How To Suppress Matlab Output From Python

Suppose that you have the following .m script: % foo.m function foo = run() disp('Hello!!'); foo = 1; end Now, you execute foo.m from python with: import matlab.engine eng

Solution 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
importioeng= 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"]