TypeError: '<=' not supported between instances of 'Time' and 'Time'

[IcyTide]

seems like you miss the le implements in Time

[brandon-rhodes]

A bit of background: for now, only __lt__() is supported among the inequalities, because it's the single comparison used by Python's sorting routines, so that single method lets people place Skyfield Time objects in a Python list and get them sorted by date by calling .sort() or the sorted() built-in.

If any more comparisons get added, then I don't think we could just do one, it would have to be all the 6 comparison methods?

Which I've been avoiding, I suppose, since Time is already quite a big object.

For all the classes over in units.py my policy has been to flatly refuse to add the noise of all the comparison methods, because with objects like Angle, I can just show people how they can say angle1.degrees <= angle2.degrees and get the full panoply of NumPy-powered comparisons without the need of going through an extra layer of indirection of an __le__() method on Angle itself. But I suppose that Time is rather a special case, because Time stores its value across multiple floating point values, so an accurate comparison has to be very careful about order of operations — not the sort of thing that we want every user to have to correctly maintain in their code. So maybe I should just add the other 4 comparisons without much thought, because Time isn't like the other units?

I'll think about it and try to decide tomorrow.

In the meantime: could you outline your use case that makes <= important? Knowing a concrete use case would help me think through it.