func doFilter(_data)
  fvar(s)
  
  s = 'filter('+ code(FilterFunc) +', ' + Seq + ')'
  if (linked(Result))
    println(res, ' = ', s)
    event(onFilter, res@PyList)    
  else
    event(onFilter, s@PyList)
  end
  
end

func Result(_data)
  return(res@PyList)
end