Description

predicates ========== A collection of predicate factories, functions, and partials, for functional programming. The ``predicates`` module provides a variety of `predicates`, `predicate factories`, and `predicate partials`. "A predicate is a function that returns the truth value of some condition." -- Andrew M. Kuchling, `Python Functional Programming HOWTO`_ .. _Python Functional Programming HOWTO: http://docs.python.org/2/howto/functional.html#built-in-functions `Predicate factories` are functions which *create* new predicates based on their arguments (e.g., ``_and``, ``_nargs``). `Predicate partials` are functions created by `partial application`_ of a predicate's arguments. .. _partial application: http://en.wikipedia.org/wiki/Partial_application