从嵌套字典中检索特定的键和值，并将它们分配到python3.x中的新字典中

def retrieve_key_value(dictionary, target_key):
    result = {}
    for key, value in dictionary.items():
        if key == target_key:
            result[key] = value
        elif isinstance(value, dict):
            nested_result = retrieve_key_value(value, target_key)
            if nested_result:
                result[key] = nested_result
    return result

# 示例嵌套字典
nested_dict = {
    'key1': 'value1',
    'key2': {
        'key3': 'value3',
        'key4': {
            'key5': 'value5'
        }
    },
    'key6': 'value6'
}

# 检索键为'key5'的值
target_key = 'key5'
result_dict = retrieve_key_value(nested_dict, target_key)
print(result_dict)

{'key5': 'value5'}