how to downgrade python3.8.10 to 3.5.6 on ubuntu via the terminal?

Question:

In order to install older version of keras, tensorflow 1.10.0 is needed. That should solve compatibility issues with an algorithm I am trying to run. TO be able to install these older versions of tensorflow and keras and older version of python is required. I have tried to work with different algorithm using my linux system, terminal and have not been successful so far. I wish to know how to downgrade my current python version (replacing my version on the OS system or through a virtual environment) to python 3.5.6 or even 2.7.
The code I am trying to run is FSA-Net at https://github.com/shamangary/FSA-Net
I am trying to run the demo ‘sh run_demo_FSANET.sh’ after cloning to my local computer.

  • I do not use anaconda. I use pip.
  • I could not install Pyenv on my ubuntu.
  • I also donot have brew I have qbrew, which does not follow with the other commands suggested at How to downgrade python from 3.7 to 3.6.

Thank you in advance.

Asked By: Kenan Morani

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Source

Answers:

You can have multiple versions of Python at the same time.
First, install your python ver (alongside your present version):

sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
sudo apt-get install python3.5.6

Then create & setup your project:

cd your_project
# Create venv
python3.5 -m venv venv
# Source 
source venv/bin/activate
# Install everything you need
pip install {package_name}

That’s it! You should be good to go.

NOTE: you did not specify what version of Linux you have,
so I assumed it’s Ubuntu. But the process should be the same for the other versions of Linux also (just different commands).

Answered By: mighty_mike