--- a/mercurial/graphmod.py	Tue Jul 23 19:14:16 2024 -0400
+++ b/mercurial/graphmod.py	Tue Jul 23 19:20:22 2024 -0400
@@ -18,8 +18,16 @@
 """
 
 
+import typing
+
 from .node import nullrev
 from .thirdparty import attr
+
+# Force pytype to use the non-vendored package
+if typing.TYPE_CHECKING:
+    # noinspection PyPackageRequirements
+    import attr
+
 from . import (
     dagop,
     smartset,