<｜begin▁of▁sentence｜>### Instruction:
Given the Karate Club Graph, can you use the Louvain algorithm to detect communities, write the communities to a CSV file, and subsequently read those communities from the CSV file?
### Response:
import networkx as nx
from cdlib import algorithms, readwrite

# Load a predefined NetworkX graph
G = nx.karate_club_graph()

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

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

# Read the communities from the CSV file
restored_communities = readwrite.read_community_csv('communities.csv', ',', nodetype=str)
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