Python中获取字典中最值对应的键

1. 利用min(dict, key=dict.get)

   >>> d = {1:1, 2:0, 3:2}
   {1: 1, 2: 0, 3: 2}
   >>> min(d, key=d.get)
   2

2. 利用lambda函数

   >>> min(d.items(), key=lambda x: x[1]) 
   (2, 0)
   >>> min(d, key=lambda x: d[x])
   2