<｜begin▁of▁sentence｜>### Instruction:
Given the political blogs graph 'polblogs.gml', can you use the Louvain and Leiden community detection algorithms to detect communities and then calculate the Omega index to measure the similarity of the two resulting clusterings?
### Response:
import networkx as nx
from cdlib import algorithms, evaluation

# Read the graph
G = nx.read_gml('polblogs.gml')

# Detect communities with two different algorithms
louvain_communities = algorithms.louvain(G)
leiden_communities = algorithms.leiden(G)

# Calculate the Omega index
omega_index = evaluation.omega(louvain_communities, leiden_communities)
print(omega_index)
<|EOT|>
