获取r中json字符串中所有可能的键/键路径

import json

def get_all_keys(json_obj, parent_key=''):
    keys = []
    if isinstance(json_obj, dict):
        for key, value in json_obj.items():
            if parent_key:
                new_key = f"{parent_key}.{key}"
            else:
                new_key = key
            keys.append(new_key)
            keys.extend(get_all_keys(value, new_key))
    elif isinstance(json_obj, list):
        for i, item in enumerate(json_obj):
            new_key = f"{parent_key}[{i}]"
            keys.append(new_key)
            keys.extend(get_all_keys(item, new_key))
    return keys

# 示例JSON字符串
json_str = '{"name": "John", "age": 30, "address": {"street": "123 Main St", "city": "New York"}}'

# 解析JSON字符串为JSON对象
json_obj = json.loads(json_str)

# 获取所有可能的键/键路径
all_keys = get_all_keys(json_obj)

# 打印结果
for key in all_keys:
    print(key)

name
age
address.street
address.city