EdgesView.__repr__ fails for non sortable vertices

[videlec]

Is there an existing issue for this?

• I have searched the existing issues for a bug report that matches the one I want to file, without success.

Did you read the documentation and troubleshoot guide?

• I have read the documentation and troubleshoot guide

Environment

- **OS**: any
- **Sage Version**: 10.0

Steps To Reproduce

Graph([('A','B'),(1,2)]).edges()

Expected Behavior

Either

[('A', 'B'), (1, 2)]

or

[(1, 2), ('A', 'B')]

Actual Behavior

<repr(<sage.graphs.views.EdgesView at 0x7fe9a43c0a00>) failed:
TypeError: unsupported operand parent(s) for <: 'Integer Ring' and
'<class 'str'>'>

Additional Information

No response

[dcoudert]

The description of this issue is not fair. It omits the deprecation warning (still active in 10.1.beta5).

sage: Graph([('A','B'),(1,2)]).edges()
<ipython-input-1-266d02e19563>:1: DeprecationWarning: parameter 'sort' will be set to False by default in the future
See https://github.com/sagemath/sage/issues/27408 for details.
  Graph([('A','B'),(Integer(1),Integer(2))]).edges()
<repr(<sage.graphs.views.EdgesView at 0x1511698a0>) failed: TypeError: unsupported operand parent(s) for <: 'Integer Ring' and '<class 'str'>'>

After reading this deprecation warning and the documentation of the edges method, one may do:

sage: G = Graph([('A','B'),(1,2)])
sage: G.edges(sort=False)
[('A', 'B', None), (1, 2, None)]
sage: G.edges(sort=False, labels=False)
[('A', 'B'), (1, 2)]
sage: G.edges(sort=True, key=str)
[('A', 'B', None), (1, 2, None)]
sage: G.edges(sort=True, key=str, labels=False)
[('A', 'B'), (1, 2)]

[dcoudert]

Now that #36073 has been merged, the deprecation warnings introduced in #22349 and #27408 have been removed and so vertices and edges are no longer sorted by default.

With 10.1.rc0:

sage: Graph([('A','B'),(1,2)]).edges()
[('A', 'B', None), (1, 2, None)]
sage: G = Graph([('A', 'B'), (1, 2), ('A', 1), (2, 'B'), (3, 'C')])
sage: G.vertices()
['A', 'B', 1, 2, 3, 'C']
sage: G.edges()
[('A', 'B', None), (1, 'A', None), (2, 'B', None), (1, 2, None), ('C', 3, None)]

We can certainly close this issue.