CHANGELOG.rst

 Changes
 =======
+0.6.1 - 2018-05-06
+------------------
+
+* Fix N804 check for ``cls`` used in metaclass methods (See also
+  https://github.com/PyCQA/pep8-naming/issues/53)
+
 0.6.0 - 2018-05-04
 ------------------

src/pep8ext_naming.py

@@ -12,7 +12,7 @@ try:
 except ImportError:
     from flake8.util import ast, iter_child_nodes
-__version__ = '0.6.0'
+__version__ = '0.6.1'
 LOWERCASE_REGEX = re.compile(r'[_a-z][_a-z0-9]*$')
 UPPERCASE_REGEX = re.compile(r'[_A-Z][_A-Z0-9]*$')
@@ -180,9 +180,10 @@ class NamingChecker(object):
             if isinstance(meth, ast.Name):
                 late_decoration[meth.id] = self.decorator_to_type[func_name]
+        cls_bases = [b for b in cls_node.bases if isinstance(b, ast.Name)]
         # If this class inherits from `type`, it's a metaclass, and we'll
         # consider all of it's methods to be classmethods.
-        ismetaclass = any(name for name in cls_node.bases if name.id == 'type')
+        ismetaclass = any(name for name in cls_bases if name.id == 'type')
         # iterate over all functions and tag them
         for node in iter_child_nodes(cls_node):

testsuite/N804.py

@@ -27,3 +27,10 @@ class Meta(type):
 class MetaMethod(type):
     def test(cls):
         pass
+#: Okay
+class NotMeta(object):
+    otherclass = Foo
+class AttributeParent(NotMeta.otherclass):
+    pass
+class CallParent(type('_tmp', (), {})):
+    pass