combust/mleap

ReverseStringIndexer not supported in scikit learn

Open

#534 opened on Jun 19, 2019

View on GitHub
 (0 comments) (0 reactions) (0 assignees)Scala (1,461 stars) (312 forks)batch import
enhancementhelp wanted

Description

Since there doesn't seem to be a mention of the reverse_string_indexer in mleap/python/mleap/sklearn/preprocessing/, I don't believe the ReverseStringIndexer is currently supported for sklearn.

Contributor guide

Tech stack
pythonscalascikit learn
Domain
datamachine learning
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Basic knowledge of MLeapFamiliarity with scikit learn transformers
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
Investigate the existing transformer support in mleap/python/mleap/sklearn/preprocessing/ to understand the pattern for adding new transformers. Look at how other transformers like StringIndexer are implemented. Then implement ReverseStringIndexer following the same pattern, ensuring serialization/deserialization in both sklearn and MLeap bundles.