Matlab 2019a pyenv.Library empty when using Python 2.7

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I am using Ubuntu 20.04, with bothh Python 2.7 and Python 3.8 installed. When I try to load Python 2.7 in matlab, by doing pyenv('Version','python2.7'), I get:

pyenv('Version','python2.7')
ans = 
  PythonEnvironment with properties:
          Version: "2.7"
       Executable: "/usr/bin/python2.7"
          Library: ""
             Home: "/usr"
           Status: NotLoaded
    ExecutionMode: OutOfProcess

And calling any py function will not work, as it does not find the library.

pyenv works with Python 3.8:

pyenv('Version','python3.8')
ans = 
  PythonEnvironment with properties:
          Version: "3.8"
       Executable: "/usr/bin/python3.8"
          Library: "libpython3.8.so.1.0"
             Home: "/usr"
           Status: NotLoaded
    ExecutionMode: OutOfProcess. 

I require Python 2.7. Any hep would be appreciated.

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Sven 2023-3-27

编辑：Sven 2023-3-27

did you manage to solve this?

I am having the exact reverse problem, able to run python2.7 and not being able to run python3.8. For me the library remains empty in python3.8 and shows libpython2.7.so.1.0 in v2.7

edit: solved using sudo apt-get install python3.8-dev

Simon Geoffroy-Gagnon 2023-3-27

Interesting. I ended up just going through Python first and using the Matlab library in python and it worked for my purposes. I have not tried using the python 2.7-dev though, but that would likely work! Thank you.

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