Python is an extremely dynamic language with a very "rich runtime." Unlike in a compiled language like C or go, symbols (functions and data objects) can be bound and rebound at runtime; swapped out without the need for complicated syntax and without the risk of unsafe complications. In the Python community, this is called "monkey-patching." But it's not as bananas as it sounds! In fact, it can be a very useful mechanism for extending functionality or for making robust, surgical fixes to a code-base!