diff --git a/lib/matplotlib/tests/test_transforms.py b/lib/matplotlib/tests/test_transforms.py
index 959814de82db..3d12b90d5210 100644
--- a/lib/matplotlib/tests/test_transforms.py
+++ b/lib/matplotlib/tests/test_transforms.py
@@ -667,6 +667,13 @@ def test_contains_branch(self):
assert not self.stack1.contains_branch(self.tn1 + self.ta2)
+ blend = mtransforms.BlendedGenericTransform(self.tn2, self.stack2)
+ x, y = blend.contains_branch_seperately(self.stack2_subset)
+ stack_blend = self.tn3 + blend
+ sx, sy = stack_blend.contains_branch_seperately(self.stack2_subset)
+ assert x is sx is False
+ assert y is sy is True
+
def test_affine_simplification(self):
# tests that a transform stack only calls as much is absolutely
# necessary "non-affine" allowing the best possible optimization with
diff --git a/lib/matplotlib/transforms.py b/lib/matplotlib/transforms.py
index 5003e2113930..3575bd1fc14d 100644
--- a/lib/matplotlib/transforms.py
+++ b/lib/matplotlib/transforms.py
@@ -1423,7 +1423,7 @@ def contains_branch_seperately(self, other_transform):
'transforms with 2 output dimensions')
# for a non-blended transform each separate dimension is the same, so
# just return the appropriate shape.
- return [self.contains_branch(other_transform)] * 2
+ return (self.contains_branch(other_transform), ) * 2
def __sub__(self, other):
"""
@@ -2404,6 +2404,15 @@ def _iter_break_from_left_to_right(self):
for left, right in self._b._iter_break_from_left_to_right():
yield self._a + left, right
+ def contains_branch_seperately(self, other_transform):
+ # docstring inherited
+ if self.output_dims != 2:
+ raise ValueError('contains_branch_seperately only supports '
+ 'transforms with 2 output dimensions')
+ if self == other_transform:
+ return (True, True)
+ return self._b.contains_branch_seperately(other_transform)
+
depth = property(lambda self: self._a.depth + self._b.depth)
is_affine = property(lambda self: self._a.is_affine and self._b.is_affine)
is_separable = property(
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