René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug/TYPE]: Scatter `c` Typehint does not support list of numbers when using `cmap`","articleBody":"### Bug summary\n\ntype-checking failing when using something like this:\r\n```\r\nplt.scatter(x_coords, y_coords, c=[0.1, 0.2, 0.3, 0.4, 0.5, 0.6], cmap='jet_r', alpha=0.6)\r\n```\r\n\r\nsaying that `c` has incompatible types:\r\n```\r\nerror: Argument \"c\" to \"scatter\" has incompatible type \"list[float]\"; expected \"Sequence[tuple[float, float, float] | str | str | tuple[float, float, float, float] | tuple[tuple[float, float, float] | str, float] | tuple[tuple[float, float, float, float], float]] | tuple[float, float, float] | str | str | tuple[float, float, float, float] | tuple[tuple[float, float, float] | str, float] | tuple[tuple[float, float, float, float], float] | None\"\r\n```\r\n\r\nHowever, this actually IS allowed by underlying code for plotting since `c` will sample from the `cmap` function.\r\n\r\nI suspect this will happen in any plotting function that allows this behavior.\n\n### Code for reproduction\n\n```python\nplt.scatter([1,2,3,4,5], [1,2,3,4,5], c=[0.1, 0.2, 0.3, 0.4, 0.5, 0.6], cmap='jet_r', alpha=0.6)\n```\n\n\n### Actual outcome\n\nmypy raises error:\r\n```\r\nerror: Argument \"c\" to \"scatter\" has incompatible type \"list[float]\"; expected \"Sequence[tuple[float, float, float] | str | str | tuple[float, float, float, float] | tuple[tuple[float, float, float] | str, float] | tuple[tuple[float, float, float, float], float]] | tuple[float, float, float] | str | str | tuple[float, float, float, float] | tuple[tuple[float, float, float] | str, float] | tuple[tuple[float, float, float, float], float] | None\"\r\n```\n\n### Expected outcome\n\nmypy should not raise error\n\n### Additional information\n\n_No response_\n\n### Operating system\n\n_No response_\n\n### Matplotlib Version\n\n3.8.0\n\n### Matplotlib Backend\n\n_No response_\n\n### Python version\n\n_No response_\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\nNone","author":{"url":"https://github.com/evgenyslab","@type":"Person","name":"evgenyslab"},"datePublished":"2023-09-27T17:52:26.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/26936/matplotlib/issues/26936"}