René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Bad type hint in `_AxesBase.twinx()`","articleBody":"### Bug summary\r\n\r\nIncorrect type annotation for `_AxesBase.twinx()` (should be `Self`, not `_AxesBase`).\r\n\r\n### Code for reproduction\r\n\r\n```Python\r\nimport matplotlib.pyplot as plt\r\nimport numpy as np\r\n\r\n# First create some toy data:\r\nx = np.linspace(0, 2 * np.pi, 400)\r\ny = np.sin(x**2)\r\nz = np.cos(x**2)\r\n\r\n# Create four polar Axes and access them through the returned array\r\nfig, axsA = plt.subplots()\r\naxsA.plot(x, y)\r\naxsB = axsA.twinx()\r\naxsB.plot(x, z)  # \u003c-- Cannot access attribute \"plot\" for class \"_AxesBase\"\r\n```\r\n\r\n### Actual outcome\r\n\r\naxsB is of type `_AxesBase`\r\n\r\n### Expected outcome\r\n\r\nThe type of `axsB` should be the same as the type of `axsA`.\r\n\r\n### Matplotlib Version\r\n\r\n3.9.1","author":{"url":"https://github.com/randolf-scholz","@type":"Person","name":"randolf-scholz"},"datePublished":"2024-07-29T17:36:34.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/28624/matplotlib/issues/28624"}