MATLAB not converting 2D arrays to Python arrays. "No module named 'libmwbuffer'" error.

Hello,

I am trying to use Python with MATLAB. I am unable to pass certain MATLAB variables, namely arrays of 2 or more dimensions.

An excerpt of my code:

pyenv; % Version 3.8

np = py.importlib.import_module('numpy');

a = [1 2; 3 4];
a_py = np.array(a)

I get the error:

% Python Error: ModuleNotFoundError: No module named
% 'libmwbuffer'
%  Python function '' might not be able to accept at least one
%  input argument at position 1. The function may require a
%  specific data type that you can construct from the MATLAB
%  array. For more information, see the documentation for
%  Python function '' and working with Python arrays.

Does anyone know what I am doing wrong? Do I have to install additional modules? Should I change my version of Python?

Thank you.

Answer 1

[Abhinav Gupta]

Hi,

I think this issue occured because of unsupported version of Python on your system. You could refer to the links below to install Matlab-supported Python version in accordance with your Matlab version.

Microsoft Word - python-compatibility.docx (mathworks.com)

System Requirements for MATLAB Engine API for Python - MATLAB & Simulink - MathWorks India

Hope it helps.

[José Felgueiras]

Thank you for the reply.

Python version 3.8 is compatible with R2020b, not R2020a. That is why it was failing.

Downgrading to 3.7 fixed it.