删除具有相反元素的二维numpy数组中的行

import numpy as np

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

arr = arr[~np.all(arr == -arr, axis=1)]

print(arr)

import numpy as np

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

arr = arr[~np.all(arr == -arr, axis=1)]

print(arr)

[[1 2 3]
 [4 5 6]]