pip install python 3.7.6 code example

Example 1: python3.8 install pip

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python3.8 get-pip.py

Example 2: pip install python 3

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