Matlab-python interface broken ?

Hello,

I was experimenting with the Matlab-python interface and it seems there are serious issues.

Here are two very simple things I tried:

matrix = py.numpy.zeros(int32([3 3]))
py.scipy.linalg.det(matrix)

and it outputs 1. Actually it outputs 1 for any matrix

On the other side if I use

py.numpy.linalg.det(matrix)

I get a bunch of segmentation falt and illegal instruction errors.

When I do it with a python interpreter (in the same terminal I started Matlab to make sure i have the same environment) the code works properly.

Does anyone have the same behavior or is that my environment is somehow broken ?

Thank you for your help

Answer 1

[Robert Snoeberger]

When python is running within MATLAB, it ends up using MATLAB's MKL. It looks like your Python code is incompatible with MATLAB's MKL, probably due to incompatible compile-time options.

If you are on linux, then a workaround [1] to try is the following:

>> flag = int32(bitor(2, 8));
>> py.sys.setdlopenflags(flag);

Run this code after you start MATLAB.

1. https://www.mathworks.com/matlabcentral/answers/265247-importing-custom-python-module-fails

[Guillaume Leclerc]

This is AWESOME. Thank you for your help. Too bad I struggled days with the email support team for such a simple workaround.

Have a nice day

[Pierre Loicq]

Wow, this solution resolved a similar problem on matlab 2016b on linux (crash with segmentation faults and malloc errors).

Thank you very much