0

在 Bluemix 中,我尝试从 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。在下面的 coe 中,我已将其替换为bluemux-usernamebluemix-password。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)

但是,当我运行它时,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使用了相同的方法,并且有效。

有任何想法吗?

谢谢

4

2 回答 2

1

这是您的代码的更新副本,应该可以工作:

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。

希望这可以帮助!

于 2015-03-11T00:36:39.313 回答
0

如果您不想data.txt在终端中使用和使用标准输入,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)

用法

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

您还可以通过管道传输文件:
cat article.txt | python main.py

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

于 2015-05-09T04:49:51.883 回答