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Backport PR #29411 on branch v3.10.x (fix #29410 Modifying Axes' position also alters the original Bbox object used for initialization) #29452

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Merged
merged 1 commit into from
Jan 10, 2025
Merged

Backport PR #29411 on branch v3.10.x (fix #29410 Modifying Axes' position also alters the original Bbox object used for initialization) #29452

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2 changes: 1 addition & 1 deletion lib/matplotlib/axes/_base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -648,7 +648,7 @@ def __init__(self, fig,
args = (rect,)
subplotspec = None
if len(args) == 1 and isinstance(args[0], mtransforms.Bbox):
self._position = args[0]
self._position = args[0].frozen()
elif len(args) == 1 and np.iterable(args[0]):
self._position = mtransforms.Bbox.from_bounds(*args[0])
else:
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11 changes: 11 additions & 0 deletions lib/matplotlib/tests/test_axes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -9580,3 +9580,14 @@ def test_bar_color_precedence():
bars = ax.bar([31, 32, 33], [4, 5, 6], color='red', facecolor='green')
for bar in bars:
assert mcolors.same_color(bar.get_facecolor(), 'green')


@check_figures_equal(extensions=['png'])
def test_axes_set_position_external_bbox_unchanged(fig_test, fig_ref):
# From #29410: Modifying Axes' position also alters the original Bbox
# object used for initialization
bbox = mtransforms.Bbox([[0.0, 0.0], [1.0, 1.0]])
ax_test = fig_test.add_axes(bbox)
ax_test.set_position([0.25, 0.25, 0.5, 0.5])
assert (bbox.x0, bbox.y0, bbox.width, bbox.height) == (0.0, 0.0, 1.0, 1.0)
ax_ref = fig_ref.add_axes([0.25, 0.25, 0.5, 0.5])
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