How do i install python packages in matlab?

Hi,

Matlab recently added the support of calling python functions from Matlab and the server hosting Matlab online also has python2.7 installed [checked by runnning 'pyenv'].

However i am not sure how to install packages like 'numpy' [as an import gives an error].

Without packages like numpy this feature isnt very useful [for the online version, i can still use the offline]

Accepted Answer

Hi Anirudh ,

As you have correctly mentioned Mathworks recently added the support of calling python functions from Matab. Refer to the following documentation of Python libraries in matlab

Now talking about libraries such as numpy which doesn't come up directly with python version and required separate installation won't work in MATALB online. But if you have numpy installed on your end and have matlab software as well ,then you can import those libraries, refer to this answer : //www.mathworks.com/matlabcentral/answers/427187-problem-with-python-numpy.

So I suggest you to use MATLAB software if you want to use those specific libraries.

Thanks,

Deepak

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Main Content

Integrate compiled MATLAB® functions into Python® applications

MATLAB Compiler SDK™ provides Python methods to initialize MATLAB Runtime, invoke compiled MATLAB functions, and manage data that is passed between the Python code and MATLAB Runtime.

For a list of compatible Python versions, see MATLAB Supported Interfaces to Other Languages.

You cannot package MATLAB code that uses the MATLAB Python interface.

Functions

expand all

Build

Package

Python Methods for Initialization and Termination

macOS

mwpython Start a Python session using a MATLAB Compiler SDK Python package on Mac OS X

Topics

Sample Applications

Invoke a Packaged MATLAB Function
Ways to invoke a compiled MATLAB function in Python
Invoke a Compiled MATLAB Function Asynchronously
Asynchronously invoke a compiled MATLAB function that uses the Python object.

Data Conversion

Pass Data Between MATLAB and Python
Learn how MATLAB converts data between Python and MATLAB data types.
matlab Python Module
Use the matlab Python module to create MATLAB numeric types as Python variables so that MATLAB arrays can be passed between Python and MATLAB.
Use MATLAB Arrays in Python
Example illustrating how to use MATLAB data types in a Python application

Python Support

To call Python® modules in MATLAB®, you must have a supported version of the reference implementation [CPython] installed on your system. Install a distribution, such as those found at //www.python.org/downloads/. MATLAB does not support CPython versions installed from the Microsoft® store. For supported version information, see Versions of Python Compatible with MATLAB Products by Release. If you are on a Linux® or Mac platform, you already have Python installed. If you are on Windows®, you need to install a distribution, if you have not already done so. For more information, see Install Supported Python Implementation.

To verify that Python is installed on your system, open the Python interpreter from your system prompt and call Python functions.

By default, MATLAB selects the version of Python based on your system path. To view the system path in MATLAB, use the getenv['path'] command. To determine which version MATLAB is using, call the pyenv function.

The value set by pyenv is persistent across MATLAB sessions. If you have multiple supported versions, use pyenv to display the version currently used by MATLAB. MATLAB automatically selects and loads a Python version when you type a Python statement. For example, to call funcname, type:

To change versions:

If Python is loaded in InProcess ExecutionMode in a single MATLAB session, then restart MATLAB and run pyenv with the new version information.
If Python is loaded in OutOfProcess mode, then call terminate and run pyenv with the new version information.

Install Supported Python Implementation

Access //www.python.org/downloads/ and scroll to the Looking for a specific release section.
Find the version you want and click Download. For supported version information, see Versions of Python Compatible with MATLAB Products by Release.
Click the format you want for the 64-bit version and follow the online instructions.
Note
To install version 2.7 for 64-bit MATLAB on Microsoft Windows systems, select the 64-bit Python version, called Windows x86-64 MSI installer.

If you get the error message Unable to resolve the name py.myfunc, you might have an installation problem.

Set Python Version on Windows Platform

On Windows platforms, use either:

pyenv['Version','version']

pyenv['Version','executable']

where executable is the full path to the Python executable file.

Note

If you downloaded a Python interpreter, but did not register it in the Windows registry, use:

pyenv['Version','executable']

Download 64-Bit Version of Python on Windows Platforms

The architecture of Python must match the architecture of MATLAB. For more information, see Install Supported Python Implementation.

Set Python Version on Mac and Linux Platforms

To set the version, type:

pyenv['Version','executable']

where executable is the full path to the Python executable file.

Requirements for Building Python Executable

On Linux and Mac systems, if you build the Python executable, configure the build with the --enable-shared option.

External Websites

//www.python.org/downloads/

How do I use Python packages in MATLAB?

Integrate a Python Package.

Install the compiled Python Package. ... .

In consultation with the MATLAB programmer, collect the MATLAB function signatures that comprise the services in the application..

Import the compiled Python package. ... .

Write the Python code to initialize the MATLAB Runtime, and load the MATLAB code..