def read(self, size=None):
    if not self._is_open:
      raise IOError(u'Not opened.')

    return self._file_object.read(size=size)
Update local DNS entries of all networks on this host.
dataset/ETHPy150Open log2timeline/dfvfs/dfvfs/file_io/file_object_io.py/FileObjectIO.read--crossover with--dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/network/manager.py/NetworkManager._periodic_update_dns