J'ai essayé d'implémenter ce code dans python 2.7. Cela me donne cette erreur. J'apprécierais l'aide. Je dernière version de sklearn (0.18.1) et xgboost (0,6)xgboost.cv donne TypeError: L'objet 'StratifiedKFold' n'est pas itérable
import xgboost as xgb
from sklearn.model_selection import StratifiedKFold
from sklearn.metrics import f1_score, roc_auc_score, confusion_matrix
nfold = 3
kf = StratifiedKFold(nfold, shuffle=True)
dtrain = xgb.DMatrix(x_train, label=y_train)
dtest = xgb.DMatrix(x_test)
params = {
'objective' : 'binary:logistic',
'eval_metric': 'auc',
'min_child_weight':10,
'scale_pos_weight':scale,
}
hist = xgb.cv(params, dtrain, num_boost_round=10000, folds=kf, early_stopping_rounds=50, as_pandas=True, verbose_eval=100, show_stdv=True, seed=0)
Je reçois cette erreur:
TypeErrorTraceback (most recent call last)
<ipython-input-52-41c415e116d7> in <module>()
5 'scale_pos_weight':scale,
6 }
----> 7 hist = xgb.cv(params, dtrain, num_boost_round=10000, folds=kf, early_stopping_rounds=50, as_pandas=True, verbose_eval=100, show_stdv=True, seed=0)
8
9
/opt/conda/lib/python2.7/site-packages/xgboost/training.pyc in cv(params, dtrain, num_boost_round, nfold, stratified, folds, metrics, obj, feval, maximize, early_stopping_rounds, fpreproc, as_pandas, verbose_eval, show_stdv, seed, callbacks)
369
370 results = {}
--> 371 cvfolds = mknfold(dtrain, nfold, params, seed, metrics, fpreproc, stratified, folds)
372
373 # setup callbacks
/opt/conda/lib/python2.7/site-packages/xgboost/training.pyc in mknfold(dall, nfold, param, seed, evals, fpreproc, stratified, folds)
236 idset = [randidx[(i * kstep): min(len(randidx), (i + 1) * kstep)] for i in range(nfold)]
237 elif folds is not None:
--> 238 idset = [x[1] for x in folds]
239 nfold = len(idset)
240 else:
TypeError: 'StratifiedKFold' object is not iterable