Fix class/def/class nesting definitions

Fixes #932.

jedi/evaluate/instance.py

@@ -183,9 +183,12 @@ class AbstractInstanceContext(Context):
                 else:
                     bound_method = BoundMethod(
                         self.evaluator, self, class_context,
-                        self.parent_context, scope
+                        parent_context, scope
                     )
                     return bound_method.get_function_execution()
+            elif scope.type == 'classdef':
+                class_context = er.ClassContext(self.evaluator, scope, parent_context)
+                return class_context
             else:
                 raise NotImplementedError
         return class_context

test/completion/classes.py

@@ -509,3 +509,20 @@ Config.mode
 
 #? int()
 Config.mode2
+
+
+# -----------------
+# Nested class/def/class
+# -----------------
+class Foo(object):
+    a = 3
+    def create_class(self):
+        class X():
+            a = self.a
+            self.b = 3.0
+        return X
+
+#? int()
+Foo().create_class().a
+#? float()
+Foo().b

test/completion/lambdas.py

@@ -65,6 +65,8 @@ class C():
     def with_param(self):
         return lambda x: x + self.a()
 
+    lambd = lambda self: self.foo
+
 #? int()
 C().a()
 
@@ -75,6 +77,11 @@ index = C().with_param()(1)
 #? float()
 ['', 1, 1.0][index]
 
+#? float()
+C().lambd()
+#? int()
+C(1).lambd()
+
 
 def xy(param):
     def ret(a, b):