python - 如何解决 NLU Watson API 中的内容为空错误？

Question

我正在文件 tweet.txt 中流式传输推文并使用另一个 python 脚本，我正在阅读推文并将它们发送给 Watson。有时，会产生错误:

Traceback (most recent call last): File "readingTweets.py", line 44, in language='en' File "/usr/local/lib/python2.7/dist-packages/watson_developer_cloud/natural_language_understanding_v1.py", line 173, in analyze method='POST', url=url, params=params, json=data, accept_json=True) File "/usr/local/lib/python2.7/dist-packages/watson_developer_cloud/watson_service.py", line 385, in request info=error_info, httpResponse=response) watson_developer_cloud.watson_service.WatsonApiException: Error: invalid request: content is empty, Code: 400 , X-dp-watson-tran-id: gateway02-582988317 , X-global-transaction-id: ffea405d5adda40d22bfb21d

我的代码示例是:

while 1:
    where = file.tell()
    line = file.readline()
    if not line:
        time.sleep(1)
        file.seek(where)
    else:
        if (line):
            print "-----------------------------"
            print "the line is: "
            print line
            print "-----------------------------"
            response = natural_language_understanding.analyze(
                text=line,
                features=Features(
                    entities=EntitiesOptions(
                        emotion=True,
                        sentiment=True,
                        limit=2),
                    keywords=KeywordsOptions(
                        emotion=True,
                        sentiment=True,
                        limit=2)),
                language='en'
                )
            print(json.dumps(response, indent=2))

Answer 1

就是这样错误:无效请求:内容为空无内容或无效字符。您建议使用 \n 之类的字符，而您只检查了空字符。