我认为，更简单，更快速的启动方法是执行以下操作：
import numpy as npN = 10a = np.random.rand(N,N)b = np.zeros((N,N+1))b[:,:-1] = a
和时间：
In [23]: N = 10In [24]: a = np.random.rand(N,N)In [25]: %timeit b = np.hstack((a,np.zeros((a.shape[0],1))))10000 loops, best of 3: 19.6 us per loopIn [27]: %timeit b = np.zeros((a.shape[0],a.shape[1]+1)); b[:,:-1] = a100000 loops, best of 3: 5.62 us per loop
