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Issue 2283: Add type-review support for SPARQL query results from Graph.query #2320

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@ajnelson-nist ajnelson-nist commented Mar 27, 2023

Summary of changes

Checklist

  • Checked that there aren't other open pull requests for
    the same change.
    • It's possible PR 2301 and/or PR 2267 will have some impact on this implementation. That's a guess from seeing the wide-ranging set of type signature complaints encountered in this PR's initial patch.
  • Added tests for any changes that have a runtime impact.
    • Added tests for SELECT and CONSTRUCT queries
    • Added tests for DESCRIBE and ASK queries
  • Checked that all tests and type checking passes. (Submitter: Known to not pass yet; will pass before PR is requested to be merged.)
  • For changes that have a potential impact on users of this project:
    • Updated relevant documentation to avoid inaccuracies.
    • Considered adding additional documentation.
    • Considered adding an example in ./examples for new features.
    • Considered updating our changelog (CHANGELOG.md).
  • Considered granting push permissions to the PR branch,
    so maintainers can fix minor issues and keep your PR up to date.

This patch is known to be an incomplete implementation.  Running
`mypy test/test_typing.py` before this patch raised 0 type errors.
After just adding the two new tests, 3.  After starting the subclasses
of Query, 30.

References:
* RDFLib#2283

Signed-off-by: Alex Nelson <[email protected]>
Signed-off-by: Alex Nelson <[email protected]>
@aucampia
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PRs to V6 is closed until further notice. See this for more details:

@aucampia aucampia added the on hold Progress on this issue is blocked by something. label May 21, 2023
@aucampia
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PRs to V6 is closed until further notice. See this for more details:

We will be open for PRs again once this is resolved:

@aucampia aucampia removed the on hold Progress on this issue is blocked by something. label Jun 2, 2023
@nicholascar
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@ajnelson-nist do you want to continue with this PR not that v7.x is out and we are merging PRs again?

Signed-off-by: Alex Nelson <[email protected]>
Potentially, adding an assert() addresses the subclass type review,
per `@classmethod` docs:

> ... If a class method is called for a derived class, the derived class
> object is passed as the implied first argument.

This patch also reverts the first-draft change to `Graph.query`.

References:
* https://docs.python.org/3/library/functions.html#classmethod
* RDFLib#2283 (comment)

Suggested-by: Iwan Aucamp <[email protected]>
Signed-off-by: Alex Nelson <[email protected]>
References:
* RDFLib#2283

Signed-off-by: Alex Nelson <[email protected]>
@ajnelson-nist
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I've given this a nudge. Following @aucampia 's suggestion looks promising, but it runs into a circular import issue bringing in prepareQuery at the point he'd suggested.

The class rdflib.query.Result caught my eye as a potential next point of inspection.

@ajnelson-nist
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I'm pausing working on this for the time being. Suggestions are welcome.

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3 participants