np.savetxt('test_labels.csv', y_test,
fmt='%i', delimiter=',')
一旦将数据集保存为 CSV 文件, 我们也可以用 NumPy 的 genfromtxt...函数重新将它们加载入程序中:
X_train = np.genfromtxt('train_img.csv',
dtype=int, delimiter...=',')
y_train = np.genfromtxt('train_labels.csv',
dtype=int, delimiter=',')
X_test...= np.genfromtxt('test_img.csv',
dtype=int, delimiter=',')
y_test = np.genfromtxt