How can I create a DLL that can be called from Python 2.6 under win32?

Hi there!

I have a function:

function [y] = add2(x)

y = x+2;

end;

I want to call it as a DLL from Python 2.6 under win32. I used the Matlab Compiler to build the .NET Assembly 'add2.dll'. Then I tried the following Python code:

from ctypes import*

mydll = windll.LoadLibrary("C:\\...\\add2.dll")

mydll.add2(5)

It answered: AttributeError: function 'add2' not found

What would be a problem? Did I use a wrong Compiler?

On the other hand, I can call standard Matlab functions using COM interface:

import win32com.client

h = win32com.client.Dispatch('matlab.application')

h.Execute("mpower(2,3)")

It works well and results in 8. Is there a similar way to call my 'add2' function?

TIA

Answer 1

[Claire]

Hi there,

Did you get any further with this? I'm hoping to try a similar implementation myself and it would be great to know if its even possible before I start.

Claire

Answer 2

[Cavalera]

Hi there,

The DLL is dependant of the Matlab Compiler Runtime (MCR). The MCR has to be launched before you call your function add2 function. More over, it is not possible to call your Matlab code directly inside Python. You should write a C or C++ wrapper in order to pass your function add2 to Python.

I can help if you have questions

Hugo Cavalera R&D engineer at Inria

[Michele Manfredda]

Can you better comment your answer? I could not find anything more in the web and this was the first clue.

1) how do you launch the mcr? 2) Why do you need a wrapper? What is the reason? 3) Can you post an example? :-)

[Rafael Fietzek]

We are doing the same basically, Any luck getting it works?