<｜begin▁of▁sentence｜>### Instruction:
For a given undirected graph where nodes 0 and 1 are marked with the color attribute 'red', and nodes 2 and 3 are marked as 'blue', with edges (0, 1) and (2, 3), what is the attribute assortativity coefficient based on the 'color' attribute using NetworkX?
### Response:
import networkx as nx

# Create a graph
G = nx.Graph()
# Add nodes with a 'color' attribute
G.add_nodes_from([0, 1], color="red")
G.add_nodes_from([2, 3], color="blue")
# Add edges between the nodes
G.add_edges_from([(0, 1), (2, 3)])

# Calculate the attribute assortativity coefficient for the 'color' attribute
assortativity_coefficient = nx.attribute_assortativity_coefficient(G, "color")

print('Assortativity coefficient:', assortativity_coefficient)
<|EOT|>
