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Migrate WoEEncoder to narwhals, add polars support - #1032

Merged

solegalli merged 7 commits into

narwhals-migrationfrom

narwhals-woe-encoder

Sep 15, 2026

Merged

Migrate WoEEncoder to narwhals, add polars support#1032
solegalli merged 7 commits into
narwhals-migrationfrom
narwhals-woe-encoder

Commits on Sep 15, 2026
- Migrate WoEEncoder to narwhals, add polars support
  
  solegalli
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  claude
  committed
  ba33564
- Adapt WoEEncoder to narwhals-returning check_X
  
  solegalli
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  f132b5f
- Use shared backend test fixtures and helpers in WoEEncoder tests
  
  solegalli
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  fc25eb3
- Use frame_to_dict after the shared helper rename in #1045
  
  solegalli
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  1a60ca8
- Use add_target_to_X in WoEEncoder, group init tests, match errors
  
  solegalli
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  4acf874
- Compute WoE with narwhals in _calculate_woe, shared by WoEEncoder and SelectByInformationValue
  
  solegalli
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  claude
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  f88de40
- Replace zero counts by 0.5 in WoE, remove fill_value, add variables_with_zero_counts_
  
  solegalli
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  claude
  committed
  b5cb287