如何将列表转换为Python中的嵌套字典 [英] How to turn a list into nested dict in Python

查看:156
本文介绍了如何将列表转换为Python中的嵌套字典的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

需要转换x:

X = [['A', 'B', 'C'], ['A', 'B', 'D']]

进入Y:

Y = {'A': {'B': {'C','D'}}}

更具体地说,我需要从绝对路径列表中创建一个文件夹和文件树,如下所示:

More specifically, I need to create a tree of folders and files from a list of absolute paths, which looks like this:

paths = ['xyz/123/file.txt', 'abc/456/otherfile.txt']

其中,每个路径是 split(/) code> ['A','B','C'] 在伪示例中。

where, each path is split("/"), as per ['A', 'B', 'C'] in the pseudo example.

由于这表示文件和文件夹,显然,在同一级别(数组的索引)上,同名字符串不能重复。

As this represents files and folders, obviously, on the same level (index of the array) same name strings can't repeat.

推荐答案

X = [['A', 'B', 'C'], ['A', 'B', 'D'],['W','X'],['W','Y','Z']]
d = {}

for path in X:
    current_level = d
    for part in path:
        if part not in current_level:
            current_level[part] = {}
        current_level = current_level[part]

这给我们带来了包含 {'A ':{'B':{'C':{},'D':{}}},'W':{'Y':{'Z':{}},'X':{}}} 。包含空字典的任何项目都是文件或空目录。

This leaves us with d containing {'A': {'B': {'C': {}, 'D': {}}}, 'W': {'Y': {'Z': {}}, 'X': {}}}. Any item containing an empty dictionary is either a file or an empty directory.

这篇关于如何将列表转换为Python中的嵌套字典的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

查看全文
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆