Add attrs special attribute to prevent false positve in pylint

Astroid cannot infer this attribute because of the way
attr builds its classes

Close PyCQA/pylint#1884

1 files changed, 4 insertions, 0 deletions

diff --git a/astroid/brain/brain_attrs.py b/astroid/brain/brain_attrs.py
index 2ad32987..a7f0d9f8 100644
--- a/astroid/brain/brain_attrs.py
+++ b/astroid/brain/brain_attrs.py
@@ -32,6 +32,10 @@ def attr_attributes_transform(node):
     """Given that the ClassNode has an attr decorator,
     rewrite class attributes as instance attributes
     """
+    # Astroid can't infer this attribute properly
+    # Prevents https://github.com/PyCQA/pylint/issues/1884
+    node.locals["__attrs_attrs__"] = [astroid.Unknown(parent=node.body)]
+
     for cdefbodynode in node.body:
         if not isinstance(cdefbodynode, astroid.Assign):
             continue