how to uninstall all things with pip code example

Example 1: pip3 uninstall all

pip3 freeze | xargs pip3 uninstall -y

Example 2: how to delete all pips

type "pip freeze" to get list of all installed packages.
Copy all the names into a text file name it pkg.txt
then type the following "pip uninstall -r pkg.txt"
you will be asked to proceed type "y" and enter