如何在Python中将数据从内存复制到numpy数组

Question

For example, I have a variable which point to a vector contains many elements in memory, I want to copy element in vector to a numpy array, what should I do except one by one copy? Thx

Answer 1

I am assuming that your vector can be represented like that:-

import array

x = array('l', [1, 3, 10, 5, 6])   # an array using python's built-in array module

Casting it as a numpy array will then be:-

import numpy as np

y = np.array(x)

Answer 2

如果数据以本机浮点格式打包在缓冲区中：

a = numpy.fromstring(buf, dtype=float, count=N)