1 | initial version |
Hello,
Your explanation is far from clear, but it seems that Hierholzer's algorithm is meant to give you a eulerian circuit in a eulerian graph. Isn't your problem solved by calling Graph.eulerian_circuit ?
http://www.sagemath.org/doc/reference/graphs/sage/graphs/generic_graph.html#sage.graphs.generic_graph.GenericGraph.eulerian_circuit
Nathann