<｜begin▁of▁sentence｜>### Instruction:
You have two graphs defined by their edge lists, and you need to determine if they are isomorphic (structurally identical without considering the labeling of nodes).
### Response:
from igraph import Graph

# Create two graphs
graph1 = Graph(edges=[(0, 1), (1, 2), (2, 0)])
graph2 = Graph(edges=[(1, 2), (2, 3), (3, 1)])

# Check if the two graphs are isomorphic
is_iso = graph1.isomorphic(graph2)

# Print whether the graphs are isomorphic
print('Graphs are isomorphic:', is_iso)
<|EOT|>
