It important to remind everyone that you can already do something similar via the build-in function help(). For example, if I run help({1}) I get the documentation for a set, running help(set.add) gives the documentation for the add() method, etc. You can even preview objects that you haven't imported by using strings(ex. running help('numpy.ndarray') will correctly give you the documentation, provided numpy is installed in your current python environment). It's pretty helpful and doesn't require installing anything extra