Python 例10-1 创建数组并查看数组属性。

import numpy as np

arr1 = np.array([1, 2, 3, 4])
print("数组的尺寸：", np.shape(arr1))

arr2 = np.array([[1, 2, 3, 4], [4, 5, 6, 7], [7, 8, 9, 10]])
print("数组的尺寸：", np.shape(arr2))
arr2.shape[0]
arr2.shape[1]