How to copy data from memory to numpy array in Python

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

can you give a concrete code example?

Alex
– Alex

2012-11-14 15:56:10 +00:00
Commented Nov 14, 2012 at 15:56 — Alex
– Alex, Commented Nov 14, 2012 at 15:56

Calvin Cheng · Accepted Answer · 2012-11-14 16:05:31Z

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)

answered Nov 14, 2012 at 16:05

Calvin Cheng

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Alex I · Accepted Answer · 2012-11-16 01:03:02Z

0

If the data is packed in a buffer in native float format:

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

answered Nov 16, 2012 at 1:03

Alex I

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