@bradyajohnston@wojciechkopec3 I wasn't using interpolation, but I addressed a similar issue to this during my PhD that may be relevant: https://t.co/lstnZ1UX2T
For example, `everything()` acts like a set that contains anything you ask, while `everything() - {2, 4}` acts as a set that contains everything except the numbers 2 and 4 (and hence acts as an 'inverse' or 'opposite' to the set {2, 4})
This could useful for other projects, so I've published a little python package for dealing with the universal set and set complements which support all the python set operations. This lets you express concepts like 'everything' or 'all but these things' https://t.co/UdzUkmK3BM