René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: AttributeError: 'Arrow3D' object has no attribute 'do_3d_projection'","articleBody":"### Bug summary\r\n\r\nNew (appears in `matplotlib=3.5`) an `AttributeError` is thrown stating `'Arrow3D' object has no attribute 'do_3d_projection'`.\r\n\r\nThe error appears when running, e.g., the nice example https://stackoverflow.com/a/29188796 by @tacaswell . Below I extracted a MWE from the stackoverflow code.\r\n\r\n### Code for reproduction\r\n\r\n```python\r\n# MWE extracted from https://stackoverflow.com/a/29188796 by @tacaswell \r\n\r\nimport numpy as np\r\nfrom matplotlib import pyplot as plt\r\nfrom mpl_toolkits.mplot3d import Axes3D\r\nfrom matplotlib.patches import FancyArrowPatch\r\nfrom mpl_toolkits.mplot3d import proj3d\r\n\r\nclass Arrow3D(FancyArrowPatch):\r\n    def __init__(self, xs, ys, zs, *args, **kwargs):\r\n        FancyArrowPatch.__init__(self, (0,0), (0,0), *args, **kwargs)\r\n        self._verts3d = xs, ys, zs\r\n\r\n    def draw(self, renderer):\r\n        xs3d, ys3d, zs3d = self._verts3d\r\n        xs, ys, zs = proj3d.proj_transform(xs3d, ys3d, zs3d, renderer.M)\r\n        self.set_positions((xs[0],ys[0]),(xs[1],ys[1]))\r\n        FancyArrowPatch.draw(self, renderer)\r\n\r\nfig = plt.figure()\r\nax = fig.add_subplot(111, projection='3d')\r\narrow_prop_dict = dict(mutation_scale=20, arrowstyle='-|\u003e', color='k', shrinkA=0, shrinkB=0)\r\na = Arrow3D([0, 10], [0, 0], [0, 0], **arrow_prop_dict)\r\nax.add_artist(a)\r\n```\r\n\r\n\r\n### Actual outcome\r\n\r\n```pytb\r\n---------------------------------------------------------------------------\r\nAttributeError                            Traceback (most recent call last)\r\n~/anaconda3/lib/python3.8/site-packages/IPython/core/formatters.py in __call__(self, obj)\r\n    339                 pass\r\n    340             else:\r\n--\u003e 341                 return printer(obj)\r\n    342             # Finally look for special method names\r\n    343             method = get_real_method(obj, self.print_method)\r\n\r\n~/anaconda3/lib/python3.8/site-packages/IPython/core/pylabtools.py in \u003clambda\u003e(fig)\r\n    248 \r\n    249     if 'png' in formats:\r\n--\u003e 250         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))\r\n    251     if 'retina' in formats or 'png2x' in formats:\r\n    252         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))\r\n\r\n~/anaconda3/lib/python3.8/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)\r\n    132         FigureCanvasBase(fig)\r\n    133 \r\n--\u003e 134     fig.canvas.print_figure(bytes_io, **kw)\r\n    135     data = bytes_io.getvalue()\r\n    136     if fmt == 'svg':\r\n\r\n~/anaconda3/lib/python3.8/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, bbox_inches, pad_inches, bbox_extra_artists, backend, **kwargs)\r\n   2288                 )\r\n   2289                 with getattr(renderer, \"_draw_disabled\", nullcontext)():\r\n-\u003e 2290                     self.figure.draw(renderer)\r\n   2291 \r\n   2292             if bbox_inches:\r\n\r\n~/anaconda3/lib/python3.8/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)\r\n     71     @wraps(draw)\r\n     72     def draw_wrapper(artist, renderer, *args, **kwargs):\r\n---\u003e 73         result = draw(artist, renderer, *args, **kwargs)\r\n     74         if renderer._rasterizing:\r\n     75             renderer.stop_rasterizing()\r\n\r\n~/anaconda3/lib/python3.8/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer)\r\n     48                 renderer.start_filter()\r\n     49 \r\n---\u003e 50             return draw(artist, renderer)\r\n     51         finally:\r\n     52             if artist.get_agg_filter() is not None:\r\n\r\n~/anaconda3/lib/python3.8/site-packages/matplotlib/figure.py in draw(self, renderer)\r\n   2801 \r\n   2802             self.patch.draw(renderer)\r\n-\u003e 2803             mimage._draw_list_compositing_images(\r\n   2804                 renderer, self, artists, self.suppressComposite)\r\n   2805 \r\n\r\n~/anaconda3/lib/python3.8/site-packages/matplotlib/image.py in _draw_list_compositing_images(renderer, parent, artists, suppress_composite)\r\n    130     if not_composite or not has_images:\r\n    131         for a in artists:\r\n--\u003e 132             a.draw(renderer)\r\n    133     else:\r\n    134         # Composite any adjacent images together\r\n\r\n~/anaconda3/lib/python3.8/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer)\r\n     48                 renderer.start_filter()\r\n     49 \r\n---\u003e 50             return draw(artist, renderer)\r\n     51         finally:\r\n     52             if artist.get_agg_filter() is not None:\r\n\r\n~/anaconda3/lib/python3.8/site-packages/mpl_toolkits/mplot3d/axes3d.py in draw(self, renderer)\r\n    445                                     for axis in self._get_axis_list()) + 1\r\n    446                 collection_zorder = patch_zorder = zorder_offset\r\n--\u003e 447                 for artist in sorted(collections_and_patches,\r\n    448                                      key=do_3d_projection,\r\n    449                                      reverse=True):\r\n\r\n~/anaconda3/lib/python3.8/site-packages/mpl_toolkits/mplot3d/axes3d.py in do_3d_projection(artist)\r\n    434                     \"do_3d_projection() was deprecated in Matplotlib \"\r\n    435                     \"%(since)s and will be removed %(removal)s.\")\r\n--\u003e 436                 return artist.do_3d_projection(renderer)\r\n    437 \r\n    438             collections_and_patches = (\r\n\r\nAttributeError: 'Arrow3D' object has no attribute 'do_3d_projection'\r\n```\r\n\r\n[@tacaswell edited to add markup]\r\n\r\n### Expected outcome\r\n\r\nShould draw the fancy arrow.\r\n\r\n### Additional information\r\n\r\nThis worked before matplotlib 3.5; error appears in different Python versions and different backends.\r\n\r\n### Operating system\r\n\r\nLinux\r\n\r\n### Matplotlib Version\r\n\r\n3.5.0\r\n\r\n### Matplotlib Backend\r\n\r\nmodule://ipykernel.pylab.backend_inline\r\n\r\n### Python version\r\n\r\n_No response_\r\n\r\n### Jupyter version\r\n\r\n_No response_\r\n\r\n### Installation\r\n\r\nconda","author":{"url":"https://github.com/prisae","@type":"Person","name":"prisae"},"datePublished":"2021-11-20T09:58:52.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":10},"url":"https://github.com/21688/matplotlib/issues/21688"}