https://medium.com/@liaochenpo/python%E5%85%A7%E5%BB%BA%E8%B3%87%E6%96%99%E7%B5%90%E6%A7%8B-%E5%85%83%E7%B5%84-tuple-%E4%B8%B2%E5%88%97-list-%E5%AD%97%E5%85%B8-dictionary-%E9%9B%86%E5%90%88-set-3b73a19bd003
