import numpy as np
x1 = np.random.randint(10, size=6) #一维数组
x2 = np.random.randint(10, size=(3, 4)) #二维数组
x3 = np.random.randint(10, size=(3, 4, 5)) #三维数组
#数组的维度
print("x3 ndim:", x3.ndim) #x3 ndim: 3
#数组每个维度的大小
print("x3 shape:", x3.shape) #x3 shape: (3, 4, 5)
#数组的总大小(个数)
print("x3 size:", x3.size) #x3 size: 60
#数组数据类型
print("x3 dtype:", x3.dtype) #x3 dtype: int32
#数组元素字节大小
print("x3 item size:", x3.itemsize) #x3 item size: 4
#数组总字段大小
print("x3 nbytes:", x3.nbytes) #x3 nbytes: 240