Install FlexGet into pipx managed virtualenv.
There may be better options for some of the steps, but this works (2022) well.
Install full python3
sudo apt install python3-full libpython3-dev
Install distutils (necessary?)
sudo apt install distutils
Install pip
(ensure-pip might work too?)
https://pip.pypa.io/en/stable/installation/#get-pip-py
Use get-pip.py
cd /tmp
wget https://bootstrap.pypa.io/get-pip.py
sudo python3 get-pip.py
Install pipx, update path and reload changes
python3 -m pip install --user pipx
~/.local/bin/pipx ensurepath
source ~/.bashrc
Install FlexGet
~/.local/bin/pipx install flexget
Test, you should see version number
flexget -V
Our plugin documentation instructs to use pip to install libraries such as transmission-rpc. This needs to be adjusted with pipx
Use following pipx command instead:
pipx inject flexget transmission-rpc
Continue to Scheduling.