None issue fix for static analysis

jedi/evaluate/analysis.py

@@ -7,7 +7,6 @@ from jedi.parser import representation as pr
 from jedi.evaluate.compiled import CompiledObject
 
 
-
 CODES = {
     'attribute-error': (1, AttributeError, 'Potential AttributeError.'),
     'import-error': (2, ImportError, 'Potential ImportError.'),
@@ -36,7 +35,7 @@ class Error(object):
         return first + str(CODES[self.name][0])
 
     def description(self):
-        return CODES[self.name][1]
+        return CODES[self.name][2]
 
     def __str__(self):
         return '%s: %s:%s' % (self.code, self.line, self.description())

jedi/evaluate/compiled/__init__.py

@@ -308,12 +308,6 @@ def _parse_function_doc(doc):
 
 
 class Builtin(CompiledObject, IsScope):
-    @memoize
-    def get_defined_names(self):
-        # Filter None, because it's really just a keyword, nobody wants to
-        # access it.
-        return [d for d in super(Builtin, self).get_defined_names() if d.name != 'None']
-
     @memoize
     def get_by_name(self, name):
         item = [n for n in self.get_defined_names() if n.get_code() == name][0]

jedi/evaluate/finder.py

@@ -35,6 +35,11 @@ class NameFinder(object):
         self.position = position
 
     def find(self, scopes, resolve_decorator=True):
+        if unicode(self.name_str) == 'None':
+            # Filter None, because it's really just a keyword, nobody wants to
+            # access it.
+            return []
+
         names = self.filter_name(scopes)
         types = self._names_to_types(names, resolve_decorator)
 

test/static_analysis/attribute_error.py

@@ -36,3 +36,6 @@ Cls.class_attr_error
 c.instance_attr
 #! attribute-error
 c.instance_attr_error
+
+
+c.something = None

test/static_analysis/try_except.py

@@ -34,6 +34,11 @@ except ImportError:
     pass
 except (NotImplementedError, AttributeError): pass
 
+try:
+    #! attribute-error
+    str.not_existing
+except (TypeError, NotImplementedError): pass
+
 # -----------------
 # detailed except
 # -----------------