import numpy as np

Create an array of Zeros

np.zeros((3,4)) # 3x4

array([[0., 0., 0., 0.],
       [0., 0., 0., 0.],
       [0., 0., 0., 0.]])

Create an array of ones

np.ones((2,3,4),dtype=np.int16) #2x3x4

array([[[1, 1, 1, 1],
        [1, 1, 1, 1],
        [1, 1, 1, 1]],

       [[1, 1, 1, 1],
        [1, 1, 1, 1],
        [1, 1, 1, 1]]], dtype=int16)

Create an array of evenly

# array range 10 to 25
np.arange(10,25) 

array([10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24])

# array range 10 to 25 incremant by 5
np.arange(10,25,5)

array([10, 15, 20])

Spaced values

np.linspace(0, 2, 9)

array([0.  , 0.25, 0.5 , 0.75, 1.  , 1.25, 1.5 , 1.75, 2.  ])

Create a constant array

# array of 2X2 value of 4
np.full((2, 2), 4)

array([[4, 4],
       [4, 4]])

Create a identity matrix

# Identity matrix of 2X2
np.eye(2)

array([[1., 0.],
       [0., 1.]])

Create an array with random values

# 2x2 matrix of random values
np.random.random((2,2))

array([[0.4825663 , 0.8771236 ],
       [0.1197411 , 0.07159758]])

Create an empty array

# 3x2 matrix of empty values
np.empty((3, 2))

array([[4.64407429e-310, 0.00000000e+000],
       [0.00000000e+000, 0.00000000e+000],
       [0.00000000e+000, 0.00000000e+000]])