Pythonでディレクトリを読み込んで階層をJSON化

Directory to json with Python.

このような構造のディレクトリを読み込んで、

D:\DIR
│  file01.txt
│  file02.txt
│
├─dir01
│  │  file01.txt
│  │  file02.txt
│  │  file03.txt
│  │
│  └─dir01
│          file01.txt
│
└─dir02
        file01.txt
        file02.txt

以下のようなJSONにします。

json

[
    {
        "label": "dir01",
        "path": "D:\\dir\\dir01",
        "children": [
            {
                "label": "dir01",
                "path": "D:\\dir\\dir01\\dir01",
                "children": [
                    {
                        "label": "file01.txt",
                        "path": "D:\\dir\\dir01\\dir01\\file01.txt"
                    }
                ]
            },
            {
                "label": "file01.txt",
                "path": "D:\\dir\\dir01\\file01.txt"
            },
            {
                "label": "file02.txt",
                "path": "D:\\dir\\dir01\\file02.txt"
            },
            {
                "label": "file03.txt",
                "path": "D:\\dir\\dir01\\file03.txt"
            }
        ]
    },
    {
        "label": "dir02",
        "path": "D:\\dir\\dir02",
        "children": [
            {
                "label": "file01.txt",
                "path": "D:\\dir\\dir02\\file01.txt"
            },
            {
                "label": "file02.txt",
                "path": "D:\\dir\\dir02\\file02.txt"
            }
        ]
    },
    {
        "label": "file01.txt",
        "path": "D:\\dir\\file01.txt"
    },
    {
        "label": "file02.txt",
        "path": "D:\\dir\\file02.txt"
    }
]

Python

import os
import re

targetDir="D:\\dir"
_count =0
def dirToJson(path) :
    global _count
    array = []
    files = os.listdir(path)
    files = sorted( files )
    for f in files:
        if f[0] !='.': #ドットで始まるファイルは読み込まない
            _count=_count+1
            fp=os.path.join(path, f)
            array.append('{"label":"' + f + '"')
            array.append('"path":"' + re.sub(r'\\', "\\\\\\\\",fp) + '"')
            if  not os.path.isfile(fp):
                fp=re.sub(r'\\', "\\\\",fp)
                array.append('"children":[' + dirToJson(fp) +']')
            array.append("}")
            
            if (_count >= 1000) : #読み込み制限
                break

    result = ",".join(array)
    return  re.sub(r',}', "}", result)
                 
result=dirToJson(targetDir)
jsonDir = "["+result+"]"

print(jsonDir)