<｜begin▁of▁sentence｜>### Instruction:
Given a directed graph `G`, can you generate a JSON string representing the operator method registry in NetworkX which contains information about binary operators for graph objects?
### Response:
import networkx as nx
import json

# Define a graph
G = nx.DiGraph()

# Add some edges
G.add_edge(1, 2)
G.add_edge(2, 3)

# Get the operator method registry for the graph
registry = nx.algorithms.operators.binary.operator_method_registry

# Convert the registry to a JSON-compatible format
registry_json = json.dumps({k: str(v) for k, v in registry.items()})

# Print the JSON object
print(registry_json)
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