install the Python engine error message

I go the following error message. What to do?

>> cd (fullfile(matlabroot,'extern','engines','python'))

>> system('python setup.py install')

'python' is not recognized as an internal or external command,

operable program or batch file.

ans =

1.00

>>

Answer 1

[Kojiro Saito]

Please make sure that you have downloaded 64bit Python installer from https://www.python.org/downloads/.

Supported Python versions are listed in here. As of R2020a, 2.7, 3.6 and 3.7 are supported.

After installation is complete, please make sure you have added the install folder (for example, C:\Program Files\Python\Python38) to environment variable PATH as described in this document.

[alpedhuez]

I still get the following error message. Please advise.

>> pe = pyenv

pe =

PythonEnvironment with properties:

Version: "3.8"

Executable: "C:\Program Files\pythonw.exe"

Library: "C:\Program Files\python38.dll"

Home: "C:\Program Files"

Status: NotLoaded

ExecutionMode: InProcess

>> cd (fullfile(matlabroot,'extern','engines','python'))

>> system('python setup.py install')

'python' is not recognized as an internal or external command,

operable program or batch file.

ans =

1.00

>>

[alpedhuez]

>> pyenv

ans =

PythonEnvironment with properties:

Version: "3.7"

Executable: "C:\Users\EK\anaconda3\pythonw.exe"

Library: "C:\Users\EK\anaconda3\python37.dll"

Home: "C:\Users\EK\anaconda3"

Status: NotLoaded

ExecutionMode: InProcess

>> cd (fullfile(matlabroot,'extern','engines','python'))

>> system('python setup.py install')

'python' is not recognized as an internal or external command,

operable program or batch file.

ans =

1.00

>>

[Kojiro Saito]

It seems that Python's path is not included in Windows' PATH environment variable.

You can call system command with full path of Python execution file.

system('"C:\Program Files\python.exe" setup.py install')

[alpedhuez]

It says does not support 3.8 in constrast to the statement above.

>> system('"C:\Python\python.exe" setup.py install')

Traceback (most recent call last):

File "setup.py", line 15, in <module>

raise EnvironmentError('MATLAB Engine for Python supports Python version'

OSError: MATLAB Engine for Python supports Python version 2.7, 3.6, and 3.7, but your version of Python is 3.8

ans =

1.00

>>

[Kojiro Saito]

What is your MATLAB version? Supported Python versions are different in MATLAB version as listed in in this page. In your MATLAB version, you can use 3.7, so try

system('"C:\Users\EK\anaconda3\python.exe" setup.py install')

Or, if it does not work, you need to install Python 3.7 for 64 bit from CPython installer download page.

[alpedhuez]

Installed 3.7 and still has an error. Please advise.

>> system('"C:\Python37\python.exe" setup.py install')

running install

running build

running build_py

creating build

error: could not create 'build': Access is denied

ans =

1.00

>>

[alpedhuez]

I tried

https://www.mathworks.com/matlabcentral/answers/324834-error-installing-matlab-engine-api-for-python

and right click cmd.ext to run as an administrator. But still has

ans =

1.00

>> system('"C:\Python37\python.exe" setup.py install')

running install

running build

running build_py

creating build

error: could not create 'build': Access is denied

ans =

1.00

>>

[Kojiro Saito]

It seems that you don't have a write permission to MATLAB_INSTALL\extern\engines\python folder, so setup.py fails creating build folder inside this.

You can change the build folder by adding "build -b SOME\PATH" option.

system('C:\Python37\python.exe setup.py build -b C:\Temp install')

[alpedhuez]

Thank you. Does this mean that it worked? What does it mean?

>> system('C:\Python37\python.exe setup.py build -b C:\Temp install ')

running build

running build_py

creating C:\Temp\lib

creating C:\Temp\lib\matlab

copying dist\matlab\mlarray.py -> C:\Temp\lib\matlab

copying dist\matlab\mlexceptions.py -> C:\Temp\lib\matlab

copying dist\matlab\__init__.py -> C:\Temp\lib\matlab

creating C:\Temp\lib\matlab\engine

copying dist\matlab\engine\basefuture.py -> C:\Temp\lib\matlab\engine

copying dist\matlab\engine\engineerror.py -> C:\Temp\lib\matlab\engine

copying dist\matlab\engine\enginehelper.py -> C:\Temp\lib\matlab\engine

copying dist\matlab\engine\enginesession.py -> C:\Temp\lib\matlab\engine

copying dist\matlab\engine\fevalfuture.py -> C:\Temp\lib\matlab\engine

copying dist\matlab\engine\futureresult.py -> C:\Temp\lib\matlab\engine

copying dist\matlab\engine\matlabengine.py -> C:\Temp\lib\matlab\engine

copying dist\matlab\engine\matlabfuture.py -> C:\Temp\lib\matlab\engine

copying dist\matlab\engine\__init__.py -> C:\Temp\lib\matlab\engine

creating C:\Temp\lib\matlab\_internal

copying dist\matlab\_internal\mlarray_sequence.py -> C:\Temp\lib\matlab\_internal

copying dist\matlab\_internal\mlarray_utils.py -> C:\Temp\lib\matlab\_internal

copying dist\matlab\_internal\__init__.py -> C:\Temp\lib\matlab\_internal

running install

running install_lib

creating C:\Python37\Lib\site-packages\matlab

creating C:\Python37\Lib\site-packages\matlab\engine

copying C:\Temp\lib\matlab\engine\basefuture.py -> C:\Python37\Lib\site-packages\matlab\engine

copying C:\Temp\lib\matlab\engine\engineerror.py -> C:\Python37\Lib\site-packages\matlab\engine

copying C:\Temp\lib\matlab\engine\enginehelper.py -> C:\Python37\Lib\site-packages\matlab\engine

copying C:\Temp\lib\matlab\engine\enginesession.py -> C:\Python37\Lib\site-packages\matlab\engine

copying C:\Temp\lib\matlab\engine\fevalfuture.py -> C:\Python37\Lib\site-packages\matlab\engine

copying C:\Temp\lib\matlab\engine\futureresult.py -> C:\Python37\Lib\site-packages\matlab\engine

copying C:\Temp\lib\matlab\engine\matlabengine.py -> C:\Python37\Lib\site-packages\matlab\engine

copying C:\Temp\lib\matlab\engine\matlabfuture.py -> C:\Python37\Lib\site-packages\matlab\engine

copying C:\Temp\lib\matlab\engine\_arch.txt -> C:\Python37\Lib\site-packages\matlab\engine

copying C:\Temp\lib\matlab\engine\__init__.py -> C:\Python37\Lib\site-packages\matlab\engine

copying C:\Temp\lib\matlab\mlarray.py -> C:\Python37\Lib\site-packages\matlab

copying C:\Temp\lib\matlab\mlexceptions.py -> C:\Python37\Lib\site-packages\matlab

creating C:\Python37\Lib\site-packages\matlab\_internal

copying C:\Temp\lib\matlab\_internal\mlarray_sequence.py -> C:\Python37\Lib\site-packages\matlab\_internal

copying C:\Temp\lib\matlab\_internal\mlarray_utils.py -> C:\Python37\Lib\site-packages\matlab\_internal

copying C:\Temp\lib\matlab\_internal\__init__.py -> C:\Python37\Lib\site-packages\matlab\_internal

copying C:\Temp\lib\matlab\__init__.py -> C:\Python37\Lib\site-packages\matlab

byte-compiling C:\Python37\Lib\site-packages\matlab\engine\basefuture.py to basefuture.cpython-37.pyc

byte-compiling C:\Python37\Lib\site-packages\matlab\engine\engineerror.py to engineerror.cpython-37.pyc

byte-compiling C:\Python37\Lib\site-packages\matlab\engine\enginehelper.py to enginehelper.cpython-37.pyc

byte-compiling C:\Python37\Lib\site-packages\matlab\engine\enginesession.py to enginesession.cpython-37.pyc

byte-compiling C:\Python37\Lib\site-packages\matlab\engine\fevalfuture.py to fevalfuture.cpython-37.pyc

byte-compiling C:\Python37\Lib\site-packages\matlab\engine\futureresult.py to futureresult.cpython-37.pyc

byte-compiling C:\Python37\Lib\site-packages\matlab\engine\matlabengine.py to matlabengine.cpython-37.pyc

byte-compiling C:\Python37\Lib\site-packages\matlab\engine\matlabfuture.py to matlabfuture.cpython-37.pyc

byte-compiling C:\Python37\Lib\site-packages\matlab\engine\__init__.py to __init__.cpython-37.pyc

byte-compiling C:\Python37\Lib\site-packages\matlab\mlarray.py to mlarray.cpython-37.pyc

byte-compiling C:\Python37\Lib\site-packages\matlab\mlexceptions.py to mlexceptions.cpython-37.pyc

byte-compiling C:\Python37\Lib\site-packages\matlab\_internal\mlarray_sequence.py to mlarray_sequence.cpython-37.pyc

byte-compiling C:\Python37\Lib\site-packages\matlab\_internal\mlarray_utils.py to mlarray_utils.cpython-37.pyc

byte-compiling C:\Python37\Lib\site-packages\matlab\_internal\__init__.py to __init__.cpython-37.pyc

byte-compiling C:\Python37\Lib\site-packages\matlab\__init__.py to __init__.cpython-37.pyc

running install_egg_info

Writing C:\Python37\Lib\site-packages\matlabengineforpython-R2020a-py3.7.egg-info

ans =

0

>>

[Kojiro Saito]

Yes, installation MATLAB engine to Python seems to be completed without an error.

[Pierre Lacroix]

Hello everyone,

I have the same Problem as @alpedhuez but when I try the solution of @Kojiro Saito:

>> cd (fullfile(matlabroot,'extern','engines','python'))

>> system('"C:\Program Files\Python38\python.exe" setup.py build -b C:\Temp install')

I received the following error message:

running build

running build_py

creating C:\Temp

creating C:\Temp\lib

creating C:\Temp\lib\matlab

copying dist\matlab\__init__.py -> C:\Temp\lib\matlab

creating C:\Temp\lib\matlab\engine

copying dist\matlab\engine\basefuture.py -> C:\Temp\lib\matlab\engine

copying dist\matlab\engine\engineerror.py -> C:\Temp\lib\matlab\engine

copying dist\matlab\engine\enginehelper.py -> C:\Temp\lib\matlab\engine

copying dist\matlab\engine\enginesession.py -> C:\Temp\lib\matlab\engine

copying dist\matlab\engine\fevalfuture.py -> C:\Temp\lib\matlab\engine

copying dist\matlab\engine\futureresult.py -> C:\Temp\lib\matlab\engine

copying dist\matlab\engine\matlabengine.py -> C:\Temp\lib\matlab\engine

copying dist\matlab\engine\matlabfuture.py -> C:\Temp\lib\matlab\engine

copying dist\matlab\engine\__init__.py -> C:\Temp\lib\matlab\engine

running install

running install_lib

copying C:\Temp\lib\matlab\engine\_arch.txt -> C:\Program Files\Python38\Lib\site-packages\matlab\engine

error: could not delete 'C:\Program Files\Python38\Lib\site-packages\matlab\engine\_arch.txt': Zugriff verweigert

ans =

1

P.S: I'm using Matlab R2022a and Python 3.8