[Neural Networks] Keras有內建MNIST資料嗎？

剛安裝完Keras後，很快就會發覺沒有一個sample code附上data set，而安裝資料夾("lib/python2.7/site-packages/keras/")內的檔案大小都只有十幾KB。

仔細看完code後可以猜出來MNIST data set是從網路硬碟下載來的


原始example code:
https://github.com/fchollet/keras/blob/master/examples/mnist_mlp.py

	from keras.datasets import mnist
	from keras.models import Sequential

繼續往下追可以知道 "lib/python2.7/site-packages/keras/datasets/mnist.py"裡面是從AWS S3網路硬碟下載來的

path = get_file(path, origin='https://s3.amazonaws.com/img-datasets/mnist.npz')


下載完後，馬上將training data和test data取出

    f = np.load(path)

    x_train = f['x_train']

    y_train = f['y_train']

    x_test = f['x_test']

    y_test = f['y_test']