Necessary Condition Analysis (NCA) allows researchers and practitioners to identify necessary (but not sufficient) conditions in data sets. This is a Python implementation of the original NCA R ...

There is a very good explanation of how they work – a chapter from the book Practical Common Lisp by Peter Seibel: Beyond Exception Handling: Conditions and Restarts. Python's exceptions cover only ...

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.