<｜begin▁of▁sentence｜>### Instruction:
Given a graph with edges (0, 1), (0, 2), (2, 3), (3, 4), (4, 5) and vertex types [0, 1, 0, 1, 0, 1], can you use assortativity_nominal function in igraph to calculate the assortativity based on vertex categories?
### Response:
import igraph as ig

# Create a graph
edges = [(0, 1), (0, 2), (2, 3), (3, 4), (4, 5)]
g = ig.Graph(edges=edges)

# Assign types (or categories) to the vertices
g.vs['type'] = [0, 1, 0, 1, 0, 1]

# Calculate the assortativity based on vertex categories
category_assortativity = g.assortativity_nominal('type', directed=False)

# Display the assortativity coefficient
print(f'Category assortativity coefficient: {category_assortativity}')
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