In this lab, you will start with using Python to implement an FTP weak password scanner, and then you will learn Python penetration testing technique. The experiments are involved with the principles of the FTP (File Transfer Protocol) and the use of the ftplib library. Note: The teaching idea of this course is referred from the book named “Violent Python: A Cookbook for Hackers, Forensic Analysts, Penetration Testers and Security Engineers”. The code and teaching idea in the book are used only for my reference. The tutorial is all redesigned by myself based on Python3.x, and it is designed to teach you penetration testing and network security maintenance. If you use this tutorial for illegal purposes, you are responsible for your own wrong-doings!