Straight to the code.
x = (shape=[0, 4], int) x = (x, [[1,2,3,4]], axis = 0) x = (x, [[1,2,3,4]], axis = 0)
This adds two rows and four columns of data. Note that append is two layers of brackets, this is very important, if you miss it is not a two-dimensional array, with axis will be reported when the dimension does not match.
The above method of adding elements to an empty two-dimensional array by numpy is all that I have shared with you, and I hope that it will give you a reference, and I hope that you will support me more.