py36,py27,queries,docs
+envlist = linters,py38,py37,py36,queries,docs
 skipsdist = True
 
 [testenv]