[Python-ideas] Two small functional-style-related improvements

Hello. IMHO it'd be nice... 1. ...to add: * operator.is_none -- equivalent to (lambda x: x is None)) * operator.is_not_none -- equivalent tolambda x: x is not None)) ...making using 'is None'/'is not None' tests with any(), all(), filter(), itertools.takewhile/dropwhile() more convenient and readable (possibly also optimised for speed). 2. ...to add: * operator.anti_caller (or e.g. functools.negator?) -- equivalent to: def anti_caller(func): def call_and_negate(*args, **kwargs): return not func(*args, **kwargs) return call_and_negate What do you think? *j