param_grid = {'preprocessing': [MinMaxScaler(),
                                QuantileTransformer(output_distribution="uniform",n_quantiles=20)],
              'feature_selection':[SelectFromModel(LogisticRegression(solver="liblinear",penalty='l2',C=1),max_features=9),
                                   .....,
                                   SelectFromModel(LogisticRegression(solver="liblinear",penalty='l2',C=1),max_features=18),
                                   PCA(n_components=9,random_state=17),
                                   .....,
                                   PCA(n_components=18,random_state=17)],
              'classifier__alpha':[0.1,1.0,10,100],
              'classifier__l1_ratio':[0,0.25,0.5,0.75,1]}