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Migrate OrdinalEncoder.fit() to narwhals, add polars support - #1029

Merged

solegalli merged 7 commits into

narwhals-migrationfrom

narwhals-ordinal-encoder

Sep 15, 2026

Merged

Migrate OrdinalEncoder.fit() to narwhals, add polars support#1029
solegalli merged 7 commits into
narwhals-migrationfrom
narwhals-ordinal-encoder

Commits on Sep 15, 2026
- Migrate OrdinalEncoder.fit() to narwhals, add polars support
  
  solegalli
  and
  claude
  committed
  29c7fa3
- Adapt OrdinalEncoder to narwhals-returning check_X
  
  solegalli
  and
  claude
  committed
  07a34ab
- Use shared backend test fixtures and helpers in OrdinalEncoder tests
  
  solegalli
  and
  claude
  committed
  aaaa431
- Use frame_to_dict after the shared helper rename in #1045
  
  solegalli
  and
  claude
  committed
  60840e5
- refactor code
  solegalli
  committed
  5705486
- Check encoding_method type, simplify OrdinalEncoder fit, group init tests
  
  solegalli
  and
  claude
  committed
  d997460
- Use add_target_to_X in OrdinalEncoder
  
  solegalli
  and
  claude
  committed
  45b0067