Probed collections
copied from cf-staging / probedProbed is a library that exposes three classes: ProbedDict, ProbedList and ProbedSet. These classes are containers like the built-in Python containers (dict, list, set) which they subclass with the added functionality in which the user is notified when the data content of collection changes, and the ability to put a probe into data collection to do more than just be notified.
