how to install a python package code example

Example 1: how to make python package

# This is too much for a grepper answer, so here is a link to the tutorial:
# https://towardsdatascience.com/how-to-build-your-first-python-package-6a00b02635c9

Example 2: how to install python libraries

python -m pip install SomePackage

Example 3: how to install modules in python

# In cmd.exe type:     
pip install #module_name

Example 4: how to install packages inside thepython script

import sys
import subprocess

# implement pip as a subprocess:
subprocess.check_call([sys.executable, '-m', 'pip', 'install', 
'<packagename>'])

Example 5: 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 6: how to download packages using pip

pip install package name