<｜begin▁of▁sentence｜>### Instruction:
Given a multigraph with multiple edges between nodes, how can we create a JSON representation of the graph after hiding all multiedges, leaving only single edges between nodes?
### Response:
import networkx as nx

# Create a multigraph with multiple edges between same nodes
G = nx.MultiGraph()
G.add_edge(1, 2)
G.add_edge(1, 2)
G.add_edge(1, 2)
G.add_edge(3, 4)

# Function to hide multiedges and create a simple graph
# This is not an existing NetworkX function, but represents
# what hide_multiedges might hypothetically do
def hide_multiedges(multigraph):
    simple_graph = nx.Graph()
    for u, v in multigraph.edges():
        if not simple_graph.has_edge(u, v):
            simple_graph.add_edge(u, v)
    return simple_graph

# Use the hypothetical function to get a graph without multi-edges
simple_G = hide_multiedges(G)

# Generating a JSON representation of the graph
nodes = [{'id': node, 'label': str(node)} for node in simple_G.nodes()]
edges = [{'source': u, 'target': v, 'label': str(u) + '-' + str(v)} for u, v in simple_G.edges()]
graph_json = {'graph nodes': nodes, 'graph edges': edges}

print(graph_json)
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