Python/Numpy — NotImplementedError: memoryview slice assignments are currently restricted to ndim = 1

Asked Nov 04 '20 at 23:53

Active Nov 05 '20 at 02:10

Viewed 494 times

I'm trying to read a file and save to a numpy matrix to display it, but I'm stuck on an error.

from matplotlib import pyplot as plt
import numpy as np

image = np.empty((1664, 512, 256), np.uint16)

reader = open('Datasets/burned_wood_with_tape_1664x512x256_12bit.raw', "rb").read()

image.data[:] = reader

plt.imshow(image)

And this returns:

Traceback (most recent call last):
  File "[PATH]", line 8, in <module>
    image.data[:] = reader
NotImplementedError: memoryview slice assignments are currently restricted to ndim = 1

Any ideas of what's causing this error?

Edit:

I am using this SO question to write my program: read and display raw image using python

edited Nov 05 '20 at 02:10

asked Nov 04 '20 at 23:53

Raiyan Chowdhury

Did you try `image[:]`, because `image.data[:]` will return a pointer to the memory. I am assuming you will have to assign the value directly. – Anurag Reddy Nov 05 '20 at 00:07
Why are you trying to assign a value to `image.data`? Who or what suggested that? The `data` attribute of an array is a low level object that only the most advanced `numpy` programmers are allowed to touch :) – hpaulj Nov 05 '20 at 00:48
@AnuragReddy This just returns "Memory Error". – Raiyan Chowdhury Nov 05 '20 at 02:08
@hpaulj See my edit please. – Raiyan Chowdhury Nov 05 '20 at 02:10
@hpaulj Is there a way to assign it directly? Like iterate through the data and assign each index. – Raiyan Chowdhury Nov 05 '20 at 21:06

Python/Numpy — NotImplementedError: memoryview slice assignments are currently restricted to ndim = 1

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