René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"plt.bar with nan input fails rendering in notebook using 3.3.0rc1 ","articleBody":"\u003c!--To help us understand and resolve your issue, please fill out the form to the best of your ability.--\u003e\r\n\u003c!--You can feel free to delete the sections that do not apply.--\u003e\r\n\r\n### Bug report\r\n\r\n**Bug summary**\r\n\r\n\u003c!--A short 1-2 sentences that succinctly describes the bug--\u003e\r\nA previously-working code (that gets to plot well using other backends or `matplotlib==3.2.2`) fails to render a plot on Jupyter notebook when using `matplotlib==3.3.0rc1`. This has to do with `np.nan` input to `plt.bar`.\r\n\r\n\r\n**Code for reproduction**\r\n\r\n\u003c!--A minimum code snippet required to reproduce the bug.\r\nPlease make sure to minimize the number of dependencies required, and provide\r\nany necessary plotted data.\r\nAvoid using threads, as Matplotlib is (explicitly) not thread-safe.--\u003e\r\n\r\n```python\r\nimport matplotlib.pyplot as plt\r\nimport matplotlib as mpl\r\nimport numpy as np\r\n%matplotlib inline\r\n\r\nx = range(2)\r\nheights = np.asarray([np.nan, 4])\r\n\r\nplt.bar(x, heights)\r\n```\r\n\r\n**Actual outcome**\r\n\r\n\u003c!--The output produced by the above code, which may be a screenshot, console output, etc.--\u003e\r\n\r\n```\r\n\u003cBarContainer object of 2 artists\u003e\r\n---------------------------------------------------------------------------\r\nValueError                                Traceback (most recent call last)\r\n~/.local/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~/.local/lib/python3.8/site-packages/IPython/core/pylabtools.py in \u003clambda\u003e(fig)\r\n    246 \r\n    247     if 'png' in formats:\r\n--\u003e 248         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))\r\n    249     if 'retina' in formats or 'png2x' in formats:\r\n    250         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))\r\n\r\n~/.local/lib/python3.8/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)\r\n    130         FigureCanvasBase(fig)\r\n    131 \r\n--\u003e 132     fig.canvas.print_figure(bytes_io, **kw)\r\n    133     data = bytes_io.getvalue()\r\n    134     if fmt == 'svg':\r\n\r\n~/miniconda/envs/seaborn_devenv/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   2186                         self.figure.draw(renderer)\r\n   2187 \r\n-\u003e 2188                     bbox_inches = self.figure.get_tightbbox(\r\n   2189                         renderer, bbox_extra_artists=bbox_extra_artists)\r\n   2190                     if pad_inches is None:\r\n\r\n~/miniconda/envs/seaborn_devenv/lib/python3.8/site-packages/matplotlib/figure.py in get_tightbbox(self, renderer, bbox_extra_artists)\r\n   2500 \r\n   2501         for a in artists:\r\n-\u003e 2502             bbox = a.get_tightbbox(renderer)\r\n   2503             if bbox is not None and (bbox.width != 0 or bbox.height != 0):\r\n   2504                 bb.append(bbox)\r\n\r\n~/miniconda/envs/seaborn_devenv/lib/python3.8/site-packages/matplotlib/artist.py in get_tightbbox(self, renderer)\r\n    276             The enclosing bounding box (in figure pixel coordinates).\r\n    277         \"\"\"\r\n--\u003e 278         bbox = self.get_window_extent(renderer)\r\n    279         if self.get_clip_on():\r\n    280             clip_box = self.get_clip_box()\r\n\r\n~/miniconda/envs/seaborn_devenv/lib/python3.8/site-packages/matplotlib/patches.py in get_window_extent(self, renderer)\r\n    596 \r\n    597     def get_window_extent(self, renderer=None):\r\n--\u003e 598         return self.get_path().get_extents(self.get_transform())\r\n    599 \r\n    600     def _convert_xy_units(self, xy):\r\n\r\n~/miniconda/envs/seaborn_devenv/lib/python3.8/site-packages/matplotlib/path.py in get_extents(self, transform, **kwargs)\r\n    590             self = transform.transform_path(self)\r\n    591         bbox = Bbox.null()\r\n--\u003e 592         for curve, code in self.iter_bezier(**kwargs):\r\n    593             # places where the derivative is zero can be extrema\r\n    594             _, dzeros = curve.axis_aligned_extrema()\r\n\r\n~/miniconda/envs/seaborn_devenv/lib/python3.8/site-packages/matplotlib/path.py in iter_bezier(self, **kwargs)\r\n    442             if first_vert is None:\r\n    443                 if code != Path.MOVETO:\r\n--\u003e 444                     raise ValueError(\"Malformed path, must start with MOVETO.\")\r\n    445             if code == Path.MOVETO:  # a point is like \"CURVE1\"\r\n    446                 first_vert = verts\r\n\r\nValueError: Malformed path, must start with MOVETO.\r\n\r\n\u003cFigure size 432x288 with 1 Axes\u003e\r\n```\r\n\r\n**Expected outcome**\r\n\r\n\u003c!--A description of the expected outcome from the code snippet--\u003e\r\n\u003c!--If this used to work in an earlier version of Matplotlib, please note the version it used to work on--\u003e\r\n\r\n3.2.2:\r\n![Screen Shot 2020-07-09 at 16 15 04](https://user-images.githubusercontent.com/13831112/87044602-70b5b800-c1ff-11ea-95d5-b3bdcca502e6.png)\r\n\r\n\r\n**Matplotlib version**\r\n\u003c!--Please specify your platform and versions of the relevant libraries you are using:--\u003e\r\n  * Operating system: macOS\r\n  * Matplotlib version: 3.3.0rc1\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): 'module://ipykernel.pylab.backend_inline'\r\n  * Python version: 3.8.3\r\n  * Jupyter version (if applicable): notebook 6.0.3, IPython 7.15.0\r\n  * Other libraries: \r\n\r\n\u003c!--Please tell us how you installed matplotlib and python e.g., from source, pip, conda--\u003e\r\n\u003c!--If you installed from conda, please specify which channel you used if not the default--\u003e\r\nmatplotlib installed using pip \r\npython installed from conda-forge\r\n","author":{"url":"https://github.com/MaozGelbart","@type":"Person","name":"MaozGelbart"},"datePublished":"2020-07-09T13:31:36.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/17868/matplotlib/issues/17868"}