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FIX clone to handle dict and GridSearchCV changing original params #26786

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Merged
merged 8 commits into from
Jul 13, 2023
Merged

FIX clone to handle dict and GridSearchCV changing original params #26786

merged 8 commits into from
Jul 13, 2023

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adrinjalali
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Fixes #26737

It seems GridSearchCV actually changes the original given parameter if the parameter is an estimator.

This PR adds handling dict to clone, and fixes the issue in GridSearchCV.

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github-actions bot commented Jul 6, 2023 •
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✔️ Linting Passed

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Generated for commit: 01809d6. Link to the linter CI: here

betatim
betatim reviewed Jul 11, 2023
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betatim
betatim reviewed Jul 11, 2023
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betatim
betatim reviewed Jul 11, 2023
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betatim commented Jul 12, 2023

Test failure is because pipe.named_steps["clf"] is None. I'm a bit puzzled why :-/

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betatim commented Jul 12, 2023

Test failure is because pipe.named_steps["clf"] is None. I'm a bit puzzled why :-/

Confusion solved. The SearchCV clones the estimator (in this case a pipeline). This means that, of course, the original pipe is not modified. Instead we should look at the best_estimator_ attribute of the SearchCV instance to access the refitted estimator. Which in this case is the pipeline we are looking for.

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betatim approved these changes Jul 13, 2023
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LGTM

@betatim betatim added the Waiting for Second Reviewer First reviewer is done, need a second one! label Jul 13, 2023
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@ogrisel this changes clone, wanna have a look?

thomasjpfan
thomasjpfan approved these changes Jul 13, 2023
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I think this change makes sense and is much better than the double clone from before. LGTM

@thomasjpfan thomasjpfan merged commit ba6896e into scikit-learn:main Jul 13, 2023
@adrinjalali adrinjalali deleted the gs/clone branch July 14, 2023 09:44
punndcoder28 pushed a commit to punndcoder28/scikit-learn that referenced this pull request Jul 29, 2023
@adrinjalali @thomasjpfan @punndcoder28
FIX clone to handle dict and GridSearchCV changing original params (s…
1a5245c 
…cikit-learn#26786)

Co-authored-by: Thomas J. Fan <[email protected]>
glemaitre pushed a commit to glemaitre/scikit-learn that referenced this pull request Sep 18, 2023
@adrinjalali @thomasjpfan @glemaitre
FIX clone to handle dict and GridSearchCV changing original params (s…
f1459c3 
…cikit-learn#26786)

Co-authored-by: Thomas J. Fan <[email protected]>
jeremiedbb pushed a commit that referenced this pull request Sep 20, 2023
@adrinjalali @thomasjpfan @jeremiedbb
FIX clone to handle dict and GridSearchCV changing original params (#…
ebe10e6 
…26786)

Co-authored-by: Thomas J. Fan <[email protected]>
REDVM pushed a commit to REDVM/scikit-learn that referenced this pull request Nov 16, 2023
@adrinjalali @thomasjpfan @REDVM
FIX clone to handle dict and GridSearchCV changing original params (s…
15a42da 
…cikit-learn#26786)

Co-authored-by: Thomas J. Fan <[email protected]>
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