Remove all usage of six library

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

Change-Id: I32d9f261a219ab4dc95a697d9ab1ff5d9298aee8

octavia_lib/api/drivers/data_models.py

@@ -15,8 +15,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import six
-
 
 class BaseDataModel(object):
     def to_dict(self, calling_classes=None, recurse=False,
@@ -52,8 +50,6 @@ class BaseDataModel(object):
                             calling_classes=calling_classes + [type(self)])
                     else:
                         ret[attr] = None
-                elif six.PY2 and isinstance(value, six.text_type):
-                    ret[attr.encode('utf8')] = value.encode('utf8')
                 elif isinstance(value, UnsetType):
                     if render_unsets:
                         ret[attr] = None

octavia_lib/hacking/checks.py

@@ -57,13 +57,10 @@ assert_not_equal_end_with_none_re = re.compile(
     r"(.)*assertNotEqual\(.+, None\)")
 assert_not_equal_start_with_none_re = re.compile(
     r"(.)*assertNotEqual\(None, .+\)")
-assert_no_xrange_re = re.compile(
-    r"\s*xrange\s*\(")
 revert_must_have_kwargs_re = re.compile(
     r'[ ]*def revert\(.+,[ ](?!\*\*kwargs)\w+\):')
 untranslated_exception_re = re.compile(r"raise (?:\w*)\((.*)\)")
 no_basestring_re = re.compile(r"\bbasestring\b")
-no_iteritems_re = re.compile(r".*\.iteritems\(\)")
 no_eventlet_re = re.compile(r'(import|from)\s+[(]?eventlet')
 no_line_continuation_backslash_re = re.compile(r'.*(\\)\n')
 no_logging_re = re.compile(r'(import|from)\s+[(]?logging')
@@ -182,15 +179,6 @@ def no_log_warn(logical_line):
         yield(0, "O339:Use LOG.warning() rather than LOG.warn()")
 
 
-def no_xrange(logical_line):
-    """Disallow 'xrange()'
-
-    O340
-    """
-    if assert_no_xrange_re.match(logical_line):
-        yield(0, "O340: Do not use xrange().")
-
-
 def no_translate_logs(logical_line, filename):
     """O341 - Don't translate logs.
 
@@ -247,24 +235,7 @@ def check_no_basestring(logical_line):
     """
     if no_basestring_re.search(logical_line):
         msg = ("O343: basestring is not Python3-compatible, use "
-               "six.string_types instead.")
+               "str instead.")
-        yield(0, msg)
-
-
-def check_python3_no_iteritems(logical_line):
-    """O344 - Use dict.items() instead of dict.iteritems().
-
-    :param logical_line: The logical line to check.
-    :returns: None if the logical line passes the check, otherwise a tuple
-              is yielded that contains the offending index in logical line
-              and a message describe the check validation failure.
-    """
-    if no_iteritems_re.search(logical_line):
-        msg = ("O344: Use dict.items() instead of dict.iteritems() to be "
-               "compatible with both Python 2 and Python 3. In Python 2, "
-               "dict.items() may be inefficient for very large dictionaries. "
-               "If you can prove that you need the optimization of an "
-               "iterator for Python 2, then you can use six.iteritems(dict).")
         yield(0, msg)
 
 
@@ -338,10 +309,8 @@ def factory(register):
     register(no_mutable_default_args)
     register(assert_equal_in)
     register(no_log_warn)
-    register(no_xrange)
     register(check_raised_localized_exceptions)
     register(check_no_basestring)
-    register(check_python3_no_iteritems)
     register(check_no_eventlet_imports)
     register(check_line_continuation_no_backslash)
     register(check_no_logging_imports)

octavia_lib/tests/unit/api/drivers/test_driver_lib.py

@@ -43,7 +43,7 @@ class TestDriverLib(base.TestCase):
                           self.driver_lib._check_for_socket_ready,
                           'bogus')
 
-    @mock.patch('six.moves.builtins.memoryview')
+    @mock.patch('builtins.memoryview')
     def test_recv(self, mock_memoryview):
         mock_socket = mock.MagicMock()
         mock_socket.recv.side_effect = [b'1', b'\n', b'2', b'\n', b'3', b'\n']

octavia_lib/tests/unit/hacking/test_checks.py

@@ -167,13 +167,6 @@ class HackingTestCase(base.BaseTestCase):
         self.assertEqual(0, len(list(checks.no_log_warn(
             "LOG.warning()"))))
 
-    def test_no_xrange(self):
-        self.assertEqual(1, len(list(checks.no_xrange(
-            "xrange(45)"))))
-
-        self.assertEqual(0, len(list(checks.no_xrange(
-            "range(45)"))))
-
     def test_no_log_translations(self):
         for log in checks._all_log_levels:
             for hint in checks._all_hints:
@@ -210,17 +203,7 @@ class HackingTestCase(base.BaseTestCase):
             "isinstance('foo', basestring)"))))
 
         self.assertEqual(0, len(list(checks.check_no_basestring(
-            "isinstance('foo', six.string_types)"))))
+            "isinstance('foo', str)"))))
-
-    def test_dict_iteritems(self):
-        self.assertEqual(1, len(list(checks.check_python3_no_iteritems(
-            "obj.iteritems()"))))
-
-        self.assertEqual(0, len(list(checks.check_python3_no_iteritems(
-            "six.iteritems(obj)"))))
-
-        self.assertEqual(0, len(list(checks.check_python3_no_iteritems(
-            "obj.items()"))))
 
     def test_check_no_eventlet_imports(self):
         f = checks.check_no_eventlet_imports

requirements.txt

@@ -5,5 +5,4 @@
 oslo.i18n>=3.15.3 # Apache-2.0
 oslo.serialization>=2.28.1 # Apache-2.0
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
-six>=1.10.0 # MIT
 tenacity>=5.0.2 # Apache-2.0