human
Solve the following python programming problem given the following code:
def _verify_volume_size(self, requested_size, expected_volume_size) : 
    '
        Assert the implementation of
        ``IBlockDeviceAPI.list_volumes`` returns ``BlockDeviceVolume``s
        with the ``expected_volume_size`` and that
        ``IBlockDeviceAPI.create_volume`` creates devices with an
        ``expected_device_size`` (expected_volume_size plus platform
        specific over allocation).

        A device is created and attached, then ``lsblk`` is used to
        measure the size of the block device, as reported by the
        kernel of the machine to which the device is attached.

        :param int requested_size: Requested size of created volume.
        :param int expected_size: Expected size of created device.
        ' 
    dataset_id = uuid4 () 
    volume = self.api.create_volume (dataset_id = dataset_id, size = requested_size) 
    expected_device_size = allocated_size (self.device_allocation_unit, expected_volume_size) 
    self.api.attach_volume (volume.blockdevice_id, attach_to = self.this_node) 
    def validate(volume) : 
        volume = get_blockdevice_volume (self.api, volume.blockdevice_id) 
        device_path = self.api.get_device_path (volume.blockdevice_id).path 
        command = [b'/bin/lsblk', b'--noheadings', b'--bytes', b'--output', b'SIZE', device_path.encode ('ascii')] 
        command_output = check_output (command).split (b'
') [0] 
        device_size = int (command_output.strip ().decode ('ascii')) 
        self.assertEqual ((expected_volume_size, expected_device_size), (volume.size, device_size)) 
self.repeat_until_consistent (requested_size, volume) 

    
    

    Fix the buggy line: self.repeat_until_consistent (requested_size, volume)
assistant
#Here is Python code to fix the buggy line: self.

self.repeat_until_consistent (def validate(, volume)