model = XGBClassifier(silent=False, 
                      scale_pos_weight=1,
                      learning_rate=0.01,  
                      colsample_bytree = 0.4,
                      subsample = 0.8,
                      objective='binary:logistic', 
                      n_estimators=1000, 
                      reg_alpha = 0.3,
                      max_depth=4, 
                      gamma=10)