huaxingao opened a new pull request #26739: [SPARK-29967][ML][PYTHON] KMeans 
support instance weighting
URL: https://github.com/apache/spark/pull/26739
 
 
   ### What changes were proposed in this pull request?
   add weight support in KMeans
   ### Why are the changes needed?
   KMeans should support weighting
   ### Does this PR introduce any user-facing change?
   Yes. ```KMeans.setWeightCol```
   
   ### How was this patch tested?
   Unit Tests

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