Scipy.sparse矩陣的存儲，讀取和轉化為稠密矩陣

import numpy as np
import scipy.sparse as sp


m = sp.lil_matrix((7329,7329))
np.save(path,m)   #用numpy的load方法存儲矩陣，path為存儲的路徑


mat = np.load(path)[()] #讀取存儲的矩陣，注意[()]這個符號可以抽取對象

mat = mat.toarray() #將稀疏矩陣轉為稠密矩陣