Drop py27 support

This bumps jobs to the current usurri template and drops compatibility
code for Python 2.7.

Change-Id: Ida03f9cca7d276ed8a449d21c0ba58330916e7d9
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

.zuul.yaml

@@ -1,5 +1,4 @@
 - project:
     templates:
-      - openstack-python-jobs
-      - openstack-python3-train-jobs
+      - openstack-python3-ussuri-jobs
       - publish-openstack-docs-pti

renderspec/__init__.py

@@ -14,8 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from __future__ import print_function
-
 import argparse
 import os
 import platform

renderspec/contextfuncs.py

@@ -13,8 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from __future__ import print_function
-
 import os
 
 from jinja2 import contextfilter

renderspec/utils.py

@@ -14,8 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from __future__ import print_function
-
 from contextlib import closing
 from contextlib import contextmanager
 from email.parser import HeaderParser
@@ -23,17 +21,15 @@ import os
 import shutil
 import tarfile
 import tempfile
+import urllib
 import zipfile
 
-import six
-from six.moves.urllib.request import urlopen
-
 
 def _download_file(url, dest_dir, dest_filename):
     """download a given url to a given destination directory and
     destination filenamee"""
     filename = os.path.join(dest_dir, dest_filename)
-    with closing(urlopen(url)) as response:  # nosec
+    with closing(urllib.urlopen(url)) as response:  # nosec
         with open(filename, 'wb') as f:
             while True:
                 buf = response.read(8192)
@@ -68,7 +64,7 @@ def _extract_archive_to_tempdir(archive_filename):
 def _find_archives(directories, basename):
     """return a list of archives in the given directories
     or an empty list if no archive(s) can be found"""
-    if isinstance(directories, six.string_types):
+    if isinstance(directories, str):
         directories = [directories]
 
     return sorted(

renderspec/versions.py

@@ -14,8 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from __future__ import print_function
-
 from packaging.requirements import Requirement
 from packaging.version import Version
 

requirements.txt

@@ -5,4 +5,3 @@ pymod2pkg!=0.8.0,>=0.7.0 # Apache-2.0
 Jinja2>=2.10 # BSD License (3 clause)
 PyYAML>=3.10 # MIT
 packaging>=16.5 # Apache-2.0
-six>=1.10.0 # MIT

setup.cfg

@@ -14,8 +14,6 @@ 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

tox.ini

@@ -1,10 +1,11 @@
 [tox]
-envlist = py27,py37,pypy,pep8
+envlist = py37,pypy,pep8
 minversion = 2.0
 skipsdist = True
 
 [testenv]
 usedevelop = True
+basepython = python3
 install_command = pip install {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
          OS_STDOUT_NOCAPTURE=False
@@ -17,7 +18,6 @@ deps =
 commands = stestr run {posargs}
 
 [testenv:pep8]
-basepython = python3
 deps = {[testenv]deps}
     flake8<3.8.0,>=3.7.0
     bandit>=1.1.0
@@ -26,14 +26,12 @@ commands =
     bandit -r -s B701 renderspec -x tests
 
 [testenv:venv]
-basepython = python3
 commands = {posargs}
 
 [flake8]
 exclude =  .venv,.git,.tox,dist,doc,*lib/python*,*egg,build
 
 [testenv:docs]
-basepython = python3
 deps = -r{toxinidir}/doc/requirements.txt
 commands =
     python setup.py build_sphinx