load.py 文件源码

def mnist():
    fd = open(os.path.join(data_dir, 'train-images-idx3-ubyte'))
    loaded = np.fromfile(file=fd, dtype=np.uint8)
    trX = loaded[16:].reshape((60000, 28 * 28)).astype(float)

    fd = open(os.path.join(data_dir, 'train-labels-idx1-ubyte'))
    loaded = np.fromfile(file=fd, dtype=np.uint8)
    trY = loaded[8:].reshape((60000))

    fd = open(os.path.join(data_dir, 't10k-images-idx3-ubyte'))
    loaded = np.fromfile(file=fd, dtype=np.uint8)
    teX = loaded[16:].reshape((10000, 28 * 28)).astype(float)

    fd = open(os.path.join(data_dir, 't10k-labels-idx1-ubyte'))
    loaded = np.fromfile(file=fd, dtype=np.uint8)
    teY = loaded[8:].reshape((10000))

    trY = np.asarray(trY)
    teY = np.asarray(teY)

    return trX, teX, trY, teY