Drop support for Python 2

There's a lot of cleanup possible, but this is a start.

Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
Change-Id: Ia1176b7fd5434d52070d482a37abfbb98800cdb3

8 files changed, 12 insertions, 74 deletions

diff --git a/.zuul.yaml b/.zuul.yaml
index 92889dc..d38f37f 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -30,7 +30,6 @@
     templates:
       - check-requirements
       - lib-forward-testing-python3
-      - openstack-python-jobs
       - openstack-python3-zed-jobs
       - publish-openstack-docs-pti
       - release-notes-jobs-python3
diff --git a/requirements.txt b/requirements.txt
index 4757239..b7c9240 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-futures>=3.0.0;python_version=='2.7' # BSD
+
 requests>=1.1.0
 six>=1.9.0
diff --git a/run_tests.sh b/run_tests.sh
index 6991cd1..d1fc50a 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -9,7 +9,7 @@ function usage {
   echo ""
   echo "This script is deprecated and currently retained for compatibility."
   echo 'You can run the full test suite for multiple environments by running "tox".'
-  echo 'You can run tests for only python 2.7 by running "tox -e py27", or run only'
+  echo 'You can run tests for only python 3.9 by running "tox -e py39", or run only'
   echo 'the pep8 tests with "tox -e pep8".'
   exit
 }
@@ -39,7 +39,7 @@ if [ $just_pep8 -eq 1 ]; then
   exit
 fi
 
-tox -e py27 $toxargs 2>&1 | tee run_tests.err.log  || exit
+tox -e py39 $toxargs 2>&1 | tee run_tests.err.log  || exit
 if [ ${PIPESTATUS[0]} -ne 0 ]; then
   exit ${PIPESTATUS[0]}
 fi
diff --git a/setup.cfg b/setup.cfg
index c780c38..e429b12 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,9 +3,11 @@ name = python-swiftclient
 summary = OpenStack Object Storage API Client Library
 description_file =
     README.rst
+license = Apache License, Version 2.0
 author = OpenStack
 author_email = openstack-discuss@lists.openstack.org
 home_page = https://docs.openstack.org/python-swiftclient/latest/
+python_requires = >=3.6
 classifier =
     Environment :: OpenStack
     Intended Audience :: Information Technology
@@ -14,13 +16,12 @@ classifier =
     Operating System :: POSIX :: Linux
     Operating System :: Microsoft :: Windows
     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
     Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3 :: Only
 
 [files]
 packages =
@@ -41,9 +42,6 @@ console_scripts =
 keystoneauth1.plugin =
     v1password = swiftclient.authv1:PasswordLoader
 
-[bdist_wheel]
-universal = 1
-
 [pbr]
 skip_authors = True
 skip_changelog = True
diff --git a/setup.py b/setup.py
index 16a18f6..22cfdce 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,12 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# THIS FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
-import setuptools, sys
-
-if sys.version_info < (2, 7):
-    sys.exit('Sorry, Python < 2.7 is not supported for'
-             ' python-swiftclient>=3.0')
+import setuptools
 
 setuptools.setup(
     setup_requires=['pbr'],
diff --git a/swiftclient/client.py b/swiftclient/client.py
index 544247a..cc5478a 100644
--- a/swiftclient/client.py
+++ b/swiftclient/client.py
@@ -48,25 +48,11 @@ USER_METADATA_TYPE = tuple('x-%s-meta-' % type_ for type_ in
 URI_PATTERN_INFO = re.compile(r'/info')
 URI_PATTERN_VERSION = re.compile(r'\/v\d+\.?\d*(\/.*)?')
 
-try:
-    from logging import NullHandler
-except ImportError:
-    # Added in Python 2.7
-    class NullHandler(logging.Handler):
-        def handle(self, record):
-            pass
-
-        def emit(self, record):
-            pass
-
-        def createLock(self):
-            self.lock = None
-
 ksexceptions = ksclient_v2 = ksclient_v3 = ksa_v3 = None
 try:
     from keystoneclient import exceptions as ksexceptions
     # prevent keystoneclient warning us that it has no log handlers
-    logging.getLogger('keystoneclient').addHandler(NullHandler())
+    logging.getLogger('keystoneclient').addHandler(logging.NullHandler())
     from keystoneclient.v2_0 import client as ksclient_v2
 except ImportError:
     pass
@@ -93,7 +79,7 @@ if StrictVersion(requests.__version__) < StrictVersion('2.0.0') \
     requests.models.PreparedRequest.prepare_headers = prepare_unicode_headers
 
 logger = logging.getLogger("swiftclient")
-logger.addHandler(NullHandler())
+logger.addHandler(logging.NullHandler())
 
 #: Default behaviour is to redact header values known to contain secrets,
 #: such as ``X-Auth-Key`` and ``X-Auth-Token``. Up to the first 16 chars
diff --git a/test/unit/test_swiftclient.py b/test/unit/test_swiftclient.py
index ea5f502..f6dc258 100644
--- a/test/unit/test_swiftclient.py
+++ b/test/unit/test_swiftclient.py
@@ -1976,34 +1976,8 @@ class TestHTTPConnection(MockHttpTest):
         self.assertFalse(resp.read())
         self.assertTrue(resp.closed)
 
-    @unittest.skipIf(six.PY3, 'python2 specific test')
-    def test_response_python2_headers(self):
-        '''Test utf-8 headers in Python 2.
-        '''
-        _, conn = c.http_connection(u'http://www.test.com/')
-        conn.resp = MockHttpResponse(
-            status=200,
-            headers={
-                '\xd8\xaa-unicode': '\xd8\xaa-value',
-                'empty-header': ''
-            }
-        )
-
-        resp = conn.getresponse()
-        self.assertEqual(
-            '\xd8\xaa-value', resp.getheader('\xd8\xaa-unicode'))
-        self.assertEqual(
-            '\xd8\xaa-value', resp.getheader('\xd8\xaa-UNICODE'))
-        self.assertEqual('', resp.getheader('empty-header'))
-        self.assertEqual(
-            dict([('\xd8\xaa-unicode', '\xd8\xaa-value'),
-                  ('empty-header', ''),
-                  ('etag', '"%s"' % EMPTY_ETAG)]),
-            dict(resp.getheaders()))
-
-    @unittest.skipIf(six.PY2, 'python3 specific test')
     def test_response_python3_headers(self):
-        '''Test latin1-encoded headers in Python 3.
+        '''Test latin1-encoded headers.
         '''
         _, conn = c.http_connection(u'http://www.test.com/')
         conn.resp = MockHttpResponse(
diff --git a/tox.ini b/tox.ini
index fbc58c7..e1e679d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py3,pep8
+envlist = py3,pep8
 minversion = 3.18.0
 skipsdist = True
 
@@ -21,16 +21,13 @@ allowlist_externals = sh
 passenv = SWIFT_* *_proxy
 
 [testenv:pep8]
-basepython = python3
 commands =
     python -m flake8 swiftclient test
 
 [testenv:venv]
-basepython = python3
 commands = {posargs}
 
 [testenv:cover]
-basepython = python3
 setenv =
     PYTHON=coverage run --source swiftclient --parallel-mode
 commands =
@@ -41,7 +38,6 @@ commands =
     coverage report
 
 [testenv:func]
-basepython = python3
 setenv =
     OS_TEST_PATH=test.functional
     PYTHON=coverage run --source swiftclient --parallel-mode
@@ -56,14 +52,7 @@ commands =
     coverage report -m
     rm -f .coverage
 
-[testenv:py2func]
-basepython=python2
-setenv = {[testenv:func]setenv}
-allowlist_externals = {[testenv:func]allowlist_externals}
-commands = {[testenv:func]commands}
-
 [testenv:docs]
-basepython = python3
 usedevelop = False
 deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
        -r{toxinidir}/doc/requirements.txt
@@ -88,7 +77,6 @@ show-source = True
 exclude = .venv,.tox,dist,doc,*egg
 
 [testenv:bindep]
-basepython = python3
 # Do not install any requirements. We want this to be fast and work even if
 # system dependencies are missing, since it's used to tell you what system
 # dependencies are missing! This also means that bindep must be installed
@@ -98,14 +86,12 @@ deps = bindep
 commands = bindep test
 
 [testenv:releasenotes]
-basepython = python3
 usedevelop = False
 deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
        -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -a -W -E -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [testenv:pdf-docs]
-basepython = python3
 deps = {[testenv:docs]deps}
 allowlist_externals =
   make