Why did anvil.media.from_file stop working here?

Anvil Q&A
4

From the docs on writing to disk:

https://anvil.works/docs/working-with-files/media/files_on_disk#read-and-write-files-as-normal
Files in your filesystem are temporary, and may be removed without warning. We advise you only to access files in the /tmp directory.

The above code works for me on the full python runtime but not in the python 3.10 runtime.

So I’d suggest changing the code

    final = WB.save("/tmp/doc.xlsx")
    app_tables.table_1.add_row(doc=anvil.media.from_file("/tmp/doc.xlsx"))

I also like this version:

    with anvil.media.TempFile() as f:
        final = WB.save(f)
        app_tables.table_1.add_row(doc=anvil.media.from_file(f, name="doc.xlsx"))

If you don’t provide a media object to TempFile you just get a temp file location you can use within a with block

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