Question: How to get the value of the fitted pipeline's best internal CV score from training?

As it trains, I know it displays the current best CV score, but is there a way to pull that value into a variable? What I have set up is a For loop that runs 5 different TPOT sessions, using 5 different combinations of features in the training set, and I would like to create a sort of "ensemble'd" prediction by taking the predictions of each session's best pipeline, and then weighting those predictions based on the training score it received. Thanks!