huaxingao opened a new pull request #26489: [SPARK-29876][ML][PYTHON] Add __repr__ in Python ML Models URL: https://github.com/apache/spark/pull/26489 ### What changes were proposed in this pull request? Add ```__repr__``` in Python ML Models ### Why are the changes needed? In Python ML Models, some of them have ```__repr__```, others don't. In the doctest, when calling Model.setXXX, some of the Models print out the xxxModel... correctly, some of them can't because of lacking the ```__repr__``` method. For example: ``` >>> gm = GaussianMixture(k=3, tol=0.0001, seed=10) >>> model = gm.fit(df) >>> model.setPredictionCol("newPrediction") GaussianMixture... ``` After the change, the above code will become the following: ``` >>> gm = GaussianMixture(k=3, tol=0.0001, seed=10) >>> model = gm.fit(df) >>> model.setPredictionCol("newPrediction") GaussianMixtureModel... ``` ### Does this PR introduce any user-facing change? Yes. ### How was this patch tested? doctest
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