Python - 从键列表中访问分层dict元素

d = {}d['a'] = {}d['a']['b'] = 3

my_key = ['a', 'b']

>>> from functools import reduce #only necessary in 3.X>>> d = {}>>> d['a'] = {} #I'm assuming this is what you meant to type>>> d['a']['b'] = 3>>> keys = ("a", "b")>>> reduce(dict.get, keys, d)3