namedtuple inference knows about '_fields' attribute.

2 files changed, 4 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 2fff5b8..d056337 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -8,6 +8,8 @@ Change log for the astroid package (used to be astng)
     * Set the parent of vararg and kwarg nodes when inferring them.
       Closes issue #43.
 
+    * namedtuple inference knows about '_fields' attribute.
+
 2014-07-25  --  1.2.0
 
     * Function nodes can detect decorator call chain and see if they are
diff --git a/brain/py2stdlib.py b/brain/py2stdlib.py
index e75c3ed..65d9d41 100644
--- a/brain/py2stdlib.py
+++ b/brain/py2stdlib.py
@@ -258,6 +258,7 @@ def infer_named_tuple(node, context=None):
                                                    context=context)
     fake = AstroidBuilder(MANAGER).string_build('''
 class %(name)s(tuple):
+    _fields = %(fields)r
     def _asdict(self):
         return self.__dict__
     @classmethod
@@ -272,6 +273,7 @@ class %(name)s(tuple):
     class_node.locals['_asdict'] = fake.body[0].locals['_asdict']
     class_node.locals['_make'] = fake.body[0].locals['_make']
     class_node.locals['_replace'] = fake.body[0].locals['_replace']
+    class_node.locals['_fields'] = fake.body[0].locals['_fields']
     # we use UseInferenceDefault, we can't be a generator so return an iterator
     return iter([class_node])