from bt2.field_class import _ArrayFieldClass
from bt2.field_class import _StaticArrayFieldClass
from bt2.field_class import _DynamicArrayFieldClass
-from bt2.field_path import Scope
+from bt2.field_path import FieldPathScope
from bt2.field_path import _IndexFieldPathItem
from bt2.field_path import _CurrentArrayElementFieldPathItem
from bt2.graph import Graph
pass
-class _OverflowError(OverflowError):
+class _OverflowError(_Error, OverflowError):
pass