Description
Bug summary
On a9dd8b9 things are fine, on the next commit 396a010 from #22175 we get an error with previously working animation code.
Code for reproduction
import numpy as np
import matplotlib
from matplotlib import pyplot as plt, animation, patches
matplotlib.use('agg', force=True)
fig, ax = plt.subplots()
def _init_anim():
patch_ = patches.Ellipse((0, 0), 1, 1)
Xi, Yi = np.meshgrid(np.arange(4), np.arange(3))
cont = ax.contour(Xi, Yi, Yi, levels=1)
cont.collections[0].set_clip_path(patch_)
fig.tight_layout()
return tuple(cont.collections)
animate_func = lambda: None
anim = animation.FuncAnimation(fig, animate_func, init_func=_init_anim,
frames=1, blit=True)This is nowhere near self-contained, but it will probably take me some time to make a self-contained example. In the meantime I wanted to post this issue in case it was clear from the traceback and git bisect what the problem is.
Actual outcome
File "/home/larsoner/Desktop/rep.py", line 18, in <module>
anim = animation.FuncAnimation(fig, animate_func, init_func=_init_anim,
File "/home/larsoner/python/matplotlib/lib/matplotlib/animation.py", line 1648, in __init__
super().__init__(fig, **kwargs)
File "/home/larsoner/python/matplotlib/lib/matplotlib/animation.py", line 1398, in __init__
super().__init__(fig, event_source=event_source, *args, **kwargs)
File "/home/larsoner/python/matplotlib/lib/matplotlib/animation.py", line 879, in __init__
self._setup_blit()
File "/home/larsoner/python/matplotlib/lib/matplotlib/animation.py", line 1191, in _setup_blit
self._post_draw(None, self._blit)
File "/home/larsoner/python/matplotlib/lib/matplotlib/animation.py", line 1146, in _post_draw
self._fig.canvas.draw_idle()
File "/home/larsoner/python/matplotlib/lib/matplotlib/backend_bases.py", line 1982, in draw_idle
self.draw(*args, **kwargs)
File "/home/larsoner/python/matplotlib/lib/matplotlib/backends/backend_agg.py", line 409, in draw
self.figure.draw(self.renderer)
File "/home/larsoner/python/matplotlib/lib/matplotlib/artist.py", line 73, in draw_wrapper
result = draw(artist, renderer, *args, **kwargs)
File "/home/larsoner/python/matplotlib/lib/matplotlib/artist.py", line 50, in draw_wrapper
return draw(artist, renderer)
File "/home/larsoner/python/matplotlib/lib/matplotlib/figure.py", line 2901, in draw
self.canvas.draw_event(renderer)
File "/home/larsoner/python/matplotlib/lib/matplotlib/backend_bases.py", line 1700, in draw_event
self.callbacks.process(s, event)
File "/home/larsoner/python/matplotlib/lib/matplotlib/cbook/__init__.py", line 301, in process
self.exception_handler(exc)
File "/home/larsoner/python/matplotlib/lib/matplotlib/cbook/__init__.py", line 84, in _exception_printer
raise exc
File "/home/larsoner/python/matplotlib/lib/matplotlib/cbook/__init__.py", line 296, in process
func(*args, **kwargs)
File "/home/larsoner/python/matplotlib/lib/matplotlib/animation.py", line 903, in _start
self._init_draw()
File "/home/larsoner/python/matplotlib/lib/matplotlib/animation.py", line 1712, in _init_draw
self._drawn_artists = self._init_func()
File "/home/larsoner/Desktop/rep.py", line 13, in _init_anim
fig.tight_layout()
File "/home/larsoner/python/matplotlib/lib/matplotlib/figure.py", line 3270, in tight_layout
engine.execute(self)
File "/home/larsoner/python/matplotlib/lib/matplotlib/layout_engine.py", line 159, in execute
kwargs = get_tight_layout_figure(
File "/home/larsoner/python/matplotlib/lib/matplotlib/_tight_layout.py", line 316, in get_tight_layout_figure
kwargs = _auto_adjust_subplotpars(fig, renderer,
File "/home/larsoner/python/matplotlib/lib/matplotlib/_tight_layout.py", line 81, in _auto_adjust_subplotpars
bb += [martist._get_tightbbox_for_layout_only(ax, renderer)]
File "/home/larsoner/python/matplotlib/lib/matplotlib/artist.py", line 1363, in _get_tightbbox_for_layout_only
return obj.get_tightbbox(*args, **{**kwargs, "for_layout_only": True})
File "/home/larsoner/python/matplotlib/lib/matplotlib/axes/_base.py", line 4516, in get_tightbbox
bbox = a.get_tightbbox(renderer)
File "/home/larsoner/python/matplotlib/lib/matplotlib/artist.py", line 344, in get_tightbbox
bbox = Bbox.intersection(bbox, clip_path.get_extents())
File "/home/larsoner/python/matplotlib/lib/matplotlib/transforms.py", line 663, in intersection
x0 = np.maximum(bbox1.xmin, bbox2.xmin)
AttributeError: 'NoneType' object has no attribute 'xmin'
Expected outcome
No error
Additional information
No response
Operating system
Ubuntu 22.04
Matplotlib Version
Matplotlib Backend
QtAgg (PyQt6)
Python version
3.10.4
Jupyter version
No response
Installation
git checkout
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