单括号和双括号Numpy数组的区别? [英] Difference between single and double bracket Numpy array?

问题描述

这两个 numpy 对象有什么区别?

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])

推荐答案

In [71]: np.array([[0,0,0,0]]).shape
Out[71]: (1, 4)

In [72]: np.array([0,0,0,0]).shape
Out[72]: (4,)

前者是一个 1 x 4 的二维数组，后者是一个 4 元素的一维数组.

The former is a 1 x 4 two-dimensional array, the latter a 4 element one-dimensional array.

这篇关于单括号和双括号Numpy数组的区别?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！