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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[MNT]: Cleanup internal import dependencies and initialization logic","articleBody":"### Summary\n\nThere's a delicate dependency on who goes first in the import order because we couple module dependencies (imports) and intialization (code execution at import).\n\nSee e.g. https://github.com/matplotlib/matplotlib/pull/29808#discussion_r2013917048\n\n### Proposed fix\n\nI think we can make this simpler by applying the following rules\n\n- no submodule is allowed to run intialization code (e.g. loading the colormaps) as part of their import\n- initialization should be lazy if possible\n- if lazy initialization is not possible, the initalization code must be placed in a `_mpl_init()` function in that module. ( (e.g. it's tricky for colormaps because the colormaps are injected as globals into the cm module)\n- only the top-level `matplotlib` module is allowed to call `._mpl_init()` of the submodules.\n\nThis way, we can decouple initialization from import and have one central place that orchestrates the initialization.\n\nWhat do you think?","author":{"url":"https://github.com/timhoffm","@type":"Person","name":"timhoffm"},"datePublished":"2025-03-26T23:35:03.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/29813/matplotlib/issues/29813"}