what command can be used instead of pip in python code example

Example 1: 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

Example 2: install packages with pip from python

pip3 install <package_name>