Main Content

Create Python Application with Multiple MATLAB Functions

Supported platforms: Windows®, Linux®, Mac

This example shows how to create a Python® application that uses multiple MATLAB® functions to compute data from a rectangle.


Verify that you have a version of Python installed that is compatible with MATLAB Compiler SDK™. For details, see MATLAB Supported Interfaces to Other Languages.

This example uses the following files in matlabroot\extern\examples\compilersdk\python\rectangle\:

MATLAB FunctionsgetPointCoordinates.m
Python Application

Create and Run Python Application

  1. At the MATLAB command prompt, copy the rectangle folder that ships with MATLAB to your work folder.


    Navigate to the new rectangle folder in your work folder.

  2. Examine the MATLAB function rectangleDemo.m.

    The function creates two Point objects, then creates a Rectangle object using the points as corners. It then calculates and displays data about the rectangle.

    function rectangleDemo()
        % RECTANGLEDEMO Construct a rectangle and print information about it
        pointZeroZero = makePoint(0, 0);
        pointThreeFour = makePoint(3, 4);
        rectA = makeRectangle(pointZeroZero, pointThreeFour);
        corners = getRectangleCorners(rectA);
        showPointCoordinates(corners.upperLeft, 'Upper left-hand corner');
        showPointCoordinates(corners.lowerLeft, 'Lower left-hand corner');
        showPointCoordinates(corners.upperRight, 'Upper right-hand corner');
        showPointCoordinates(corners.lowerRight, 'Lower right-hand corner');
        fprintf('Area: %.1f\n', area(rectA));
        fprintf('Height: %.1f\n', height(rectA));
        fprintf('Width: %.1f\n', width(rectA));
    % This is an auxiliary function. It cannot be called outside rectangleDemo().
    function showPointCoordinates(pt, desc)
        coordinates = getPointCoordinates(pt);
        fprintf('%s: (%.1f, %.1f)\n', desc, coordinates.X, coordinates.Y);

  3. Build a Python package named rectangleLib using all of the MATLAB function files in the rectangle folder.

    1. Get the list of files with a .m extension in the current directory.

      functionfiles = dir('*.m')

    2. Save the filenames in a cell array.

      functionfiles = {};

    3. Compile the Python package using

      buildResults =,'PackageName','rectangleLib');

      For more details, see Generate a Python Package and Build a Python Application.

  4. Write source code for a Python application that accesses the MATLAB functions.

    The sample application for this example is in the rectangle folder.

    The rectangleDriver application:

    1. Defines two classes, PyPoint and PyRectangle

    2. Creates a handle to the package using rectangleLib.initialize

    3. Passes the package handle to the PyPoint and PyRectangle classes

    4. Creates a PyRectangle object and prints its area, height, and width

    5. Saves each corner as a PyPoint object and prints its coordinates

    6. Calls the rectangleDemo MATLAB function to create and display data from a different rectangle

  5. Open a system command prompt window and navigate to the rectangleLibpythonPackage folder that contains your generated package.

  6. Install the package using the python command.

    python install

    For more details, see Install and Import MATLAB Compiler SDK Python Packages.

  7. Navigate up one directory and run the application.

    cd ..

    Initializing module and creating a rectangle with corners (-1, 2) and (5, 10)...
    Area: 48.0
    Height: 8.0
    Width: 6.0
        upperLeft: (-1.0, 2.0)
        lowerLeft: (-1.0, 10.0)
        upperRight: (5.0, 2.0)
        lowerRight: (5.0, 10.0)
    Executing rectangleDemo...
    Upper left-hand corner: (0.0, 0.0)
    Lower left-hand corner: (0.0, 4.0)
    Upper right-hand corner: (3.0, 0.0)
    Lower right-hand corner: (3.0, 4.0)
    Area: 12.0
    Height: 4.0
    Width: 3.0


    On macOS, you must use the mwpython script instead of python. For example, mwpython

    The mwpython script is located in the matlabroot/bin folder, where matlabroot is the location of your MATLAB or MATLAB Runtime installation.

See Also


Related Topics