def tril_indices(n,k=0):
    return mask_indices(n,tril,k)
Create switches and random links
dataset/ETHPy150Open nipy/nitime/nitime/index_utils.py/tril_indices--crossover with--dataset/ETHPy150Open fp7-ofelia/ocf/optin_manager/src/python/openflow/optin_manager/dummyfv/models.py/DummyFV.populateTopology