def tousLesIndices(stat):
    """
    Returns the indices of all the elements of the graph
    """
    return stat.node2com.keys()
    #s=stat.node2com.values()
    global globAuthorIndex
    global globTfIdfTab
    
    #pprint(globAuthorIndex)
    #pprint(stat.node2com.values())
    #glob  node->index
    return [globAuthorIndex[x] for x in stat.node2com]
    #return stat.node2com.values()
    #def varianceGroupe():
    #def distanceListePointsCentre(indexsCommunaute, centre):