--- a/mercurial/context.py	Sun Oct 06 16:39:13 2019 -0400
+++ b/mercurial/context.py	Sun Oct 06 16:55:18 2019 -0400
@@ -23,7 +23,10 @@
     wdirfilenodeids,
     wdirhex,
 )
-from .pycompat import open
+from .pycompat import (
+    getattr,
+    open,
+)
 from . import (
     copies,
     dagop,