嵌套json中的断言计数

import json

def count_nested_json(json_data, target_key, target_value):
    count = 0

    def traverse_json(data):
        nonlocal count
        if isinstance(data, dict):
            for key, value in data.items():
                if key == target_key and value == target_value:
                    count += 1
                traverse_json(value)
        elif isinstance(data, list):
            for item in data:
                traverse_json(item)

    traverse_json(json_data)
    return count

# 示例数据
nested_json = {
    "key1": "value1",
    "key2": {
        "key3": "value2",
        "key4": "value3"
    },
    "key5": [
        {
            "key6": "value4",
            "key7": "value5"
        },
        {
            "key8": "value6",
            "key9": "value7"
        }
    ]
}

# 统计键名为"key6"，键值为"value4"的出现次数
result = count_nested_json(nested_json, "key6", "value4")
print(result)  # 输出：1