feat/write_elements about unstructured HOT 7 CLOSED

Looks like we need to add handling for those element types in elements_to_isd. As of now, I think the element metadata gets lost when you read it in from JSON too. I'll update the issue description to reflect that. We'll be able to get a fix in for that shortly. Thanks for flagging!

https://github.com/Unstructured-IO/unstructured/blob/main/unstructured/staging/base.py#L26-L33

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@Matthieu-Tinycoaching - There's a PR up to address the issue you flagged. That also adds helper functions for saving to/loading from JSON

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Right now! Just released the updated in 0.4.15

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@Matthieu-Tinycoaching - Checkout out convert_to_isd and isd_to_elements in our docs. You can serialize and deserialize from JSON like this:

with open("elements.json", "w") as f:
    json.dump(convert_to_isd(elements), f)

with open("elements.json", "r") as f:
    elements = isd_to_elements(json.load(f))

Would that meet your needs? We'd also be happy to include an elements_to_json and elements_from_json to wrap that.

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Hi @MthwRobinson thanks for the tip! It seems to do the job.

However, when trying this on the example data layout-parser-paper.pdf, FigureCaption and Text data seem to be lost when reimporting data from the JSON file.

When counting for the types of elements present in the document just after parsing:
Counter({<class 'unstructured.documents.elements.ListItem'>: 223, <class 'unstructured.documents.elements.NarrativeText'>: 69, <class 'unstructured.documents.elements.Title'>: 15, <class 'unstructured.documents.elements.FigureCaption'>: 6, <class 'unstructured.documents.elements.Text'>: 2})

When doing this after reimporting from the JSON file:
Counter({<class 'unstructured.documents.elements.ListItem'>: 223, <class 'unstructured.documents.elements.NarrativeText'>: 69, <class 'unstructured.documents.elements.Title'>: 15})

Any idea?

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Added #270 to capture the missing elements. Will add some serialization/deserialization helper functions while we're in there.

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@MthwRobinson nice!
Do you know when the new release with this fix will be out?

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