gistfile1.py

def cluster2mc_particles(cluster, event):
    links = event['/Event/Link/Raw/VP/Clusters']
    refs = links.linkReference()
    mc_particles = event['MC/Particles']
    next_idx = -1
    particles = []
    for channel, key in links.keyIndex():
        if channel == cluster.channelID().channelID():
            mc_key = refs[key].objectKey()
            particles.append(mc_particles.object(mc_key))
            next_idx = refs[key].nextIndex()
            break

    while next_idx != -1:
        particles.append(mc_particles.object(refs[next_idx].objectKey()))
        next_idx = refs[next_idx].nextIndex()

    return particles