René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Hatch linewidths cannot be modified in an  rcParam context","articleBody":"### Bug summary\r\n\r\nThe only way (that I am aware of) to control the linewidth of hatches is through an rc parameter. But temporarily modifying the parameter with `plt.rc_context` has not effect.\r\n\r\n### Code for reproduction\r\n\r\n```python\r\nimport matplotlib.pyplot as plt\r\n\r\nplt.figure().subplots().bar([0, 1], [1, 2], hatch=[\"/\", \".\"], fc=\"r\")\r\n\r\nwith plt.rc_context({\"hatch.linewidth\": 5}):\r\n    plt.figure().subplots().bar([0, 1], [1, 2], hatch=[\"/\", \".\"], fc=\"g\")\r\n\r\nplt.rc(\"hatch\", linewidth=5)\r\nplt.figure().subplots().bar([0, 1], [1, 2], hatch=[\"/\", \".\"], fc=\"b\")\r\n```\r\n\r\n\r\n### Actual outcome\r\n\r\n![image](https://user-images.githubusercontent.com/315810/133707131-74c9d47c-917b-44f8-9fb2-953145bcf63b.png)\r\n\r\n![image](https://user-images.githubusercontent.com/315810/133707137-2745159b-4595-419e-bb83-23098c29a46b.png)\r\n\r\n![image](https://user-images.githubusercontent.com/315810/133707143-6f2cee3b-0a35-45ad-9db4-58d3d2593be7.png)\r\n\r\n### Expected outcome\r\n\r\nThat second image (the green bars) should have thick hatches.\r\n\r\nFWIW I think hatches ought to have an actual API, but given that they don't, this limitation makes them *really* hard to work with.\r\n\r\n### Operating system\r\n\r\nmacos\r\n\r\n### Matplotlib Version\r\n\r\n3.4.3\r\n\r\n### Matplotlib Backend\r\n\r\ninline","author":{"url":"https://github.com/mwaskom","@type":"Person","name":"mwaskom"},"datePublished":"2021-09-17T00:59:36.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":24},"url":"https://github.com/21108/matplotlib/issues/21108"}