I using python with numpy to create an array filled with numbers from tuple, and set it up to be 4×4 matrix.

numbers = (-8, -3, -5, 0, 4, 5, 6, 10, 7,8, 9, 100, 10, 11, 12, 1000)
numbers_array = np.array(numbers).reshape(4, 4)

Then try to set insert x quantity of zeros before the last element of each row.

zeros_array = np.zeros((1,7))
numbers_final_array = np.insert(numbers_array, -1, zeros_array, 1)
print('numbers_final_arrayn', numbers_final_array)

When I declare the zeros_array in that way I get the ValueError. However I the declare the zeros_array like this:

zeros_array = np.zeros((7,1))

It does work, isn’t it weird?
why does it happen?

I was expecting something like this at the first try.

numbers_final_array
 [[  -8   -3   -5    0    0    0    0    0    0    0    0]
 [   4    5    6    0    0    0    0    0    0    0   10]
 [   7    8    9    0    0    0    0    0    0    0  100]
 [  10   11   12    0    0    0    0    0    0    0 1000]]