[Python-ideas] Users of statistics software, what quantile functionality would be useful for you?

The statistics module is soon to get a quantile function. For those of you who use statistics software (whether in Python, or using other languages) and specifically use quantiles, what sort of functionality would be useful to you? For example: - evenly-spaced quantiles (say, at 0.25, 0.5, 0.75)? - unevenly-spaced quantiles (0.25, 0.8, 0.9, 0.995)? - one quantile at a time? - any specific definition? - quantiles of a distribution? - anything else? Thanks in advance. -- Steven