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sagemath · Aug 12, 2022 · bde6bb5 · bde6bb5
1 parent 434071a
commit bde6bb5
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/sage/combinat/partition.py b/src/sage/combinat/partition.py
@@ -4027,8 +4027,8 @@ 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)