Change to list

sagemath · Aug 17, 2022 · 75ce24e · 75ce24e
1 parent 28286da
commit 75ce24e
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/sage/combinat/partition.py b/src/sage/combinat/partition.py
@@ -4035,8 +4035,8 @@ def outside_corners(self):
             sage: Partition([]).outside_corners()
             [(0, 0)]
         """
-        p = self
-        if p.is_empty():
+        p = self._list
+        if not p:
             return [(0,0)]
         res = [(0, p[0])]
         res.extend((n, j) for n, (i, j) in enumerate(zip(p[:-1], p[1:]), start=1) if i != j)