[ussuri][goal] Drop python 2.7 support

OpenStack is dropping the py2.7 support in ussuri cycle.

Complete discussion & schedule can be found in
- http://lists.openstack.org/pipermail/openstack-discuss/2019-October/010142.html
- https://etherpad.openstack.org/p/drop-python2-support

Ussuri Communtiy-wide goal:
https://governance.openstack.org/tc/goals/selected/ussuri/drop-py27.html

Cleanup setup.cfg.
Update hacking for python3.
Remove six usage.

Change-Id: I37da6ad3306af138aa16cf73a116f0391d06675f

requirements.txt

@@ -5,5 +5,4 @@ beautifulsoup4>=4.6.0 # MIT
 lxml!=3.7.0,>=4.1.1 # BSD
 oslo.log>=3.37.0 # Apache-2.0
 requests>=2.18.4 # Apache-2.0
-six>=1.11.0 # MIT
 PyYAML>=3.12 # MIT

setup.cfg

@@ -5,6 +5,7 @@ description-file = README.rst
 author = OpenStack
 author-email = openstack-i18n@lists.openstack.org
 home-page = https://docs.openstack.org/i18n/latest/
+python-requires = >=3.6
 classifier =
     Environment :: OpenStack
     Intended Audience :: I18n Contributors
@@ -13,30 +14,12 @@ 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 :: 3.4
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3 :: Only
     Topic :: I18n
 
-[global]
-setup-hooks =
-    pbr.hooks.setup_hook
-
-[files]
-
-[build_sphinx]
-all-files = 1
-warning-is-error = 1
-build-dir = doc/build
-source-dir = doc/source
-
-[wheel]
-universal = 1
-
-[pbr]
-warnerrors = True
-
 [update_catalog]
 domain = i18n
 output_dir = i18n/locale

test-requirements.txt

@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-hacking<0.11,>=0.10.2 # Apache-2.0
+hacking<2.1,>=2.0 # Apache-2.0
 
 Babel!=2.4.0,>=2.5.3 # BSD
 sphinx!=1.6.6,!=1.6.7,>=1.6.5 # BSD

tools/zanata/zanata_stats.py

@@ -27,7 +27,6 @@ import re
 import sys
 
 import requests
-import six
 import yaml
 
 ZANATA_URI = 'https://translate.openstack.org/rest/%s'
@@ -306,8 +305,7 @@ def write_stats_to_file(users, output_file, file_format,
 
 
 def _write_stats_to_csvfile(users, output_file, detail):
-    mode = 'w' if six.PY3 else 'wb'
-    with open(output_file, mode) as csvfile:
+    with open(output_file, 'w') as csvfile:
         writer = csv.writer(csvfile)
         writer.writerow(User.get_flattened_data_title())
         for user in users:

tools/zanata/zanata_userinfo.py

@@ -21,7 +21,6 @@ import os
 import sys
 
 from oslo_log import log as logging
-import six
 import yaml
 from ZanataUtils import IniConfig
 from ZanataUtils import ZanataRestService
@@ -145,17 +144,13 @@ def write_userdata_to_file(users, output_file):
 
 
 def _write_userdata_to_csvfile(userdata, output_file):
-    mode = 'wb' if six.PY2 else 'w'
-    with open(output_file, mode) as csvfile:
+    with open(output_file, 'w') as csvfile:
         writer = csv.writer(csvfile)
         writer.writerow(['user_id', 'lang_code', 'lang',
                          'name', 'email'])
         for data in userdata:
             d = [data['user_id'], data['lang_code'],
                  data['lang'], data['name'], data['email']]
-            if six.PY2:
-                # In Python2 we need to encode unicode strings into strings.
-                d = [s.encode('utf-8') for s in d]
             writer.writerow(d)
 
 

tox.ini

@@ -1,12 +1,12 @@
 [tox]
-minversion = 1.6
+minversion = 3.1.0
 envlist = docs,pep8
+ignore_basepython_conflict = True
 skipsdist = True
 
 [testenv]
 basepython=python3
 usedevelop = True
-setenv = VIRTUAL_ENV={envdir}
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt