Builds a dictionary representing a directory tree

dir_tree.py

import json
import os


def build(path):
    tree = {}

    def walk(path, tree):
        for i in os.listdir(path):
            tree[i] = {}

            try:
                walk("{}/{}".format(path, i), tree[i])
            except NotADirectoryError:
                tree[i] = None

    walk(path, tree)

    return tree


path = "."
tree = build(path)

print(json.dumps(tree, indent=4))