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[python][sklearn] Allow non-serializable objects in callbacks argument #4723

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Oct 27, 2021
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[python][sklearn] Allow non-serializable objects in callbacks argument #4723

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2 changes: 1 addition & 1 deletion python-package/lightgbm/sklearn.py
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Original file line number Diff line number Diff line change
Expand Up @@ -730,7 +730,7 @@ def _get_meta_data(collection, name, i):
if callbacks is None:
callbacks = []
else:
callbacks = copy.deepcopy(callbacks)
callbacks = copy.copy(callbacks) # don't use deepcopy here to allow non-serializable objects

if verbose != 'warn':
_log_warning("'verbose' argument is deprecated and will be removed in a future release of LightGBM. "
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