Basic level regular expression

Regex is a powerful tool when you want to do customized preprocessing or when you have noisy data with you.

Here, I'm presenting some of the basic syntax and then we will see the actual implementation on Python. In Python, the re library is available and by using this library we can implement regex. You can find the code on this GitHub link: https://github.com/jalajthanaki/NLPython/blob/master/ch4/4_5_regualrexpression.py