How to suppress matlab output from python

Question

Suppose that you have the following .m script:

% foo.m
function foo = run()
    disp(\'Hello!!\');
    foo = 1;
end

Now, you execute foo.m

Answer 1

I answer my question.

I didn't read carefully the matlab documentation about the Python API. Following the instruction at this page, the correct answer to my question is:

import matlab.engine
import io

eng = matlab.engine.start_matlab(stdout=io.StringIO())
py_foo = eng.foo()

Out:

// no output! :D

Just in case you are using exec() (and be very sure about user inputs in this case), remember to import io inside the string passed to exec(), i.e.:

import matlab.engine
import io // this is useless!!

eng = matlab.engine.start_matlab()
str = "import io;eng.foo(stdout=io.stringIO())" // put it here
loc = {}
exec(str, {"eng" : eng}, loc)
py_foo = loc["foo"]