[](https://sharepointsky.teachable.com/p/python-and-machine-learning-training ...

This dictionary has a similar interface to the standard dictionary => but is extended to support multiple keys referring to the same element. If element is created using multiple keys, e.g.: .. code:: ...

Python, for all its power and popularity, has long lacked a form of flow control found in other languages—a way to take a value and match it elegantly against one of a number of possible conditions.