循环中出现错误“无法分配给函数调用”

Question

# filter image
img_corners = np.zeros((np.size(img,0),np.size(img,1)))
for templete_class in range (1,np.size(templete_props,0)):

    # create correlation templete
    # width and height
    width  = (templete_props[templete_class][2])*2+1
    height = (templete_props[templete_class][2])*2+1

    # initialize templete
    templete_a1 = np.zeros((height,width),np.float)
    templete_a2 = np.zeros((height,width),np.float)
    templete_b1 = np.zeros((height,width),np.float)
    templete_b2 = np.zeros((height,width),np.float)

    # midpoint
    mu = (templete_props[templete_class][2])+1
    mv = (templete_props[templete_class][2])+1

    # compute normals from angles
    n1 = np.array([-math.sin(templete_props[templete_class][0]), math.cos(templete_props[templete_class][0])])
    n2 = np.array([-math.sin(templete_props[templete_class][1]), math.cos(templete_props[templete_class][1])])

    # compute normals from angles do
    for u in range (1, width):
        for v in range (1, height):

            # vector
            vec  = np.array([u-mu+1, v-mv+1])
            dist = np.linalg.norm(vec)

            # check on which side of the normals we are
            n1_t = n1.reshape(-1,1)
            s1 = vec@n1_t
            n2_t = n2.reshape(-1,1)
            s2 = vec@n2_t

            if s1<=-0.1 and s2<=-0.1:
                templete_a1(v,u) = stats.norm.pdf(dist,0,(templete_props[templete_class][2])/2)
            elif s1>=0.1 and s2>=0.1:
                templete_a2(v,u) = stats.norm.pdf(dist,0,(templete_props[templete_class][2])/2)
            elif s1<=-0.1 and s2>=0.1:
                templete_b1(v,u) = stats.norm.pdf(dist,0,(templete_props[templete_class][2])/2)
            elif s1>=0.1 and s2<=-0.1:
                templete_b2(v,u) = stats.norm.pdf(dist,0,(templete_props[templete_class][2])/2)

此编码用于将s1和s2的某个值/范围归类为特定模板（编码的最后一部分）。但是，有些错误我无法解决。错误如下：

“无法分配给函数调用”

任何人，您对此有任何想法吗？我是python的新手。谢谢你。