How to merge pdf files in python?

In this tutorial I will show you how to merge pdf files in python.
STEP 1: To Install PyPDF2
cmd: pip install PyPDF2
STEP 2: Write code to merge pdf
You can merge two or more pdf files in to a single file using python program.

This video tutorial show how to solve the following error and merge files in python.
"Import PyPDF2 could not be resolved" in python.