Difference between single and double bracket Numpy array?

Question

What is the difference between these two numpy objects?

import numpy as np
np.array([[0,0,0,0]])
np.array([0,0,0,0])

Answer 1

When you defined an array with two brackets, what you were really doing was declaring an array with an array with 4 0's inside. Therefore, if you wanted to access the first zero you would be accessing your_array[0][0] while in the second array you would just be accessing your array[0]. Perhaps a better way to visualize it is

array: [
[0,0,0,0],
]

vs

array: [0,0,0,0]