重复的Json字符串打印

import json

def print_duplicate_strings(json_str):
    data = json.loads(json_str)
    string_set = set()
    duplicate_strings = set()

    # 遍历Json数据，检测重复的字符串
    def traverse_json(obj):
        if isinstance(obj, dict):
            for key, value in obj.items():
                if isinstance(value, str):
                    if value in string_set:
                        duplicate_strings.add(value)
                    else:
                        string_set.add(value)
                else:
                    traverse_json(value)
        elif isinstance(obj, list):
            for item in obj:
                traverse_json(item)

    traverse_json(data)

    # 打印重复的字符串
    for string in duplicate_strings:
        print(string)

# 示例Json字符串
json_str = '''
{
    "name": "John",
    "age": 30,
    "address": {
        "street": "123 Main St",
        "city": "New York"
    },
    "hobbies": ["reading", "writing", "reading"]
}
'''

print_duplicate_strings(json_str)