René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Output regression in 3.2 that affects SymPy's plotting","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\n\r\nThe SymPy 1.5 documentation was built with matpltolib \u003c 3.2, see the results here:\r\n\r\nhttps://docs.sympy.org/latest/modules/plotting.html\r\n\r\nExample image:\r\n\r\n![image](https://user-images.githubusercontent.com/276007/78270743-16021700-74c0-11ea-8cbf-c93a1336bb6d.png)\r\n\r\nThe SymPy development documentation (SymPy master branch) is now built with matplotlib 3.2, see the results here:\r\n\r\nhttps://docs.sympy.org/dev/modules/plotting.html\r\n\r\nExample image:\r\n\r\n![image](https://user-images.githubusercontent.com/276007/78270698-07b3fb00-74c0-11ea-81c4-c34619a7c930.png)\r\n\r\nI've been documenting the issue over at SymPy here: https://github.com/sympy/sympy/issues/19051\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\nNote that SymPy has a wrapper around various plotting libraries and it will run matplotlib as the backend by default. I have not yet isolated what underlying mpl code in the SymPy wrapper is specifically affected.\r\n\r\n```python\r\nfrom sympy import symbols\r\nfrom sympy.plotting import plot\r\nx = symbols('x')\r\np1 = plot(x*x, show=False)\r\np2 = plot(x, show=False)\r\np1.append(p2[0])\r\np1.show()\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# If applicable, paste the console output here\r\n#\r\n#\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\n**Matplotlib version**\r\n\u003c!--Please specify your platform and versions of the relevant libraries you are using:--\u003e\r\n  * Operating system: Ubuntu 18.04 and 19.10\r\n  * Matplotlib version: 3.1 and 3.2\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`):\r\n  * Python version: 3.6-3.8\r\n  * Jupyter version (if applicable):\r\n  * Other libraries: SymPy 1.5\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\n\r\nChecked with MPL from conda-forge.\r\n","author":{"url":"https://github.com/moorepants","@type":"Person","name":"moorepants"},"datePublished":"2020-04-02T16:02:10.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":16},"url":"https://github.com/17004/matplotlib/issues/17004"}