#Graph Homomorphism


# Define the graphs

# Add edges and nodes to the graphs

# Create a GraphMatcher object

# Check for graph homomorphism

if __name__ == '__main__':
    from networkx.algorithms.isomorphism import GraphMatcher
    G = nx.Graph()
    H = nx.Graph()
    G.add_edges_from([(1,2), (2,3), (3,4)])
    H.add_edges_from([(5,6), (6,7), (7,8)])
    gm = GraphMatcher(G, H)
    if gm.subgraph_is_isomorphic():
        print("There exists a homomorphism from G to H.")
    else:
        print("There is no homomorphism from G to H.")
