René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Twinning an axis resets tick visibility","articleBody":"\r\n### Bug report\r\n\r\n```python\r\nimport matplotlib.pyplot as plt\r\nwith plt.rc_context({'ytick.left': False}):\r\n    f, ax = plt.subplots()\r\n    print(ax.yaxis.majorTicks[0].tick1line.get_visible())\r\n    ax.twinx()\r\n    print(ax.yaxis.majorTicks[0].tick1line.get_visible())\r\n```\r\n\r\n**Actual outcome**\r\n\r\n```\r\nFalse\r\nTrue\r\n```\r\n\r\n**Expected outcome**\r\n\r\n```\r\nFalse\r\nFalse\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: 3.1.1\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): MacOSX\r\n  * Python version: 3.7.4\r\n  * Jupyter version (if applicable): N/A\r\n  * Other libraries: N/A","author":{"url":"https://github.com/mwaskom","@type":"Person","name":"mwaskom"},"datePublished":"2019-09-04T20:26:08.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":16},"url":"https://github.com/15188/matplotlib/issues/15188"}