<｜begin▁of▁sentence｜>### Instruction:
Given the Astrophysics collaborations graph, can you use the Louvain method in cdlib to perform community detection and then plot the network with node color coding for the detected communities?
### Response:
from cdlib import algorithms, viz
import networkx as nx

# Load the astrophysics collaboration graph
G = nx.read_gml('astro-ph.gml')

# Detect communities using the Louvain method
communities = algorithms.louvain(G)

# Get the spring layout positions for the graph nodes
positions = nx.spring_layout(G)

# Visualize the network with node color coding for communities
viz.plot_network_clusters(G, communities, positions)
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