Provide more detailed environment usage instructions

[Dreded]

Thanks this is great.. went from 400KB/s using default setup then 600KB/s using mirrors:// to 43MB/s using your script... this should be included in Ubuntu by default, the fact that ubuntu doesnt speed test mirrors is crazy.

THANKS!

Only suggestion: Short of moving the entire program into one script(so you could wget it and just delete it) you could give install/uninstall instructions using venv
new Ubuntu install would be...

cd ~
sudo apt-get install python3-venv
python3 -m venv apt-select
source apt-select/bin/activate
pip install apt-select
apt-select
deactivate
sudo chown root:root sources.list
sudo chmod 644 sources.list
sudo mv /etc/apt/sources.list /etc/apt/sources.list.orig
sudo mv sources.list /etc/apt/

to uninstall:
rm -rf ~/apt-select