{"id":19066014,"url":"https://github.com/metapages/metaframe-py","last_synced_at":"2026-04-29T14:33:55.925Z","repository":{"id":206708197,"uuid":"716738282","full_name":"metapages/metaframe-py","owner":"metapages","description":"Python metaframe via 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Python [metaframe](https://docs.metapage.io/docs) (via pyiodide)\n\n```mermaid\ngraph LR\n    classDef mpColor fill:#87d0ff,stroke:#87d0ff,stroke-width:2px;\n    subgraph metapage\n    direction LR\n        left1(upstream metaframe) --\u003e|inputs| M(python code):::mpColor\n        M --\u003e |outputs| right1(downstream metaframe)\n    end\n\n```\n\nExamples:\n - [create matplotlib plots](https://app.metapages.org/#?definition=%7B%22meta%22%3A%7B%22layouts%22%3A%7B%22react-grid-layout%22%3A%7B%22docs%22%3A%22https%3A%2F%2Fwww.npmjs.com%2Fpackage%2Freact-grid-layout%22%2C%22layout%22%3A%5B%7B%22h%22%3A3%2C%22i%22%3A%22image1%22%2C%22moved%22%3Afalse%2C%22static%22%3Afalse%2C%22w%22%3A12%2C%22x%22%3A0%2C%22y%22%3A2%7D%2C%7B%22h%22%3A5%2C%22i%22%3A%22image2%22%2C%22moved%22%3Afalse%2C%22static%22%3Afalse%2C%22w%22%3A12%2C%22x%22%3A0%2C%22y%22%3A5%7D%2C%7B%22h%22%3A2%2C%22i%22%3A%22pyiodide-dev%22%2C%22moved%22%3Afalse%2C%22static%22%3Afalse%2C%22w%22%3A12%2C%22x%22%3A0%2C%22y%22%3A0%7D%5D%2C%22props%22%3A%7B%22cols%22%3A12%2C%22containerPadding%22%3A%5B5%2C5%5D%2C%22margin%22%3A%5B10%2C20%5D%2C%22rowHeight%22%3A100%7D%7D%7D%2C%22name%22%3A%22A%20new%20kind%20of%20publishing%20-%20self-contained%20URLS%22%7D%2C%22metaframes%22%3A%7B%22image1%22%3A%7B%22inputs%22%3A%5B%7B%22metaframe%22%3A%22pyiodide-dev%22%2C%22source%22%3A%22image1%22%2C%22target%22%3A%22image1%22%7D%5D%2C%22url%22%3A%22https%3A%2F%2Fjs.mtfm.io%2F%23%3Fedit%3D1%26js%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%3D%3D%26modules%3DJTVCJTVE%22%7D%2C%22image2%22%3A%7B%22inputs%22%3A%5B%7B%22metaframe%22%3A%22pyiodide-dev%22%2C%22source%22%3A%22image2%22%2C%22target%22%3A%22image2%22%7D%5D%2C%22url%22%3A%22https%3A%2F%2Fjs.mtfm.io%2F%23%3Fedit%3D1%26js%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%3D%3D%26modules%3DJTVCJTVE%22%7D%2C%22pyiodide-dev%22%3A%7B%22inputs%22%3A%5B%7B%22metaframe%22%3A%22input%22%2C%22source%22%3A%22text%22%2C%22target%22%3A%22text%22%7D%2C%7B%22metaframe%22%3A%22generate-inputs%22%2C%22source%22%3A%22*%22%2C%22target%22%3A%22*%22%7D%5D%2C%22url%22%3A%22https%3A%2F%2Fpy.mtfm.io%2F%23%3Fedit%3D1%26options%3DJTdCJTIyciUyMiUzQXRydWUlN0Q%3D%26py%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- [inputs/outputs](https://app.metapage.io/dion/py.mtfm.io-test/view) \n\n\n - Run python code entire in the browser, and connect to other metaframes\n - Edit python code directly in the frame\n - All code and configuration is stored in the URL\n   - shareable and durable\n\n## Configuration + Inputs/Outputs\n\nThere are two (metaframe) modes (set in ⚙️ Options):\n\n1. `✅ Re-run python code on new inputs`: Anytime new metaframe inputs arrive, restart the script. Any files in `/outputs` are copied and send as metaframe outputs. If the file suffix is recognized (e.g. `.js`, `.json`, `.py`) then it will be sent as a string (or directly as JSON if ending in `.json`), otherwise it will be send as an ArrayBuffer.\n   - Inputs **are** copied as files\n2. `❌ Re-run python code on new inputs`: Run the script once, the script is responsible for listening to inputs by calling the metaframe object (see examples below).\n   - Inputs are **not** copied as files \n  \nThe use case of copying inputs and outputs as files but **not* re-running seems counterintuitive to me, let me know if you have this use case: https://github.com/metapages/metaframe-py/issues\n\n## Useful code snippets\n\n### Get the (current) metaframe inputs\n\n```python\nfrom js import metaframe\n\ninputs = metaframe.getInputs().as_object_map()\n\nfor key in inputs:\n    print(key)\n    print(inputs[key])\n    # Do something with the value\n```\n\n### Listen to new metaframe inputs\n\n```python\nfrom pyodide.ffi import create_proxy\nfrom js import metaframe\n\ndef onInputs(*args):\n    print('got inputs in python:')\n    inputs = args[0].as_object_map()\n    for key in inputs:\n      print(key)\n\nonInputsProxy = create_proxy(onInputs) \ndisposer = metaframe.onInputs(onInputsProxy)\n# Call the disposer via the scriptUnload described next below\n\n```\n\n### Unload/cleanup/dispose\n\nWhen iterating/editing, the python script is repeatedly run in the `pyiodide` object. This can cause problems if proxied `js \u003c-\u003e python` objects are not properly disposed.\n\nBefore every new python script execution, (in javascript) if a `window.scriptUnload` script exists, it is called. This is where you put your cleanup:\n\n```python\nfrom pyodide.ffi import create_proxy\nfrom js import window\n\n# Put this at the end of your script:\ndef scriptUnload(*args):\n    print('unloading from python')\n    # Call your cleanup code here\nproxy_scriptUnload = create_proxy(scriptUnload)\nwindow.scriptUnload = proxy_scriptUnload\n```\n\n### Logging to the main div\n\nSome convenience functions:\n\n```py\n\n# log is the same as logStderr \nfrom js import log, logStdout, logStderr\n\n# These functions only take a single string, no fancy formatting or multiple arguments\nlog(\"some string\")\nlogStdout(\"some string\")\nlogStderr(\"some error\")\n```\n\n## Advanced\n\n- Testing, input/outputs, capabilities, development metapage: \n  - https://app.metapage.io/dion/py.mtfm.io-test/view\n- Example metapage running python with inputs and outputs and plotting:\n  - https://app.metapage.io/dion/py.mtfm.io-example-01\n\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmetapages%2Fmetaframe-py","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmetapages%2Fmetaframe-py","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmetapages%2Fmetaframe-py/lists"}