src/sage/geometry/hyperplane_arrangement/hyperplane.py: Add missing import

Matthias Koeppe · Matthias Koeppe · commit 35ff879e25ed · 2024-04-30T20:29:49.000-07:00
diff --git a/src/sage/geometry/hyperplane_arrangement/hyperplane.py b/src/sage/geometry/hyperplane_arrangement/hyperplane.py
@@ -108,9 +108,10 @@
 #                  http://www.gnu.org/licenses/
 # *****************************************************************************
 
+import sage.geometry.abc
 
-from sage.misc.cachefunc import cached_method
 from sage.geometry.linear_expression import LinearExpression, LinearExpressionModule
+from sage.misc.cachefunc import cached_method
 
 
 class Hyperplane(LinearExpression):
