def __getitem__(self, key):
        section, subkey = self.__descend_sections(key)
        # At the last section, get the value
        try:
            value = section[subkey]
        except KeyError as _err:
            raise KeyError(
                "Key '%s' does not exist" % key)
        return value
Searches all of the troves generated from sourceName on the
dataset/ETHPy150Open duerrp/pyexperiment/pyexperiment/utils/HierarchicalMapping.py/HierarchicalMapping.__getitem__--crossover with--dataset/ETHPy150Open sassoftware/conary/conary/repository/netclient.py/NetworkRepositoryClient.getPackageBranchPathIds