MATLAB Engine API for Python: MATLAB struct

I am using the MATLAB Engine API for Python. MATLAB version is 2018a, Python version is 3.6.6, and I am running on Linux.

For the first time in my experience, I am invoking a MATLAB function that returns a MATLAB struct, with the intention of processing it as a dict. But I am getting

TypeError: unsupported data type returned from MATLAB

Short of returning the fields as separate arguments, is there a way to return a MATLAB struct? I know that at one time is was unsupported, and would appreciate a workaround if this is still the case.

Here is the first line of the MATLAB function:

function [ ptm ] = multitrain( datamat, configin, buffersize )

and here is the invocation:

ptm = eng.multitrain(ml_list,'outputfilename',50.0,nargout=1)

Answer 1

[Sean Holden]

What are the data types of the fields inside the struct? A struct itself will map to a Python dict, so the error is probably coming from an unsupported field type (e.g. a Cell array).

More info about supported data types from MATLAB to Python can be found in the Engine API docs.