np.zeros

import numpy as np
dimensions = (3, 3)
np.zeros(dimensions) # 3x3 zeros matrix

np.zeros((dimension_1, dimension_2))

>>> np.zeros((2, 1))
array([[ 0.],
       [ 0.]])

>>> s = (3,3)
>>> np.zeros(s)
array([[ 0.,  0.],
       [ 0.,  0.]])