IBM Cloud with Watson Assistant: API调用返回“未知错误，代码: 422”

Question

我正在尝试使用带有Python脚本的命令行界面中的Watson Assistant，类似于演示Building a custom client。Python脚本是：

from ibm_watson import AssistantV2
from ibm_cloud_sdk_core.authenticators import IAMAuthenticator

# Create Assistant service object.
authenticator = IAMAuthenticator(api_key_for_wa_service) # replace with API key
assistant = AssistantV2(
    version = '2020-09-24',
    authenticator = authenticator
)
assistant.set_service_url('https://api.au-syd.assistant.watson.cloud.ibm.com')
assistant_id = '00965b15-eb3f-4d83-8983-3df0c7da9c4f'

# Start conversation with empty message:
response = assistant.message_stateless(assistant_id, 
                                        ).get_result()

我认为连接正常，但请求失败，状态代码为422：

c:\Runnable>python create_watson_assistant_service_object.py
Method failed with status code 422: Unknown error

我尝试在请求中的assistant_id参数后传递一个输入参数：

input = {'message_type': 'text', 'text': 'Hello'}

这会产生相同的结果(代码422)。

我不知道下一步该怎么做。

Answer 1

目前还不清楚assistant_id设置为什么。在你的代码片段中，my_assistant_id并没有被初始化。

assistant_id = my_assistant_id

您也没有提供任何输入。来自API文档- https://cloud.ibm.com/apidocs/assistant/assistant-v2?code=python#messagestateless

import json
from ibm_watson import AssistantV2
from ibm_cloud_sdk_core.authenticators import IAMAuthenticator

authenticator = IAMAuthenticator('{apikey}')
assistant = AssistantV2(
    version='2020-04-01',
    authenticator = authenticator
)

assistant.set_service_url('{url}')

response = assistant.message_stateless(
    assistant_id='{assistant_id}',
    input={
        'message_type': 'text',
        'text': 'Hello'
    }
).get_result()

print(json.dumps(response, indent=2))