How does one find out the cv error from the sklearn package?

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I am trying to plot a learning curve to figure out whether my model is suffering from high bias, and to achieve this I would need to plot the training set errors versus the cross validation set errors. In Scikit Learn is there a way to get this information?

rscv_rfc = grid_search.RandomizedSearchCV(RandomForestClassifier(), param_grid, n_jobs=4, cv=10)

rscv_rfc gives me the best estimator etc., alongwith the best params for the model. Is there a way to receive the mean cv error from this object?

asked 11 secs ago

user3930246

16

How does one find out the cv error from the sklearn package?