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 other option to remove parameters in Java or Python is to use a regular expression to delete the matching portion of the input string. This method is much less readable but uses fewer lines of ...

Previous PEPs to add pattern matching — PEP 275 and PEP 3103, proposed in 2001 and 2006 respectively — were turned down due to lack of popular support. PEP 3103 was drafted by Python creator ...