René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Modifier key press events not recognized on MacOSX backend","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\nKey press events identify every key, except modifiers (control, option, command and shift). This behaviour is different from that of Linux and Windows where modifiers are recognized. This behaviour is identical to what was presented in #9835, and supposedly fixed in #9836.   \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\nfig = plt.figure()\r\n\r\ndef on_key(event):\r\n    print('you pressed', event.key, event.xdata, event.ydata)\r\n\r\nfig.canvas.mpl_connect('key_press_event', on_key)\r\nplt.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\nAll characters recognized, except modifier keys. \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\nWe should be seeing identifiers, such as `shift` and `control` as output from the above script. \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 Big Sur 11.4\r\n  * Matplotlib version (`import matplotlib; print(matplotlib.__version__)`):  3.4.2\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): MacOSX\r\n  * Python version: 3.9.5\r\n  * Jupyter version (if applicable): n/a\r\n  * Other libraries: n/a\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","author":{"url":"https://github.com/Pixadus","@type":"Person","name":"Pixadus"},"datePublished":"2021-06-22T21:22:01.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/20486/matplotlib/issues/20486"}