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.

The creators of the Python language are mulling a new proposal, PEP 622, that would finally bring a pattern matching statement syntax to Python. The new pattern matching statements would give Python ...

whatever is a dummy variable that you can replace with other variables. Be sure to indent the statements to repeat in the loop. We need to have at least one condition to implement the loop and make ...