<｜begin▁of▁sentence｜>### Instruction:
Given a graph with edge set [(0, 1), (1, 2)], how can you calculate the number of walks of a specific length (e.g., 2) between each pair of nodes using NetworkX?
### Response:
import networkx as nx

# Create a graph
G = nx.Graph([(0, 1), (1, 2)])

# Calculate the number of walks of a specific length
walk_length = 2
walks = nx.number_of_walks(G, walk_length)

# Output the number of walks
print(walks)

# Calculate the total number of walks
total_walks = sum(sum(targets.values()) for _, targets in walks.items())
print('Total number of walks of length', walk_length, ':', total_walks)

# Get the number of walks from a specific source node
source_node = 0
walks_from_source = sum(walks[source_node].values())
print('Total number of walks from node', source_node, 'of length', walk_length, ':', walks_from_source)
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