我试图使我的代码更高效，如果有更好的方法实现相同的结果，我就很伤心。
import numpy as np
n = 100
arr2D = np.empty((n,n)) #Lets assume its filled with relevant data
arr3D = np.empty((n,n,3))
for i in range(n):
for j in range(n):
arr3D[i,j,0] = arr2D[i,j]
arr3D[i,1] = arr2D[i,2] = arr2D[i,j]
我基本上是在尝试用2D数组值填充3D数组。