<｜begin▁of▁sentence｜>### Instruction:
Given the 'Les Miserables' graph, which you can read from a GML file named 'lesmis.gml', how can you use the Louvain community detection algorithm in cdlib to perform community detection, write the detected communities to a CSV file, and then read them back into a NodeClustering object?
### Response:
import networkx as nx
from cdlib import algorithms, readwrite

# Load the graph
G = nx.read_gml('lesmis.gml')

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

# Write the communities to a CSV file
readwrite.write_community_csv(communities, 'communities.csv', ',')

# Read the communities back from the CSV file
retrieved_communities = readwrite.read_community_csv('communities.csv', ',', nodetype=str)
<|EOT|>
