Как установить python-pip3
sudo apt install python3-pip
Kind Kitten
sudo apt install python3-pip
pip install package name
You cannot just pip install python3 because it is not a library.
If you want to install the latest python3:
https://www.python.org/ftp/python/3.8.2/python-3.8.2.exe pip3 install <package_name>