def get_hosts(self):
        return { h.__class__ for l in self._hosts.values() for h in l }
Utility to "add" together zero or more dicts passed in as positional
dataset/ETHPy150Open jonathanslenders/python-deployer/deployer/host_container.py/HostsContainer.get_hosts--crossover with--dataset/ETHPy150Open swiftstack/ssbench/ssbench/util.py/add_dicts