René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Scatter3D: depthshade=False causes IndexError for Tkinter when plotting more than one point.","articleBody":"### Bug report\r\n\r\n**Bug summary**\r\n\r\nSetting `depthshade=False` causes an IndexError for Tkinter when plotting more than one point. There are no errors when plotting one point.\r\n\r\n\r\n**Code for reproduction**\r\n\r\n```python\r\n    fig = plt.figure()\r\n    ax = fig.gca(projection=\"3d\")\r\n    ax.scatter([0,1], [0,1], [0,1], c=\"royalblue\", marker=\"o\",\r\n                depthshade=False, s=60, label=\"H\")\r\n    plt.show()\r\n```\r\n\r\n**Actual outcome**\r\n\r\nI'll only post the first and last rows of the terminal, as the rest contains privacy sensitive information.\r\n\r\nFirst rows:  \r\n```\r\nException in Tkinter callback\r\nTraceback (most recent call last):\r\n  File \"/usr/lib/python3.6/tkinter/__init__.py\", line 1705, in __call__\r\n    return self.func(*args)\r\n  File \"/usr/lib/python3.6/tkinter/__init__.py\", line 749, in callit\r\n    func(*args)\r\n...: line 253, in idle_draw\r\n    self.draw()\r\n```\r\n\r\nLast rows:  \r\n```\r\n.../venv/lib/python3.6/site-packages/mpl_toolkits/mplot3d/art3d.py\", line 507, in do_3d_projection\r\n    fcs = fcs[z_markers_idx]\r\nIndexError: index 1 is out of bounds for axis 0 with size 1\r\n```\r\n\r\n\r\n**Expected outcome**\r\n\r\nIt should just plot two points in a 3D space.\r\n\r\n\r\n**Matplotlib version**\r\n  * Operating system: Ubuntu 18.04\r\n  * Matplotlib version: 3.3.0\r\n  * Matplotlib backend TkAgg:\r\n  * Python version: 3.6.9\r\n  * Jupyter version (if applicable): -\r\n  * Other libraries: \r\n\r\nI recently upgraded Matplotlib via pip:\r\n\r\n```bash\r\npip install --upgrade matplotlib\r\n```\r\n\r\nAnd originally installed it with pip as well within a virtual environment created with python-venv. I tested the code above in an older virtual environment and no errors occur when using matplotlib version 3.2.2.\r\n\r\n","author":{"url":"https://github.com/okkevaneck","@type":"Person","name":"okkevaneck"},"datePublished":"2020-07-23T17:01:23.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":7},"url":"https://github.com/18037/matplotlib/issues/18037"}