scipy模块使用logsumexp

#logsumexp是先对矩阵以e次方求和取对数
from scipy.special import logsumexp
import numpy as np
a=np.arange(10)
print(np.log(np.sum(np.exp(a))))
#9.45862974442671
print(logsumexp(a))
#9.45862974442671