[Data] Callback-based stat computation for preprocessors and ValueCounter#56848
Merged
alexeykudinkin merged 9 commits intomasterfrom Oct 20, 2025
Merged
[Data] Callback-based stat computation for preprocessors and ValueCounter#56848alexeykudinkin merged 9 commits intomasterfrom
alexeykudinkin merged 9 commits intomasterfrom
Conversation
![gemini-code-assist[bot]](proxy.php?url=https://avatars.githubusercontent.com/in/956858?s=60&v=4){kind=small}
Contributor
There was a problem hiding this comment.
Code Review
This pull request introduces a significant and valuable refactoring of the preprocessor statistics computation, moving to a callback-based StatComputationPlan. This greatly improves code organization and modularity. The addition of ValueCounter and new BlockColumnAccessor methods are also great enhancements.
My review focuses on ensuring the new architecture is correctly and consistently applied. I've found a few issues:
- A critical bug in
OneHotEncoder'smax_categorieslogic where it's applied per-batch instead of globally. - A bug in
ValueCounter'szero_factorythat would lead to aKeyError. - A method definition issue in
UniformKBinsDiscretizerthat would cause aTypeError. - Some preprocessors in
scaler.pywere missed in the refactoring and still use the olddataset.aggregatepattern.
Addressing these points will help solidify this excellent refactoring.
![cursor[bot]](proxy.php?url=https://avatars.githubusercontent.com/in/1210556?s=60&v=4){kind=small}
This comment was marked as outdated.
This comment was marked as outdated.
Sorry, something went wrong.
ray-gardener
bot
added
docs
This comment was marked as outdated.
This comment was marked as outdated.
Sorry, something went wrong.
alexeykudinkin
approved these changes
Sep 23, 2025
richardliaw
reviewed
Sep 29, 2025
| return {x} | ||
|
|
||
|
|
||
| class ValueCounter(AggregateFnV2): |
Contributor
There was a problem hiding this comment.
Is this plugged in properly? It's not called in Encoder codepath
|
This pull request has been automatically marked as stale because it has not had You can always ask for help on our discussion forum or Ray's public slack channel. If you'd like to keep this open, just leave any comment, and the stale label will be removed. |
github-actions
bot
added
the
stale
cem-anyscale
force-pushed
the
cem/callback_based_stats
branch
2 times, most recently
from
1dcabb6 to
a5ea0f4
Compare
This comment was marked as outdated.
This comment was marked as outdated.
Sorry, something went wrong.
github-actions
bot
added
unstale
cem-anyscale
force-pushed
the
cem/callback_based_stats
branch
3 times, most recently
from
a650d2c to
ee354a5
Compare
…nter * Updated preprocessors to use a callback-based approach for stat computation. This improves code organization and reduces duplication. * Added ValueCounter aggregator and value_counts method to BlockColumnAccessor. Includes implementations for both Arrow and Pandas backends. Signed-off-by: cem <[email protected]>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> Signed-off-by: cem-anyscale <[email protected]> Signed-off-by: cem <[email protected]>
Signed-off-by: cem <[email protected]>
Signed-off-by: cem <[email protected]>
Signed-off-by: cem <[email protected]>
Signed-off-by: cem <[email protected]>
Signed-off-by: cem <[email protected]>
Signed-off-by: cem <[email protected]>
Signed-off-by: cem <[email protected]>
cem-anyscale
force-pushed
the
cem/callback_based_stats
branch
from
ee354a5 to
1ae5182
Compare
kamil-kaczmarek
pushed a commit
that referenced
this pull request
Oct 20, 2025
…nter (#56848) * Updated preprocessors to use a callback-based approach for stat computation. This improves code organization and reduces duplication. * Added ValueCounter aggregator and value_counts method to BlockColumnAccessor. Includes implementations for both Arrow and Pandas backends. <!-- Thank you for your contribution! Please review https://github.com/ray-project/ray/blob/master/CONTRIBUTING.rst before opening a pull request. --> <!-- Please add a reviewer to the assignee section when you create a PR. If you don't have the access to it, we will shortly find a reviewer and assign them to your PR. --> ## Why are these changes needed? <!-- Please give a short summary of the change and the problem this solves. --> ## Related issue number <!-- For example: "Closes #1234" --> ## Checks - [ ] I've signed off every commit(by using the -s flag, i.e., `git commit -s`) in this PR. - [ ] I've run `scripts/format.sh` to lint the changes in this PR. - [ ] I've included any doc changes needed for https://docs.ray.io/en/master/. - [ ] I've added any new APIs to the API Reference. For example, if I added a method in Tune, I've added it in `doc/source/tune/api/` under the corresponding `.rst` file. - [ ] I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/ - Testing Strategy - [ ] Unit tests - [ ] Release tests - [ ] This PR is not tested :( --------- Signed-off-by: cem <[email protected]> Signed-off-by: cem-anyscale <[email protected]> Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> Signed-off-by: Kamil Kaczmarek <[email protected]>
kamil-kaczmarek
pushed a commit
that referenced
this pull request
Oct 20, 2025
…nter (#56848) * Updated preprocessors to use a callback-based approach for stat computation. This improves code organization and reduces duplication. * Added ValueCounter aggregator and value_counts method to BlockColumnAccessor. Includes implementations for both Arrow and Pandas backends. <!-- Thank you for your contribution! Please review https://github.com/ray-project/ray/blob/master/CONTRIBUTING.rst before opening a pull request. --> <!-- Please add a reviewer to the assignee section when you create a PR. If you don't have the access to it, we will shortly find a reviewer and assign them to your PR. --> ## Why are these changes needed? <!-- Please give a short summary of the change and the problem this solves. --> ## Related issue number <!-- For example: "Closes #1234" --> ## Checks - [ ] I've signed off every commit(by using the -s flag, i.e., `git commit -s`) in this PR. - [ ] I've run `scripts/format.sh` to lint the changes in this PR. - [ ] I've included any doc changes needed for https://docs.ray.io/en/master/. - [ ] I've added any new APIs to the API Reference. For example, if I added a method in Tune, I've added it in `doc/source/tune/api/` under the corresponding `.rst` file. - [ ] I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/ - Testing Strategy - [ ] Unit tests - [ ] Release tests - [ ] This PR is not tested :( --------- Signed-off-by: cem <[email protected]> Signed-off-by: cem-anyscale <[email protected]> Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> Signed-off-by: Kamil Kaczmarek <[email protected]>
xinyuangui2
pushed a commit
to xinyuangui2/ray
that referenced
this pull request
Oct 22, 2025
…nter (ray-project#56848) * Updated preprocessors to use a callback-based approach for stat computation. This improves code organization and reduces duplication. * Added ValueCounter aggregator and value_counts method to BlockColumnAccessor. Includes implementations for both Arrow and Pandas backends. <!-- Thank you for your contribution! Please review https://github.com/ray-project/ray/blob/master/CONTRIBUTING.rst before opening a pull request. --> <!-- Please add a reviewer to the assignee section when you create a PR. If you don't have the access to it, we will shortly find a reviewer and assign them to your PR. --> ## Why are these changes needed? <!-- Please give a short summary of the change and the problem this solves. --> ## Related issue number <!-- For example: "Closes ray-project#1234" --> ## Checks - [ ] I've signed off every commit(by using the -s flag, i.e., `git commit -s`) in this PR. - [ ] I've run `scripts/format.sh` to lint the changes in this PR. - [ ] I've included any doc changes needed for https://docs.ray.io/en/master/. - [ ] I've added any new APIs to the API Reference. For example, if I added a method in Tune, I've added it in `doc/source/tune/api/` under the corresponding `.rst` file. - [ ] I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/ - Testing Strategy - [ ] Unit tests - [ ] Release tests - [ ] This PR is not tested :( --------- Signed-off-by: cem <[email protected]> Signed-off-by: cem-anyscale <[email protected]> Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> Signed-off-by: xgui <[email protected]>
elliot-barn
pushed a commit
that referenced
this pull request
Oct 23, 2025
…nter (#56848) * Updated preprocessors to use a callback-based approach for stat computation. This improves code organization and reduces duplication. * Added ValueCounter aggregator and value_counts method to BlockColumnAccessor. Includes implementations for both Arrow and Pandas backends. <!-- Thank you for your contribution! Please review https://github.com/ray-project/ray/blob/master/CONTRIBUTING.rst before opening a pull request. --> <!-- Please add a reviewer to the assignee section when you create a PR. If you don't have the access to it, we will shortly find a reviewer and assign them to your PR. --> ## Why are these changes needed? <!-- Please give a short summary of the change and the problem this solves. --> ## Related issue number <!-- For example: "Closes #1234" --> ## Checks - [ ] I've signed off every commit(by using the -s flag, i.e., `git commit -s`) in this PR. - [ ] I've run `scripts/format.sh` to lint the changes in this PR. - [ ] I've included any doc changes needed for https://docs.ray.io/en/master/. - [ ] I've added any new APIs to the API Reference. For example, if I added a method in Tune, I've added it in `doc/source/tune/api/` under the corresponding `.rst` file. - [ ] I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/ - Testing Strategy - [ ] Unit tests - [ ] Release tests - [ ] This PR is not tested :( --------- Signed-off-by: cem <[email protected]> Signed-off-by: cem-anyscale <[email protected]> Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> Signed-off-by: elliot-barn <[email protected]>
landscapepainter
pushed a commit
to landscapepainter/ray
that referenced
this pull request
Nov 17, 2025
…nter (ray-project#56848) * Updated preprocessors to use a callback-based approach for stat computation. This improves code organization and reduces duplication. * Added ValueCounter aggregator and value_counts method to BlockColumnAccessor. Includes implementations for both Arrow and Pandas backends. <!-- Thank you for your contribution! Please review https://github.com/ray-project/ray/blob/master/CONTRIBUTING.rst before opening a pull request. --> <!-- Please add a reviewer to the assignee section when you create a PR. If you don't have the access to it, we will shortly find a reviewer and assign them to your PR. --> ## Why are these changes needed? <!-- Please give a short summary of the change and the problem this solves. --> ## Related issue number <!-- For example: "Closes ray-project#1234" --> ## Checks - [ ] I've signed off every commit(by using the -s flag, i.e., `git commit -s`) in this PR. - [ ] I've run `scripts/format.sh` to lint the changes in this PR. - [ ] I've included any doc changes needed for https://docs.ray.io/en/master/. - [ ] I've added any new APIs to the API Reference. For example, if I added a method in Tune, I've added it in `doc/source/tune/api/` under the corresponding `.rst` file. - [ ] I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/ - Testing Strategy - [ ] Unit tests - [ ] Release tests - [ ] This PR is not tested :( --------- Signed-off-by: cem <[email protected]> Signed-off-by: cem-anyscale <[email protected]> Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Aydin-ab
pushed a commit
to Aydin-ab/ray-aydin
that referenced
this pull request
Nov 19, 2025
…nter (ray-project#56848) * Updated preprocessors to use a callback-based approach for stat computation. This improves code organization and reduces duplication. * Added ValueCounter aggregator and value_counts method to BlockColumnAccessor. Includes implementations for both Arrow and Pandas backends. <!-- Thank you for your contribution! Please review https://github.com/ray-project/ray/blob/master/CONTRIBUTING.rst before opening a pull request. --> <!-- Please add a reviewer to the assignee section when you create a PR. If you don't have the access to it, we will shortly find a reviewer and assign them to your PR. --> ## Why are these changes needed? <!-- Please give a short summary of the change and the problem this solves. --> ## Related issue number <!-- For example: "Closes ray-project#1234" --> ## Checks - [ ] I've signed off every commit(by using the -s flag, i.e., `git commit -s`) in this PR. - [ ] I've run `scripts/format.sh` to lint the changes in this PR. - [ ] I've included any doc changes needed for https://docs.ray.io/en/master/. - [ ] I've added any new APIs to the API Reference. For example, if I added a method in Tune, I've added it in `doc/source/tune/api/` under the corresponding `.rst` file. - [ ] I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/ - Testing Strategy - [ ] Unit tests - [ ] Release tests - [ ] This PR is not tested :( --------- Signed-off-by: cem <[email protected]> Signed-off-by: cem-anyscale <[email protected]> Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> Signed-off-by: Aydin Abiar <[email protected]>
Future-Outlier
pushed a commit
to Future-Outlier/ray
that referenced
this pull request
Dec 7, 2025
…nter (ray-project#56848) * Updated preprocessors to use a callback-based approach for stat computation. This improves code organization and reduces duplication. * Added ValueCounter aggregator and value_counts method to BlockColumnAccessor. Includes implementations for both Arrow and Pandas backends. <!-- Thank you for your contribution! Please review https://github.com/ray-project/ray/blob/master/CONTRIBUTING.rst before opening a pull request. --> <!-- Please add a reviewer to the assignee section when you create a PR. If you don't have the access to it, we will shortly find a reviewer and assign them to your PR. --> ## Why are these changes needed? <!-- Please give a short summary of the change and the problem this solves. --> ## Related issue number <!-- For example: "Closes ray-project#1234" --> ## Checks - [ ] I've signed off every commit(by using the -s flag, i.e., `git commit -s`) in this PR. - [ ] I've run `scripts/format.sh` to lint the changes in this PR. - [ ] I've included any doc changes needed for https://docs.ray.io/en/master/. - [ ] I've added any new APIs to the API Reference. For example, if I added a method in Tune, I've added it in `doc/source/tune/api/` under the corresponding `.rst` file. - [ ] I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/ - Testing Strategy - [ ] Unit tests - [ ] Release tests - [ ] This PR is not tested :( --------- Signed-off-by: cem <[email protected]> Signed-off-by: cem-anyscale <[email protected]> Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> Signed-off-by: Future-Outlier <[email protected]>
Blaze-DSP
pushed a commit
to Blaze-DSP/ray
that referenced
this pull request
Dec 18, 2025
…nter (ray-project#56848) * Updated preprocessors to use a callback-based approach for stat computation. This improves code organization and reduces duplication. * Added ValueCounter aggregator and value_counts method to BlockColumnAccessor. Includes implementations for both Arrow and Pandas backends. <!-- Thank you for your contribution! Please review https://github.com/ray-project/ray/blob/master/CONTRIBUTING.rst before opening a pull request. --> <!-- Please add a reviewer to the assignee section when you create a PR. If you don't have the access to it, we will shortly find a reviewer and assign them to your PR. --> ## Why are these changes needed? <!-- Please give a short summary of the change and the problem this solves. --> ## Related issue number <!-- For example: "Closes ray-project#1234" --> ## Checks - [ ] I've signed off every commit(by using the -s flag, i.e., `git commit -s`) in this PR. - [ ] I've run `scripts/format.sh` to lint the changes in this PR. - [ ] I've included any doc changes needed for https://docs.ray.io/en/master/. - [ ] I've added any new APIs to the API Reference. For example, if I added a method in Tune, I've added it in `doc/source/tune/api/` under the corresponding `.rst` file. - [ ] I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/ - Testing Strategy - [ ] Unit tests - [ ] Release tests - [ ] This PR is not tested :( --------- Signed-off-by: cem <[email protected]> Signed-off-by: cem-anyscale <[email protected]> Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
peterxcli
pushed a commit
to peterxcli/ray
that referenced
this pull request
Feb 25, 2026
…nter (ray-project#56848) * Updated preprocessors to use a callback-based approach for stat computation. This improves code organization and reduces duplication. * Added ValueCounter aggregator and value_counts method to BlockColumnAccessor. Includes implementations for both Arrow and Pandas backends. <!-- Thank you for your contribution! Please review https://github.com/ray-project/ray/blob/master/CONTRIBUTING.rst before opening a pull request. --> <!-- Please add a reviewer to the assignee section when you create a PR. If you don't have the access to it, we will shortly find a reviewer and assign them to your PR. --> ## Why are these changes needed? <!-- Please give a short summary of the change and the problem this solves. --> ## Related issue number <!-- For example: "Closes ray-project#1234" --> ## Checks - [ ] I've signed off every commit(by using the -s flag, i.e., `git commit -s`) in this PR. - [ ] I've run `scripts/format.sh` to lint the changes in this PR. - [ ] I've included any doc changes needed for https://docs.ray.io/en/master/. - [ ] I've added any new APIs to the API Reference. For example, if I added a method in Tune, I've added it in `doc/source/tune/api/` under the corresponding `.rst` file. - [ ] I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/ - Testing Strategy - [ ] Unit tests - [ ] Release tests - [ ] This PR is not tested :( --------- Signed-off-by: cem <[email protected]> Signed-off-by: cem-anyscale <[email protected]> Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> Signed-off-by: peterxcli <[email protected]>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Why are these changes needed?
Related issue number
Checks
git commit -s) in this PR.scripts/format.shto lint the changes in this PR.method in Tune, I've added it in
doc/source/tune/api/under thecorresponding
.rstfile.