inherit from object is not required for py3

Change-Id: I3f3b1dca78e2e9b2515231ccc6600b64f31039fb
Signed-off-by: Moisés Guimarães de Medeiros <moguimar@redhat.com>

doc/source/reference/configuration-files.rst

@@ -7,7 +7,7 @@ and ``--config-dir``:
 
 .. code-block:: python
 
-    class ConfigOpts(object):
+    class ConfigOpts:
 
         def __call__(self, ...):
 

doc/source/reference/defining.rst

@@ -81,7 +81,7 @@ the option is referenced:
 
 .. code-block:: python
 
-    class ExtensionManager(object):
+    class ExtensionManager:
 
         enabled_apis_opt = cfg.ListOpt(...)
 

oslo_config/cfg.py

@@ -424,7 +424,7 @@ def _report_deprecation(format_str, format_dict):
 
 
 @functools.total_ordering
-class Opt(object):
+class Opt:
 
     """Base class for all configuration options.
 
@@ -809,7 +809,7 @@ class Opt(object):
         return hash(self) < hash(another)
 
 
-class DeprecatedOpt(object):
+class DeprecatedOpt:
 
     """Represents a Deprecated option.
 
@@ -1416,7 +1416,7 @@ class _ConfigDirOpt(Opt):
         return kwargs
 
 
-class OptGroup(object):
+class OptGroup:
 
     """Represents a group of opts.
 
@@ -3155,7 +3155,7 @@ class ConfigOpts(abc.Mapping):
             """Return the number of options and option groups."""
             return len(self._group._opts)
 
-    class SubCommandAttr(object):
+    class SubCommandAttr:
 
         """Helper class.
 
@@ -3189,7 +3189,7 @@ class ConfigOpts(abc.Mapping):
             except AttributeError:
                 raise NoSuchOptError(name)
 
-    class StrSubWrapper(object):
+    class StrSubWrapper:
 
         """Helper class.
 

oslo_config/generator.py

@@ -174,7 +174,7 @@ def _format_type_name(opt_type):
     return 'unknown value'
 
 
-class _OptFormatter(object):
+class _OptFormatter:
 
     """Format configuration option descriptions to a file."""
 

oslo_config/iniparser.py

@@ -23,7 +23,7 @@ class ParseError(Exception):
         return 'at line %d, %s: %r' % (self.lineno, self.msg, self.line)
 
 
-class BaseParser(object):
+class BaseParser:
     lineno = 0
     parse_exc = ParseError
 

oslo_config/sources/__init__.py

@@ -33,10 +33,10 @@ import abc
 _NoValue = object()
 
 
-class ConfigurationSourceDriver(object, metaclass=abc.ABCMeta):
+class ConfigurationSourceDriver(metaclass=abc.ABCMeta):
     """A backend driver option for oslo.config.
 
-    For each group name listed in **config_source** on the **DEFAULT** group,
+    For each group name listed in **config_source** in the **DEFAULT** group,
     a :class:`ConfigurationSourceDriver` is responsible for creating one new
     instance of a :class:`ConfigurationSource`. The proper driver class to be
     used is selected based on the **driver** option inside each one of the
@@ -96,7 +96,7 @@ class ConfigurationSourceDriver(object, metaclass=abc.ABCMeta):
         """
 
 
-class ConfigurationSource(object, metaclass=abc.ABCMeta):
+class ConfigurationSource(metaclass=abc.ABCMeta):
     """A configuration source option for oslo.config.
 
     A configuration source is able to fetch configuration values based on

oslo_config/tests/test_cfg.py

@@ -3958,7 +3958,7 @@ class FindFileTestCase(BaseTestCase):
 
 class OptDumpingTestCase(BaseTestCase):
 
-    class FakeLogger(object):
+    class FakeLogger:
 
         def __init__(self, test_case, expected_lvl):
             self.test_case = test_case

oslo_config/tests/test_generator.py

@@ -1638,7 +1638,7 @@ class GeneratorRaiseErrorTestCase(base.BaseTestCase):
         class FakeException(Exception):
             pass
 
-        class FakeEP(object):
+        class FakeEP:
 
             def __init__(self):
                 self.name = 'callback_is_expected'

oslo_config/tests/test_types.py

@@ -37,7 +37,7 @@ class ConfigTypeTests(unittest.TestCase):
         MyString()
 
 
-class TypeTestHelper(object):
+class TypeTestHelper:
     def setUp(self):
         super(TypeTestHelper, self).setUp()
         self.type_instance = self.type

oslo_config/types.py

@@ -30,7 +30,7 @@ import netaddr
 import rfc3986
 
 
-class ConfigType(object, metaclass=abc.ABCMeta):
+class ConfigType(metaclass=abc.ABCMeta):
 
     def __init__(self, type_name='unknown type'):
         self.type_name = type_name