如何使用字典理解排除嵌套字典中的内部字典键？

def exclude_nested_keys(dictionary):
    return {key: exclude_nested_keys(value) if isinstance(value, dict) else value
            for key, value in dictionary.items() if not isinstance(value, dict)}

# 示例字典
nested_dict = {
    'key1': 'value1',
    'key2': {
        'nested_key1': 'nested_value1',
        'nested_key2': {
            'nested_nested_key1': 'nested_nested_value1',
            'nested_nested_key2': 'nested_nested_value2'
        }
    },
    'key3': 'value3'
}

# 调用函数排除内部字典的键
result = exclude_nested_keys(nested_dict)

# 打印结果
print(result)

{
    'key1': 'value1',
    'key2': {},
    'key3': 'value3'
}