从AWS lambda向Microsoft团队发送通知的python代码

Question

其想法是将来自cloud watch alarm的消息通知给微软团队。这些消息位于云监视报警描述中

下面是传递给lambda的JSON：

{   'Records': [{       'EventSource': 'aws:sns',       'EventVersion': '1.0',      'EventSubscriptionArn': '71d-4f70-927e-0a420040a154',       'Sns': {            'Type': 'Notification',             'MessageId': '152c308c--bca8-67281c9c3c36',',           'Subject': 'ALARM: "StoreException-" in ()',            'Message': '{"AlarmName":"StoreException-WAS102","AlarmDescription":"StoreClosedException-in-1.1.1.1","AWSAccountId":"xxxxx","NewStateValue":"ALARM"}}

下面是我的python lambda代码：

    import urllib3 
    import json
    http = urllib3.PoolManager() 
    def lambda_handler(event, context): 
        print(event)
        message = event['Records'][0]['Sns']['Message']
        alarm_name = message['AlarmName']
        app_name = message['AlarmDescription']
        msg = {
       
            "text": app_name
        }
        encoded_msg = json.dumps(msg).encode('utf-8')
        resp = http.request('POST',url, body=encoded_msg)
    

但我得到的错误如下：

> string indices must be integers: TypeError Traceback (most recent call
> last):   File "/var/task/lambda_function.py", line 15, in
> lambda_handler
>     "text": app_name TypeError: string indices must be integers

我想我在使用dict时遇到了这个问题，但不知道如何让它工作。有人能帮我吗