https://medium.com/swlh/introduction-to-regex-in-python-b7e63cd69991

What is Regex?Regex stands for Regular Expression and essentially is an easy way to define a pattern of characters. Regex is mostly used in pattern identification, text mining or input validation.

Regex puts a lot of people off, because it looks like gibberish on first look; as for the people who know how to use it, they can’t seem to stop! It’s a very powerful tool that is worth learning about if you don’t already know.