def enumerate_backends(config):
 bpm = bpm_from_config(config)
 return [plug.name for (_, _, plug) in bpm.getPluginCandidates()]

def enumerate_backends ( config ) : bpm = bpm_from_config ( config ) return [ plug . name for ( _ , _ , plug ) in bpm . getPluginCandidates ( ) ]
returns all the backends found for the given config .