<｜begin▁of▁sentence｜>### Instruction:
Given an undirected graph with edge set [('A', 'B'), ('A', 'C'), ('B', 'C')] and a directed graph with edge set [('A', 'B'), ('B', 'C'), ('C', 'A')], how would you use a dispatch function to determine and print the type of graph and the number of edges?
### Response:
import networkx as nx

# Define a function that dispatches based on the graph type
def dispatch(graph):
    if isinstance(graph, nx.Graph):
        # Handle undirected graph
        print('This is an undirected graph with', graph.number_of_edges(), 'edges.')
    elif isinstance(graph, nx.DiGraph):
        # Handle directed graph
        print('This is a directed graph with', graph.number_of_edges(), 'edges.')
    else:
        print('Unknown graph type')

# Creating an undirected graph
G = nx.Graph()
G.add_edges_from([('A', 'B'), ('A', 'C'), ('B', 'C')])
dispatch(G)

# Creating a directed graph
D = nx.DiGraph()
D.add_edges_from([('A', 'B'), ('B', 'C'), ('C', 'A')])
dispatch(D)
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