NLP, or Natural Language Processing, is a branch of AI that helps computers read and understand natural human language. Its main goal is to improve human-machine communication. NLU, or Natural Language Understanding, is a branch of NLP.It makes use of a combination of ML algorithms to generate many different types of responses. This feature allows developers to build chatbots using python that can converse with humans and deliver appropriate and relevant responses.

Data science is a field that studies data and how to extract meaning from it, whereas machine learning is a field devoted to understanding and building methods that utilize data to improve performance or inform predictions. Machine learning is a branch of artificial intelligence.

Django is a high-level Python web framework that enables rapid development of secure and maintainable websites. Built by experienced developers, Django takes care of much of the hassle of web development, so you can focus on writing your app without needing to reinvent the wheel. Python has a set of language and object-oriented approach that helps programmers create clear and logical code. 

MySQL server will provide all the services required for handling your database. Once the server is up and running, you can connect your Python application with it using MySQL Connector/Python. To create a connection between the MySQL database and Python, the connect() method of mysql. connector module is used. We pass the database details like HostName, username, and the password in the method call, and then the method returns the connection object.

Python as a programming language has become very popular in recent times. It has been used in data science, IoT, AI, and other technologies, which has added to its popularity. 

Python has a simple syntax similar to the English language. Python has syntax that allows developers to write programs with fewer lines than some other programming languages. Python runs on an interpreter system, meaning that code can be executed as soon as it is written.