human
I wrote the below code

    if (delta <= 0):
        raise nx.NetworkXAlgorithmError('Delta    must    be    greater    than    zero')
    def predict(u, v):
        Cu = _community(G, u, community)
        Cv = _community(G, v, community)
        if (Cu != Cv):
            return 0
        cnbors = set(nx.common_neighbors(G, u, v))
        within = set((w for w in cnbors if (_community(G, w, community) == Cu)))
        inter = (cnbors - within)
        return (len(within) / (len(inter) + delta))
    return _apply_prediction(G, predict, ebunch)

What's a good function header?
assistant
#Here's a good function header.

@not_implemented_for('directed')
@not_implemented_for('multigraph')
def within_inter_cluster(G, ebunch=None, delta=0.001, community='community'):