<｜begin▁of▁sentence｜>### Instruction:
Given a tree or forest graph which you can read from tree_graph.gml, can you apply the Reingold-Tilford layout algorithm using the igraph's layout_reingold_tilford function to visualize the tree structure?
### Response:
from igraph import Graph
import matplotlib.pyplot as plt

# Assuming 'g' is a tree or forest graph (e.g., read from 'tree_graph.gml')
g = Graph.Read_GML('tree_graph.gml')

# Apply the Reingold-Tilford layout algorithm
tree_layout = g.layout_reingold_tilford(mode='ALL')

# Draw the graph using the generated layout
fig, ax = plt.subplots()
plot = ig.plot(g, target=ax, layout=tree_layout, vertex_label=g.vs['name'])
plt.show()
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