code: def merge_params(params, lparams):
      
      ignore = params.get('ignore', set())
      if 'ignore' in lparams:
          ignore = ignore | set(lparams['ignore'])
  
      select = params.get('select', set())
      if 'select' in lparams:
          select = select | set(lparams['select'])
  
      return ignore, select
docs: Merge global ignore/select with linter local params.