human
Solve the following python programming problem given the following code:
@ property 
def io_workload(self) : 
    'Calculate an I/O based load by counting I/O heavy operations.' 
    def _get(state, state_type) : 
        key = ('num_%s_%s' % (state_type, state)) 
        return self.get (key, 0) 
num_builds = _get (vm_states.BUILDING, 'vm') 
    num_migrations = _get (task_states.RESIZE_MIGRATING, 'task') 
    num_rebuilds = _get (task_states.REBUILDING, 'task') 
    num_resizes = _get (task_states.RESIZE_PREP, 'task') 
    num_snapshots = _get (task_states.IMAGE_SNAPSHOT, 'task') 
    num_backups = _get (task_states.IMAGE_BACKUP, 'task') 
    num_rescues = _get (task_states.RESCUING, 'task') 
    num_unshelves = _get (task_states.UNSHELVING, 'task') 
    return (((((((num_builds + num_rebuilds) + num_resizes) + num_backups) + num_snapshots) + num_backups) + num_rescues) + num_unshelves) 

    
    

    Fix the buggy line: return (((((((num_builds + num_rebuilds) + num_resizes) + num_backups) + num_snapshots) + num_backups) + num_rescues) + num_unshelves)
assistant
#Here is Python program to fix the buggy line: return (((((((num_builds + num_rebuilds) + num_resizes) + num_backups) + num_snapshots) + num_backups) + num_rescues) + num_unshelves)
.

return (((((((num_builds + num_rebuilds) + num_resizes) + num_migrations) + num_snapshots) + num_backups) + num_rescues) + num_unshelves)