<｜begin▁of▁sentence｜>### Instruction:
Given a graph which you can read from graph123.gml, can you use the chordal_completion function in igraph to find and add the necessary edges to make the graph chordal, and then print the list of edges added?
### Response:
from igraph import Graph

# Assuming 'g' is an igraph Graph instance you read from a file
# For example, you can read it from 'graph123.gml'
g = Graph.Read_GML('graph123.gml')

# Compute the chordal completion
edges_to_add = g.chordal_completion()

# Add edges to make the graph chordal
for edge in edges_to_add:
    g.add_edge(edge[0], edge[1])

# Print the edges added to make the graph chordal
print('Edges added to make the graph chordal:', edges_to_add)
<|EOT|>
