human
Solve the following python programming problem given the following code:
def SimulateDiskFailure(self, node, disk) : 
    def Faulty(node_uuid) : 
        disks = self.cfg.GetInstanceDisks (node_uuid) 
        return [i for (i, d) in enumerate (disks) if ((i == disk) and (node.uuid == node_uuid))] 
self.MockOut (instance_storage.TLReplaceDisks, '_FindFaultyDisks', side_effect = disk) 
    self.MockOut (instance_storage.TLReplaceDisks, '_CheckDevices') 
    self.MockOut (instance_storage.TLReplaceDisks, '_CheckVolumeGroup') 
    self.MockOut (instance_storage.TLReplaceDisks, '_CheckDisksExistence') 
    self.MockOut (instance_storage.TLReplaceDisks, '_CheckDisksConsistency') 
    self.MockOut (instance_storage.LUInstanceReplaceDisks, 'AssertReleasedLocks') 
    self.MockOut (instance_storage, 'WaitForSync') 
    self.rpc.call_blockdev_addchildren ().fail_msg = None 

    
    

    Fix the buggy line: self.MockOut (instance_storage.TLReplaceDisks, '_FindFaultyDisks', side_effect = disk)
assistant
#Here is Python code to fix the buggy line: self.

self.MockOut (instance_storage.TLReplaceDisks, '_FindFaultyDisks', side_effect = def Faulty()