如何向pad numpy数组添加新的行和列

import numpy as np

arr = np.array([[1, 2, 3], [4, 5, 6]])

new_row = np.array([7, 8, 9])
arr = np.vstack((arr, new_row))

new_col = np.array([[10], [11]])
arr = np.hstack((arr, new_col))

print(arr)

import numpy as np

arr = np.array([[1, 2, 3], [4, 5, 6]])
new_row = np.array([7, 8, 9])
arr = np.vstack((arr, new_row))
new_col = np.array([[10], [11]])
arr = np.hstack((arr, new_col))
print(arr)