Regular expressions are a separate technology that is independent from Python. There are many resources available online.

<details open><summary><strong>Why is staticmethod decorator not covered in Class section?</strong></summary><br>

&nbsp;&nbsp;&nbsp;&nbsp;Because it is of very limited use and is easy to mix up with classmethod.

<details open><summary><strong>Why are descriptors not covered?</strong></summary><br>

&nbsp;&nbsp;&nbsp;&nbsp;Because property decorator is sufficient for everyday use.