解决问题
r2_score函数输出值始终为0
解决方法
将 r2_score(test_y, test_predict) 改为 r2_score(test_y[0], test_predict[0])
def r2_score(y_true, y_pred, sample_weight=None,
multioutput="uniform_average"):
"""R^2 (coefficient of determination) regression score function.
Best possible score is 1.0 and it can be negative (because the
