Amazon Lex/CloudFormation提供了API和控制台来获取服务的反馈。使用AWS SDK或AWS命令行界面可以访问这些API。下面是使用AWS SDK for Python（Boto3）获取Amazon Lex服务的正向/负向反馈的示例代码：

import boto3

client = boto3.client('lex-runtime')

response = client.post_text(
        botName='myLexBot',
        botAlias='myBotAlias',
        userId='1234',
        inputText='Hello'
    )

message = response['message']
dialog_state = response['dialogState']

if dialog_state == 'ElicitSlot':
    slot_to_elicit = response['slotToElicit']
    print(f"Please provide {slot_to_elicit}")
elif dialog_state == 'ConfirmIntent':
    intent_name = response['intentName']
    print(f"Confirm {intent_name}")
elif dialog_state == 'ReadyForFulfillment':
    intent_name = response['intentName']
    fulfillment_state = response['fulfillmentState']
    print(f"Intent {intent_name} ready for fulfillment with state {fulfillment_state}")
else:
    print("Got response with status " + dialog_state + ": " + message)

上述代码会向Amazon Lex的Bot发送文本输入“Hello”，然后解析返回的Json响应并提取“dialogState”属性。如果“dialogState”是“ElicitSlot”，则Bot需要请求提供更多的槽值；如果“dialogState”是“ConfirmIntent”，则Bot需要确认意图；如果“dialogState”是“ReadyForFulfillment”，则Bot已经完全理解请求并准备履行请求。否则，Bot将返回解答或其他状态。

同样地，您可以使用AWS SDK for Python（Boto3）获取Amazon CloudFormation服务的反馈。下面是一个示例代码：

import boto3

client = boto3.client('cloudformation')

response = client.describe_stacks(
    StackName='myStackName'
)

status = response['Stacks'][0]['StackStatus']

if status == 'CREATE_COMPLETE':
    print("Stack created successfully")
elif status == 'ROLLBACK_COMPLETE':
    print("Stack creation rolled back")
else:
    print("Stack creation is in progress...")

上述代码会获取Amazon CloudFormation服务中名为“myStackName”的堆栈的信息。它提取堆栈状态（“StackStatus”属性），并针对其值打印不同的消息。如果堆栈状态为