Conversion from Numpy array to MATLAB double

[rebeccafair]

Using Python 3.8 and MATLAB R2021b on IDAaaS (EL7) I get the following error when trying to convert from a Numpy to MATLAB array:

Whereas using Python 3.8 and MATLAB R2021b on my local Windows machine it works fine, and the way the Numpy array is represented seems to be completely different:

It seems we can't just tell from the MATLAB version whether double will work or not. There is an alternative py.array.array('d', x) which seems to work, but I don't know how slow it is. We should probably do a try/catch and only if double doesn't work try the other way.