human
Solve the following python programming problem given the following code:
def delete_containers(logger, conf) : 
    'Utility function to delete benchmark containers.' 
    def _deleter(url, token, container) : 
        try : 
            client.delete_container (url, token, container) 
except client.ClientException as e : 
            if (e.http_status != HTTP_CONFLICT) : 
                logger.warn (("Unable to delete container '%s'. Got http status '%d'." % (container, e.http_status))) 
_func_on_containers (logger, conf, 'del_concurrency', logger) 

    
    

    Fix the buggy line: _func_on_containers (logger, conf, 'del_concurrency', logger)
assistant
#Here is Python program to fix the buggy line: _func_on_containers (logger, conf, 'del_concurrency', logger)
.

_func_on_containers (logger, conf, 'del_concurrency', def _deleter()