作业：K-means算法应用：图片压缩

from sklearn.datasets import load_sample_image
from sklearn.cluster import KMeans
import matplotlib.pyplot as plt
 
#读取一张示例图片或自己准备的图片，观察图片存放数据特点
china = load_sample_image("china.jpg")
plt.imshow(china)
plt.show()
print(china.shape)
from sklearn.datasets import load_sample_ima