如何从 numpy 数组中减去一个常数，然后将结果相加？

Question

How do one subtract a constant from every element in a list and then sum up the result in Python? Code attached does not work:

an_array = np.array([2,4,6,5,8,10])
constant = np.mean(an_array)

result = np.sum(an_array - constant)

Answer 1

np.sum(an_array)-constant*an_array.size

Edit 1:

I am a few seconds late as @Qui already pointed this solution out in the comments.