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對IBM Watson Relationship Extract的POST請求返回錯誤

[英]POST request to IBM Watson Relationship extraction returns error

在Bluemix中,我試圖從Python調用IBM Watson關系提取API。 首先,我在Bluemix上創建一個應用程序,並將關系提取器api綁定到該應用程序。 然后,從API的下拉菜單中,我從實例化憑據中獲得用戶名和密碼。 在下面的代碼中,我已將它們替換為bluemux-usernamebluemix-password 我為此編寫的Python代碼如下:

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,當我運行此命令時,出現以下錯誤:

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

*注意:我使用與個性見解 API相同的方法,並且有效。

有任何想法嗎?

謝謝

這是應該工作的代碼的更新副本:

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,我更改了要發布的有效負載以添加一些缺失值。

希望這可以幫助!

如果您不想使用data.txt並在終端中使用標准輸入,則可以執行以下操作:

## -*- 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

簡單文本分析:
echo "New York is awesome" | python main.py

您還可以通過管道傳輸文件:
cat article.txt | python main.py

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

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