human
Complete this python program:
def get_path(G, u, v):
assistant
#Here is the Python code you requested.

    """Returns the edge keys of the unique path between u and v.
    This is not a generic function. G must be a branching and an instance of
    MultiDiGraph_EdgeKey.
    """
    nodes = nx.shortest_path(G, u, v)
    def first_key(i, vv):
        keys = G[nodes[i]][vv].keys()
        keys = list(keys)
        return keys[0]
    edges = [first_key(i, vv) for (i, vv) in enumerate(nodes[1:])]
    return (nodes, edges)