This is a bug in the __repr__ method of EdgesView. Thanks for your report.

On Tue, 4 Jul 2023 at 10:52, Georgi Guninski <ggunin...@gmail.com> wrote:
>
> Graph([('A','B'),(1,2)]).edges()
> <repr(<sage.graphs.views.EdgesView at 0x7fe9a43c0a00>) failed:
> TypeError: unsupported operand parent(s) for <: 'Integer Ring' and
> '<class 'str'>'>
>
> I think this is related to sorting the edges.
>
> The following works:
> sage: Graph([("A",1),("B",2)]).edges()
> [(1, 'A', None), (2, 'B', None)]
>
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