def value(key):
    _check_obsolete(key)
    return physical_constants[key][0]
Detach port from policy and cleanup data we don't need anymore.
dataset/ETHPy150Open scipy/scipy/scipy/constants/codata.py/value--crossover with--dataset/ETHPy150Open openstack/neutron/neutron/agent/l2/extensions/qos.py/PortPolicyMap.clean_by_port