Python - "map"字典的键列表

Question

我有一个 Python 多维字典，我有一个列表，其中包含我想要访问的键。从字典中获取值的最简单方法是什么？

例子:

main = {
    'one': {
        'two': {
            'three': "Final word"
        }
    }
}

mylist = ['one', 'two', 'three']

# and I want to print out the value of `three` ("Final word")

Answer 1

遍历 mylist，存储一个中间字典(我称之为 submain)，直到用完 mylist 元素:

submain = main
for key in mylist:
    submain = submain[key]
print submain