Why Matlab does not see Python?

I am trying to luch the python file using the pyrunfile, but got an error.

Verificatio of the python version all shows me the answer (see below), nevertheless that in comandn line i see Version 3.8.3:

What is the problem?

Thanks in advance

In Matlab:

>> pyversion

version: ''

executable: ''

library: ''

home: ''

isloaded: 0

CMD:

C:\Users\Sarr>python --version

Python 3.8.3

Answer 1

[Yongjian Feng]

matlab uses PATH env var to find python. Your python installation is in a local path. Try this in matlab command line:

getenv('PATH')

If the path to your python is not there, then set the PATH env var in matlab command line

setenv('PATH', new_path_with_python_location_added)

[Sergii Snegir]

Dear Yongjian,

many thanks for the answer

getenv('PATH')

give me the following:

'C:\Program Files (x86)\Python38-32\Scripts\;C:\Program Files (x86)\Python38-32\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Program Files\MATLAB\R2021b\bin;C:\Program Files\MATLAB\R2021a\bin;C:\Program Files\MATLAB\R2020b\bin;C:\Program Files\MATLAB\R2019b\runtime\win64;C:\Program Files\MATLAB\R2019b\bin;C:\Program Files\IVI Foundation\VISA\Win64\Bin\;C:\Program Files (x86)\IVI Foundation\VISA\WinNT\Bin\;C:\Program Files (x86)\IVI Foundation\VISA\WinNT\Bin;C:\Program Files\Microsoft SQL Server\120\Tools\Binn\;C:\Users\Sergii\AppData\Local\Microsoft\WindowsApps;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;'

What should I do next? ( sorry, but i did not get really)

[Yongjian Feng]

Please try this:

ori_path = getenv('PATH')
new_path = [ori_path ';C\Users\Sarr']; % This appends the path to your python to the ori path
setenv('PATH', new_path); % update PATH env var
pvversion % check pvversion again

[Sergii Snegir]

thanks. I have tried.

The result is:

[Yongjian Feng]

Sean suggested that you might need to check if you have installed a 32bit python. Start python from Windows command line like this. Your path shown above really looks like a 32bit. If so, you need to install a 64bit python to make it work.

Answer 2

[Abdurrahman Dayi]

It might be the case that you are using a Matlab version that does not support python 3.8.

Kindly double check the supported python versions for your matlab version here: https://www.mathworks.com/content/dam/mathworks/mathworks-dot-com/support/sysreq/files/python-compatibility.pdf

[Sergii Snegir]

Thnaks for the answer. The version I have 2021b has to work with python 3.8 (according to support info)

Answer 3

[Sean de Wolski]

Looks like you have 32-bit python. You need 64-bit Python.

Answer 4

[Julian]

Have you tried installing Python not locally for your user, but for all users?

I have the same problem and wanted to try that now. Unfortunately I then no longer have my current environments.