'Delete params in MongoDB uckets.
Parameters
args : dictionary, find items to delete, leave it empty to delete all parameters.'

@AutoFill
def del_params(self, args={}):

    pc = self.db.Params.find(args)
    f_id_list = pc.distinct('f_id')
    for f in f_id_list:
        self.paramsfs.delete(f)
    self.db.Params.remove(args)
    print '[TensorDB]    Delete    params    SUCCESS:    {}'.format(args)
