Problem with BalancedBaggingClassifier inside GridSearchCV

[shahlaebrahimi]

Sorry, if BalancedBaggingClassifier will be used inside GridSearchCV, this error is reported:
ValueError: The target 'y' needs to have more than 1 class. Got 1 class instead
Thanks in advance.
Best regards,

[glemaitre]

Can you provide a stand-alone script to reproduce the problem ? Please read https://stackoverflow.com/help/mcve.
Also for future reference, can you paste the output of:

import platform; print(platform.platform())
import sys; print("Python", sys.version)
import numpy; print("NumPy", numpy.__version__)
import scipy; print("SciPy", scipy.__version__)
import sklearn; print("Scikit-Learn", sklearn.__version__)

[shahlaebrahimi]

@glemaitre Thanks. I am so sorry but I couldn't reproduce it using any available data sets. In fact, it is occurred while I set some specific parameters.