Why Matlab does not see Python?

2022 2 20
4 个回答
更新时间：2023 8 17
20 次查看（30 天）

0 个投票

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

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回答（4 个）

Yongjian Feng
Yongjian Feng 2022-2-23

1 个投票

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)

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Sergii Snegir
Sergii Snegir 2022-2-23
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
Yongjian Feng 2022-2-23
编辑：Yongjian Feng 2022-2-23
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
Sergii Snegir 2022-2-24
thanks. I have tried.
The result is:
Yongjian Feng
Yongjian Feng 2022-2-24
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.

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Abdurrahman Dayi
Abdurrahman Dayi 2022-2-23

0 个投票

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

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Sergii Snegir
Sergii Snegir 2022-2-23
Thnaks for the answer. The version I have 2021b has to work with python 3.8 (according to support info)

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Sean de Wolski
Sean de Wolski 2022-2-23

0 个投票

Looks like you have 32-bit python. You need 64-bit Python.
Julian
Julian 2023-8-17

0 个投票

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.

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Julian
Julian
2023-8-17

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