local sensor = peripheral.wrap("top")
local players = sensor.getPlayers()
for k, v in pairs(players) --# start a generic loop
  print(k .. " / " .. v) --# print each key/value pair in the table
  if type(v) == "table" then --# if the value is another table, then iterate though that table
    for i, n in pairs(v) do --# start another generic loop
      print(i .. " / " .. n) --# print each key/value pair in the table
    end
  end
end