[mypy/type] declare type of RegistrableObject.__regid__/__select__

1 files changed, 3 insertions, 2 deletions

diff --git a/logilab/common/registry.py b/logilab/common/registry.py
index 86d5219..dc61883 100644
--- a/logilab/common/registry.py
+++ b/logilab/common/registry.py
@@ -90,6 +90,7 @@ from os.path import join, isdir, exists
 from typing import Dict, Type
 from logging import getLogger
 from warnings import warn
+from typing import Union
 
 from logilab.common.modutils import modpath_from_file
 from logilab.common.logging_ext import set_log_methods
@@ -399,8 +400,8 @@ class RegistrableObject(object):
     """
 
     __registry__ = None
-    __regid__ = None
-    __select__ = None
+    __regid__: Union[None, str] = None
+    __select__: Union[None, str, Predicate] = None
     __abstract__ = True # see doc snipppets below (in Registry class)
 
     @classproperty