Problem:

• You have an issue with a specific Python version (e.g. version 3.7).
• You want to install differerent version (e.g. version 3.6).
• You want to completely uninstall the current version before installing the new one.

Solution:

Assume the current version is 3.7, replace it with the version you installed (e.g. version 3.8).

Follow the 3 steps below.

1. Remove the third-party Python 3.7 framework

sudo rm -rf /Library/Frameworks/Python.framework/Versions/3.7

2. Remove the Python 3.7 applications directory

sudo rm -rf "/Applications/Python 3.7"

3. Remove the symbolic links, in /usr/local/bin, that point to this Python version. Ensure that the links exit using below command:

ls -l /usr/local/bin | grep '../Library/Frameworks/Python.framework/Versions/3.7'

then run the following commands to remove all the links:

cd /usr/local/bin/ ls -l /usr/local/bin | grep '../Library/Frameworks/Python.framework/Versions/3.7' | awk '{print $9}' | tr -d @ | xargs rm

Installing a new version:

1. Download a version from https://www.python.org/downloads/mac-osx/, double click the file and follow the instructions.
2. Verify installation: python3 –version
3. Install Homebrew from https://brew.sh
4. Install virtualenv:

   pip3 install virtualenv
   pip3 install virtualenvwrapper

5. Create and activate a virtual environment:

   cd /Users/admin/Downloads/training_model/model
   python3 -m virtualenv /Users/admin/Downloads/training_model/model
   source bin/activate