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Oct 23rd, 2019
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  1. cv_result = lgb.cv(
  2. params,
  3. train,
  4. num_boost_round=num_boost_rounds,
  5. fobj = focal_loss,
  6. feval = lgb_focal_f1_score,
  7. nfold=3,
  8. stratified=True,
  9. early_stopping_rounds=20)
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