xgboost.cv TypeError: cv() got multiple values for argument 'dtrain'

user_17329958 0
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Im trying to manually test different hyperparameters for xgboost, but this error keeps coming. I'm not sure how im supplying multiple arguments to dtrain if it ends with a comma.

import xgboost as xgb
dtrain = xgb.DMatrix(X, label=y)
params = {'eta':[0.1]}
xgb_cv = xgb.cv(
    {'disable_default_eval_metric': 1},
    params,
    dtrain=dtrain,
    seed=1,
    nfold=5,
    custom_metric=f1_score
)
xgboost decision-tree machine-learning python
1 Answers

The signature for xgboost.cv is (params, dtrain, ...). So it thinks you're passing the metric-disabling-dict as params, the eta-dict as dtrain, and then trying to pass another dtrain by keyword. If disable_default_eval_metric is supposed to be another parameter, add it to the params dictionary that contains eta instead.

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