[scikit-learn] check_estimator _NotAnArray

[Sole Galli]

fyi, just posted a question in stackoverflow:

https://stackoverflow.com/questions/67500110/what-is-the-check-transformer-data-not-an-array-test-from-sklearns-check-estima

Are there any plans to expand the docs on the check_estimators test?

it would be really helpful to have a general idea of why each test is important, and the consequences of failing this or that test. At least it would be useful for me :p

Thank you!

Sole

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Monday, May 10, 2021 3:28 PM, Sole Galli via scikit-learn <scikit-learn at python.org> wrote:

> Hello everyone,
>
> I am trying to get Feature-engine transformers pass the check_estimator tests and there is one test, that I am not too sure what it is intended for.
>
> The transformers fail the check_transformer_data_not_an_array because the input is a _NotAnArray class, and Feature-engine transformers don't like that.
>
> What is this check intended for? Is it to ensure compatibility with some other sklearn class? if yes, which ones?
>
> I would appreciate any info or links to docs/ issues.
>
> Thanks a lot!
>
> Sole
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