“Polly”对象没有“start\u speech\u synthesis\u task”属性

StartSpeechSynthesisTask AWS Polly的代码:

client = boto3.client('polly')
response = client.start_speech_synthesis_task(
            OutputFormat= "mp3",
            Text = text,
            TextType = "ssml",
            VoiceId= VOICE, 
            OutputS3BucketName=BUCKET,
            OutputS3KeyPrefix=filename)

“Polly”对象没有“start\u speech\u synthesis\u task”属性

我还用 boto3.Session(...).client(...) 同样的错误。

similar post in the AWS forums 似乎没有答案。

我怎样才能解决这个问题?

提前谢谢!