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cv: fixed devision by zero exception

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- show_progress=False or show_progress=0 led to devision by zero exception
This commit is contained in:
FrozenFingerz 2015-12-27 13:54:52 +01:00
parent 9f62553f23
commit 38b773d80b
1 changed files with 4 additions and 3 deletions
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7
python-package/xgboost/training.py
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@ -337,7 +337,8 @@ def aggcv(rlist, show_stdv=True, show_progress=None, as_pandas=True, trial=0):
if show_progress is None: if show_progress is None:
show_progress = True show_progress = True
if (isinstance(show_progress, int) and trial % show_progress == 0) or (isinstance(show_progress, bool) and show_progress): if (isinstance(show_progress, int) and show_progress > 0 and trial % show_progress == 0) or \
(isinstance(show_progress, bool) and show_progress):
sys.stderr.write(msg + '\n') sys.stderr.write(msg + '\n')
sys.stderr.flush() sys.stderr.flush()
@ -432,10 +433,10 @@ def cv(params, dtrain, num_boost_round=10, nfold=3, metrics=(),
best_score = score best_score = score
best_score_i = i best_score_i = i
elif i - best_score_i >= early_stopping_rounds: elif i - best_score_i >= early_stopping_rounds:
sys.stderr.write("Stopping. Best iteration: {}\n".format(best_score_i))
results = results[:best_score_i+1] results = results[:best_score_i+1]
sys.stderr.write("Stopping. Best iteration: {} (mean: {}, std: {})\n".
format(best_score_i, results[-1][0], results[-1][1]))
break break
if as_pandas: if as_pandas:
try: try:
import pandas as pd import pandas as pd