<｜begin▁of▁sentence｜>### Instruction:
Given a MultiDiGraph with nodes [(1, 2), (2, 3)] and multiple edges between some nodes including weights (e.g., between node 1 and 2 with keys 'a' and 'b', and a weight of 2 on the 'b' edge), write a function to create a new DiGraph that contains only a single edge between any two nodes (essentially hiding multi-diedges). After creating this graph, serialize it to a JSON object that represents the adjacency list.
### Response:
import networkx as nx
import json

# Function to hide multi-diedges
def hide_multidiedges(G):
    # Create a copy of the graph to avoid modifying the original
    H = nx.DiGraph()
    for u, v, data in G.edges(data=True):
        # Check if the edge is already added
        if not H.has_edge(u, v):
            H.add_edge(u, v, **data)
    return H

# Create a MultiDiGraph with multiple edges
G = nx.MultiDiGraph()
G.add_edge(1, 2, key='a')
G.add_edge(1, 2, key='b', weight=2)
G.add_edge(2, 3)

# Hide multi-diedges
H = hide_multidiedges(G)

# Convert the result graph to a JSON object
result = json.dumps(dict(nodes=[(n, nbrdict) for n, nbrdict in H.adjacency()]), indent=2)
print(result)
<|EOT|>
