René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[MNT] [TYPING]: Use of Literal","articleBody":"### Summary\n\nWhile checking `pyplot` and corresponding `matplotlib` methods, I noticed that there are several functions where we could use `typing.Literal` to explicitly indicate the possible values and have them suggested by IDEs.\nWe also can create the corresponding TypeAlias on `matplotlib.typing` when necessary.\n\n### Proposed fix\n\n| Function | Parameter | Literal replacing str | PR |\n|--------|--------|--------|--------|\n| mpl.set_loglevel | level | `\"notset\", \"debug\", \"info\", \"warning\", \"error\", \"critical\"` | #30302 |\n| plt.connect | s | `\"button_press_event\", \"button_release_event\"`, ... | #30275 |\n| plt.Axes.scatter | marker | _See MarkerType behind_ | #30261 |\n| mpl.rc | group | `\"animation\", \"axes\", axes3d, \"axes3d\", \"boxplot\"`, ... | #30316 |\n| mpl.RcParams.__get_item__ / __set_item__ | key | -- | #30316 |\n\n| Type | Literal replacing str | PR |\n|--------|--------|--------|\n| MarkerType | \".\", \",\", \"o\" | #30261 |\n\nOn MarkerType we can also add litterals for the tuple version that is not indicated for now:\n```py\ntuple[int, Literal[1, 2, 3], int]\n```","author":{"url":"https://github.com/ZPyrolink","@type":"Person","name":"ZPyrolink"},"datePublished":"2025-07-03T20:39:52.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/30257/matplotlib/issues/30257"}