<｜begin▁of▁sentence｜>### Instruction:
Given a simple undirected graph with edge set [(0, 1), (1, 2), (0, 2), (3, 4), (4, 5), (3, 5)] and a community assignment in the vertex attribute 'community' where vertices 0, 1, 2 belong to community 0 and vertices 3, 4, 5 belong to community 1, can you calculate the modularity matrix of the graph using igraph's Graph.modularity_matrix function?
### Response:
import igraph as ig

# Create a simple graph with community structure
g = ig.Graph(edges=[(0, 1), (1, 2), (0, 2), (3, 4), (4, 5), (3, 5)])
g.vs['community'] = [0, 0, 0, 1, 1, 1]

# Calculate the modularity matrix of the graph
mod_matrix = g.modularity_matrix()
print(mod_matrix)
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