Is there some standard solution for listing changeset made by specific account, listing tags changed in specific edit, checking which still remain in latest version?

Help and support
1

Note: I am not looking for any solutions starting from “import entire OSM history dump” as I still have no computer able to do this.
Note: I am not looking for GUI tools, I want to use it in a computer program

I know how to do each of these, and I done it as a throwaway half-baked solutions scattered across multiple scripts.

I know about libraries for low-level OSM API communication ( osmapi, osm_easy_api and more)

But is there some existing library able to do this kind of more high-level tasks? (ideally in Python)

Or should I write my own and it would not be reinventing a wheel?

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I don’t know of anything that does all that you describe, but would probably find such a thing useful
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Given how you have described the problem, I probably wouldn’t start from there even if local machine capacity was not an issue.

I’d probably start with ChangesetMD, and expand that to store the bare minimum of object data you need to achieve the rest of what you want.

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The suspucious dude listing for https://resultmaps.neis-one.org/osm-suspicious?uid=1722488#0/10/29

4

No answer , but I always found OSM Deep History visualisation very useful.