基于 IBM Watson/Bluemix 的 Python 应用程序在查询 Tone Analyzer API 时返回 404 subcode C00010 错误

问：

我将以下代码的用户名、密码和 URL 值更新为我直接从 IBM Watson Service 凭证复制的值。出于某种原因，我收到以下错误。

法典：

import requests
import json

def analyze_tone(text):
    username = 'username-copied-from-watson'
    password = 'service-password-copied-from-watson'
    watsonUrl = 'https://gateway.watsonplatform.net/tone-analyzer/api'
    headers = {"content-type": "text/plain"}
    data = text
    try:
        r = requests.post(watsonUrl, auth=(username,password),headers = headers,
         data=data)
        return r.text
    except:
        return False

def welcome():
    message = "Welcome to the IBM Watson Tone Analyzer\n"
    print(message + "-" * len(message) + "\n")
    message = "How it works"
    print(message)
    message = "Perhaps a bit too aggressive in your emails? Are your blog posts a little too friendly? Tone Analyzer might be able to help. The service uses linguistic analysis to detect and interpret emotional, social, and writing cues found in text."
    print(message)
    print()
    print("Have fun!\n")

def display_results(data):
    data = json.loads(str(data))
    print(data)
    for i in data['document_tone']['tone_categories']:
        print(i['category_name'])
        print("-" * len(i['category_name']))
        for j in i['tones']:
            print(j['tone_name'].ljust(20),(str(round(j['score'] * 100,1)) + "%").rjust(10))
        print()
    print()

def main():
    welcome()

    data = input("Enter some text to be analyzed for tone analysis by IBM Watson (Q to quit):\n")
    if len(data) >= 1:
        if data == 'q'.lower():
            exit
        results = analyze_tone(data)
        if results != False:
            display_results(results)
            exit
        else:
            print("Something went wrong")

main()

错误：

Enter some text to be analyzed for tone analysis by IBM Watson (Q to quit):
"I love hate you"

{u'sub_code': u'C00010', u'code': 404, u'error': u'Not Found'}
Traceback (most recent call last):
  File "test.py", line 58, in <module>
    main()
  File "test.py", line 53, in main

display_results(results)