构建一个 function，它采用二维数组并在 python 中打印平均值

Question

I need a way to build a function that takes a 2d array and prints the average, using numpy.

how do I do that?

thanks!

Answer 1

Is it a numpy array? If so, you could just use

arr.mean()

if it is just a nested list, you could turn in into numpy array first

np_arr = np.array(arr)
np_arr.mean()