From b365e090897d4ee8d9e3b241150b520b37afc01f Mon Sep 17 00:00:00 2001 From: hu-xiaonan <152783907+hu-xiaonan@users.noreply.github.com> Date: Sat, 11 Jan 2025 02:33:44 +0800 Subject: [PATCH] Backport PR #29411: fix #29410 Modifying Axes' position also alters the original Bbox object used for initialization --- lib/matplotlib/axes/_base.py | 2 +- lib/matplotlib/tests/test_axes.py | 11 +++++++++++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/lib/matplotlib/axes/_base.py b/lib/matplotlib/axes/_base.py index 2ff37d96021a..e45957fdd591 100644 --- a/lib/matplotlib/axes/_base.py +++ b/lib/matplotlib/axes/_base.py @@ -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: diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py index 991e8689a360..435a1462d2ee 100644 --- a/lib/matplotlib/tests/test_axes.py +++ b/lib/matplotlib/tests/test_axes.py @@ -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])