Comprehenions can also define self variables.

Also related to #932.

jedi/evaluate/instance.py

@@ -189,6 +189,9 @@ class AbstractInstanceContext(Context):
             elif scope.type == 'classdef':
                 class_context = er.ClassContext(self.evaluator, scope, parent_context)
                 return class_context
+            elif scope.type == 'comp_for':
+                # Comprehensions currently don't have a special scope in Jedi.
+                return self.create_instance_context(class_context, scope)
             else:
                 raise NotImplementedError
         return class_context

test/completion/classes.py

@@ -526,3 +526,10 @@ class Foo(object):
 Foo().create_class().a
 #? float()
 Foo().b
+
+class Foo(object):
+    def comprehension_definition(self):
+        return [1 for self.b in [1]]
+
+#? int()
+Foo().b