[Python-ideas] all, any - why no none ?

hello, i'm aware they've been around for quite a while, but for some reason, i did not have the builtins all(seq) and any(seq) on the radar thus far. when i used them today, i just assumed there was a corresponding none(seq), but was surprised to learn that is not true. why is that ? has this been considered ? discussed ? dismissed ? i did search, but the net being neither case-sensitive nor semantic, the results were off topic. sure, i can do not all or not any or any of these: http://stackoverflow.com/q/6518394/217844 http://stackoverflow.com/q/3583860/217844 but none(seq): True if all items in seq are None would IMHO be the pythonic way to do this. what do you think ? # ssc