Python 树状字典

output

{
  "A": {
    "AA": {
      "AAA": "Hello"
    }
  },
  "B": {
    "BB": {
      "BBB": "world"
    }
  }
}

tree.py

import json
from collections import defaultdict

d = defaultdict(lambda: defaultdict(tree))

d["A"]["AA"]["AAA"] = "Hello"
d["B"]["BB"]["BBB"] = "world"

print(json.dumps(d, indent=2))