python skimage 不显示图片

from skimage import io, data
from skimage import data_dir


print(data_dir)
img = data.horse()
io.imshow(img)
print(img.shape)

以上代码运行后在ubuntu里可能不显示图片，加上io.show()即可

from skimage import io, data
from skimage import data_dir


print(data_dir)
img = data.horse()
io.imshow(img)
io.show()
print(img.shape)