Question

在Bluemix中，我试图从Python调用IBM Watson关系提取API。首先，我在Bluemix上创建一个应用程序，并将关系提取器api绑定到它。然后从API的下拉菜单中，我从实例化凭据中获取用户名和密码。我在下面的系列中用 bluemux-username 和 bluemix-password 替换了。我为此编写的Python代码如下：

import requests
import json

url="https://gateway.watsonplatform.net/relationship-extraction-beta/api/v1/sire/0"
username="bluemix_username"
password="bluemix_passowrd"
with open ("data.txt", "r") as myfile:
    text=myfile.read().replace('\n', '')

raw_data = {
    'contentItems' : [{
        'contenttype' : 'text/plain',
        'content': text
    }]
}

input_data = json.dumps(raw_data)


response = requests.post(url, auth=(username, password), headers =   {'content-type': 'application/json'}, data=input_data)
try:
    response.raise_for_status()
except requests.exceptions.HTTPError as e:
    print("And you get an HTTPError: %s"% e.message)

然而，当我运行此操作时，我收到以下错误：

And you get an HTTPError: 400 Client Error: Bad Request

*注意：我对个性洞察 API采用了相同的方法，并且有效。

有什么想法吗？

由于

Answer 1

以下是应该运行的代码的更新副本：

import requests
import json

url="https://gateway.watsonplatform.net/relationship-extraction-beta/api/v1/sire/0"
username="bluemix_username"
password="bluemix_passowrd"
with open ("data.txt", "r") as myfile:
    text=myfile.read().replace('\n', '')

input_data = {
    'sid' : 'ie-en-news',
    'txt' : text
}

response = requests.post(url, auth=(username, password), data=input_data)
try:
    response.raise_for_status()
    print response.text
except requests.exceptions.HTTPError as e:
    print("And you get an HTTPError: %s"% e.message)

基本上我更改了您发布的有效负载以添加一些缺失值。

希望这有帮助！

Answer 2

如果您不想使用data.txt并使用终端中的标准输入，您可以执行以下操作：

## -*- coding: utf-8 -*-

import os
import requests
import fileinput

class RelationshipExtractionService:
    url = None

    def __init__(self):
        self.url = "https://gateway.watsonplatform.net/relationship-extraction-beta/api/v1/sire/0"
        self.user = "<username>"
        self.password = "<password>"

    def extract(self, text):
        data = {
            'txt': text,
            'sid': 'ie-en-news',  # English News, for Spanish use: ie-es-news
            'rt': 'xml',
        }

        r = requests.post(self.url,
                          auth=(self.user, self.password),
                          headers = {
                              'content-type': 'application/x-www-form-urlencoded'},
                          data=data
                          )
        print("Request sent. Status code: %d, content-type: %s" %
              (r.status_code, r.headers['content-type']))
        if r.status_code != 200:
            print("Result %s" % r.text)
            raise Exception("Error calling the service.")
        return r.text

if __name__ == '__main__':
    service = RelationshipExtractionService()
    for line in fileinput.input():
        print service.extract(line)

<强>用法

简单文本分析：
echo "New York is awesome" | python main.py

您也可以管道文件：
cat article.txt | python main.py

从.txt到.xml：
cat article.txt | python main.py > article.xml

对IBM Watson Relationship提取的POST请求返回错误

2 个答案: