Call Python class from MATLAB

Hello,

Is it possible to call a Python class from MATLAB ? I found how to call Python functions in a .py file but not really how to deal with class.

For example, how to get/set the attribute of the following class and use its method from MATLAB:

class MyClass:
    """A simple example class"""
    i = 12345

      def f(self):
          return 'hello world'

Thank you in advance for any advice/help.

[Hisham Assi]

Hi Mathieu,

I have the same questiion; did you figure it out?

Thanks,

Hisham.

Answer 1

[Hans-Joachim Steinort]

This answer might be plentifully late, but I currently stumble across the same topic, so for anybody who needs this in the future:

I copied your example class to a python-file named Test_Py.py in my current folder.

Then you first create a matlab object like so:

pyClass = py.Test_Py.MyClass

Th function call then is pretty straight forward:

s = pyClass.f;

S is now an object Python str with no properties as displayed if you simply use the disp(s) command

>> disp(s)
  Python str with no properties.

    hello world

Matlab provides an internal conversion between python data types and Matlab datatypes (see Documentation). This creates the desired output:

>> disp(string(s))
hello world

[nanren888]

Unable to resolve the name py.Test_Py.MyClass.

The function examples from the "Call User-Defined Python Module" work fine.

As soon as there's a class in the file, I get nothing but "Unable to resolve".

Has there been a change?

There's something really obvious missing?

[nanren888]

Resolved, probably.

Found

py.importlib.import_module('Test_Py') - to actually produce a useful error.

And seems caught by the old copy-paste from website example produces inconsistent indentation problem.

I so like languages with syntax relying on invisibles. :)