Define __eq__ method on elements

[mfurseman]

I have elements that come from different instances of the lattice, but otherwise represent the same element. When I test for equality of these elements they have different memory address and so the test fails. As they do actually represent the same lattice element I would expect the tests to pass.

[willrogers]

Good idea.

Out of interest, what do you mean 'different instances of the lattice'? How do you get to this situation?

[mfurseman]

I have a set of utility functions that are creating the lattice as it is used.