René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: fig.tight_layout when quiver collection is clipped produces AttributeError","articleBody":"### Bug summary\r\n\r\nWhen I set a clipping path to quiver object with set_clip_path(), Figure.tight_layout() produces AttributeError: 'NoneType' object has no attribute 'xmin'. Without tight_layout() everything works.\r\n\r\n### Code for reproduction\r\n\r\n```python\r\nimport numpy as np\r\nimport matplotlib.pyplot as plt\r\nfrom matplotlib.patches import Circle\r\n\r\nx, y = np.mgrid[-1:1:0.1, -1:1:0.1]\r\nz = np.sin(x) + np.cos(y)\r\nxg, yg = np.gradient(z)\r\n\r\nf, ax = plt.subplots()\r\nh = ax.quiver(x, y, xg, yg, label='Test')\r\nc = Circle((0, 0), radius=1, edgecolor=\"black\", fill=False)\r\nax.add_patch(c)\r\nh.set_clip_path(c)\r\nax.set_aspect(1)\r\nf.tight_layout()\r\n```\r\n\r\n\r\n### Actual outcome\r\n```\r\n---------------------------------------------------------------------------\r\nAttributeError                            Traceback (most recent call last)\r\nCell In [42], line 15\r\n     13 h.set_clip_path(c)\r\n     14 ax.set_aspect(1)\r\n---\u003e 15 f.tight_layout()\r\n\r\nFile ~/miniforge3/envs/apsg/lib/python3.10/site-packages/matplotlib/figure.py:3443, in Figure.tight_layout(self, pad, h_pad, w_pad, rect)\r\n   3441 try:\r\n   3442     self.set_layout_engine(engine)\r\n-\u003e 3443     engine.execute(self)\r\n   3444 finally:\r\n   3445     self.set_layout_engine(None)\r\n\r\nFile ~/miniforge3/envs/apsg/lib/python3.10/site-packages/matplotlib/layout_engine.py:180, in TightLayoutEngine.execute(self, fig)\r\n    178 renderer = fig._get_renderer()\r\n    179 with getattr(renderer, \"_draw_disabled\", nullcontext)():\r\n--\u003e 180     kwargs = get_tight_layout_figure(\r\n    181         fig, fig.axes, subplotspec_list, renderer,\r\n    182         pad=info['pad'], h_pad=info['h_pad'], w_pad=info['w_pad'],\r\n    183         rect=info['rect'])\r\n    184 if kwargs:\r\n    185     fig.subplots_adjust(**kwargs)\r\n\r\nFile ~/miniforge3/envs/apsg/lib/python3.10/site-packages/matplotlib/_tight_layout.py:305, in get_tight_layout_figure(fig, axes_list, subplotspec_list, renderer, pad, h_pad, w_pad, rect)\r\n    300         return {}\r\n    301     span_pairs.append((\r\n    302         slice(ss.rowspan.start * div_row, ss.rowspan.stop * div_row),\r\n    303         slice(ss.colspan.start * div_col, ss.colspan.stop * div_col)))\r\n--\u003e 305 kwargs = _auto_adjust_subplotpars(fig, renderer,\r\n    306                                   shape=(max_nrows, max_ncols),\r\n    307                                   span_pairs=span_pairs,\r\n    308                                   subplot_list=subplot_list,\r\n    309                                   ax_bbox_list=ax_bbox_list,\r\n    310                                   pad=pad, h_pad=h_pad, w_pad=w_pad)\r\n    312 # kwargs can be none if tight_layout fails...\r\n    313 if rect is not None and kwargs is not None:\r\n    314     # if rect is given, the whole subplots area (including\r\n    315     # labels) will fit into the rect instead of the\r\n   (...)\r\n    319     # auto_adjust_subplotpars twice, where the second run\r\n    320     # with adjusted rect parameters.\r\n\r\nFile ~/miniforge3/envs/apsg/lib/python3.10/site-packages/matplotlib/_tight_layout.py:82, in _auto_adjust_subplotpars(fig, renderer, shape, span_pairs, subplot_list, ax_bbox_list, pad, h_pad, w_pad, rect)\r\n     80 for ax in subplots:\r\n     81     if ax.get_visible():\r\n---\u003e 82         bb += [martist._get_tightbbox_for_layout_only(ax, renderer)]\r\n     84 tight_bbox_raw = Bbox.union(bb)\r\n     85 tight_bbox = fig.transFigure.inverted().transform_bbox(tight_bbox_raw)\r\n\r\nFile ~/miniforge3/envs/apsg/lib/python3.10/site-packages/matplotlib/artist.py:1378, in _get_tightbbox_for_layout_only(obj, *args, **kwargs)\r\n   1372 \"\"\"\r\n   1373 Matplotlib's `.Axes.get_tightbbox` and `.Axis.get_tightbbox` support a\r\n   1374 *for_layout_only* kwarg; this helper tries to uses the kwarg but skips it\r\n   1375 when encountering third-party subclasses that do not support it.\r\n   1376 \"\"\"\r\n   1377 try:\r\n-\u003e 1378     return obj.get_tightbbox(*args, **{**kwargs, \"for_layout_only\": True})\r\n   1379 except TypeError:\r\n   1380     return obj.get_tightbbox(*args, **kwargs)\r\n\r\nFile ~/miniforge3/envs/apsg/lib/python3.10/site-packages/matplotlib/axes/_base.py:4450, in _AxesBase.get_tightbbox(self, renderer, call_axes_locator, bbox_extra_artists, for_layout_only)\r\n   4447     bbox_artists = self.get_default_bbox_extra_artists()\r\n   4449 for a in bbox_artists:\r\n-\u003e 4450     bbox = a.get_tightbbox(renderer)\r\n   4451     if (bbox is not None\r\n   4452             and 0 \u003c bbox.width \u003c np.inf\r\n   4453             and 0 \u003c bbox.height \u003c np.inf):\r\n   4454         bb.append(bbox)\r\n\r\nFile ~/miniforge3/envs/apsg/lib/python3.10/site-packages/matplotlib/artist.py:345, in Artist.get_tightbbox(self, renderer)\r\n    343     if clip_path is not None:\r\n    344         clip_path = clip_path.get_fully_transformed_path()\r\n--\u003e 345         bbox = Bbox.intersection(bbox, clip_path.get_extents())\r\n    346 return bbox\r\n\r\nFile ~/miniforge3/envs/apsg/lib/python3.10/site-packages/matplotlib/transforms.py:666, in BboxBase.intersection(bbox1, bbox2)\r\n    660 @staticmethod\r\n    661 def intersection(bbox1, bbox2):\r\n    662     \"\"\"\r\n    663     Return the intersection of *bbox1* and *bbox2* if they intersect, or\r\n    664     None if they don't.\r\n    665     \"\"\"\r\n--\u003e 666     x0 = np.maximum(bbox1.xmin, bbox2.xmin)\r\n    667     x1 = np.minimum(bbox1.xmax, bbox2.xmax)\r\n    668     y0 = np.maximum(bbox1.ymin, bbox2.ymin)\r\n\r\nAttributeError: 'NoneType' object has no attribute 'xmin'\r\n```\r\n\r\n### Expected outcome\r\n\r\nNo error\r\n\r\n### Additional information\r\n\r\n_No response_\r\n\r\n### Operating system\r\n\r\nUbuntu\r\n\r\n### Matplotlib Version\r\n\r\n3.6.0\r\n\r\n### Matplotlib Backend\r\n\r\nmodule://matplotlib_inline.backend_inline\r\n\r\n### Python version\r\n\r\n3.10.6\r\n\r\n### Jupyter version\r\n\r\n3.4.8\r\n\r\n### Installation\r\n\r\nconda","author":{"url":"https://github.com/ondrolexa","@type":"Person","name":"ondrolexa"},"datePublished":"2022-10-06T11:31:10.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":7},"url":"https://github.com/24104/matplotlib/issues/24104"}