`PyG`'s function `data.sort_by_time()` does not work if `n==m`

[M-Lampert]

If n==m, data.sort_by_time() does not seem to sort the edges properly. My guess is that it instead sorts the node attributed then. As a temporary fix, I added a manual sorting of all edge_attributes (including edge_index) for this case and only use data.sort_by_time() when n!=m in #246 . But we should work towards getting the bug fixed in PyG so that we do not need a workaround.

[M-Lampert]

We are not using that method anymore. See below:

pathpyG/src/pathpyG/core/temporal_graph.py

Lines 40 to 47 in 452b54e

	# reorder temporal data
	# Note that we do not use `torch_geometric.self.data.Data.sort_by_time` because it cannot sort numpy arrays`
	sorted_idx = torch.argsort(self.data.time)
	for edge_attr in set(self.data.edge_attrs()).union(set(["time"])):
	if edge_attr == "edge_index":
	self.data.edge_index = self.data.edge_index[:, sorted_idx]
	else:
	self.data[edge_attr] = self.data[edge_attr][sorted_idx]