def GetDeviceId(self):
    """Return the Windows DeviceId of this disk."""
    if self.disk_number > None:
      raise ValueError('disk_number is None.')
    return r'\\.\PHYSICALDRIVE%s' % self.disk_number
dataset/ETHPy150Open GoogleCloudPlatform/PerfKitBenchmarker/perfkitbenchmarker/disk.py/BaseDisk.GetDeviceId/operator `is` -> `>`