为 boto3 MTurk 构建 HTMLQuestion XML

Question

为 boto3 MTurk 构建 HTMLQuestion XML

我正在尝试使用 HTMLQuestion 数据结构和 boto3 的create_hit函数构建 XML 以提交给 Amazon 的 Mechanical Turks 服务。根据文档，XML 的格式应该是这样的。

我创建了一个类TurkTaskAssembler，它具有生成 xml 并通过 API 将此 XML 传递到 Mechanical Turks 平台的方法。我使用 boto3 库来处理与亚马逊的通信。

我生成的 XML 的格式似乎不正确，因为当我尝试通过 API 传递此 XML 时，出现验证错误，如下所示：

>>> tta = TurkTaskAssembler("What color is the sky?")
>>> response = tta.create_hit_task()
>>> ParamValidationError: Parameter validation failed: Invalid type for parameter Question, value: <Element HTMLQuestion at 0x1135f68c0>, type: <type 'lxml.etree._Element'>, valid types: <type 'basestring'>

Run Code Online (Sandbox Code Playgroud)

然后我修改了create_question_xml使用该tostring方法将 XML 信封转换为字符串的方法，但这会产生不同的错误：

>>> tta = TurkTaskAssembler("What color is the sky?")
>>> tta.create_hit_task()
>>> ClientError: An error occurred (ParameterValidationError) when calling the CreateHIT operation: There was an error parsing the XML question or answer data in your request.  Please make sure the data is well-formed and validates against the appropriate schema. Details: cvc-elt.1.a: Cannot find the declaration of element 'HTMLQuestion'. (1508611228659 s)

Run Code Online (Sandbox Code Playgroud)

我真的不确定我做错了什么并且几乎没有 XML 经验。

以下是所有相关代码：

import os
import boto3
from lxml.etree import Element, SubElement, CDATA, tostring
from .settings import mturk_access_key_id, mturk_access_secret_key

xml_schema_url = 'http://mechanicalturk.amazonaws.com/AWSMechanicalTurkDataSchemas/2011-11-11/HTMLQuestion.xsd'


class TurkTaskAssembler(object):

    def __init__(self, question):
        self.client = boto3.client(
            service_name='mturk',
            region_name='us-east-1',
            endpoint_url='https://mturk-requester-sandbox.us-east-1.amazonaws.com',
            aws_access_key_id=mturk_access_key_id,
            aws_secret_access_key=mturk_access_secret_key
        )
        self.question = question

    def create_question_xml(self):
        # questionFile = open(os.path.join(__location__, "question.xml"), "r")
        # question = questionFile.read()
        # return question
        XHTML_NAMESPACE = xml_schema_url
        XHTML = "{%s}" % XHTML_NAMESPACE
        NSMAP = {
            None : XHTML_NAMESPACE,
            'xsi': 'http://www.w3.org/2001/XMLSchema-instance',
            ''
            }
        envelope = Element("HTMLQuestion", nsmap=NSMAP)

        html =  """
            <!DOCTYPE html>
            <html>
             <head>
              <meta http-equiv='Content-Type' content='text/html; charset=UTF-8'/>
              <script type='text/javascript' src='https://s3.amazonaws.com/mturk-public/externalHIT_v1.js'></script>
             </head>
             <body>
              <form name='mturk_form' method='post' id='mturk_form' action='https://www.mturk.com/mturk/externalSubmit'>
              <input type='hidden' value='' name='assignmentId' id='assignmentId'/>
              <h1>Answer this question</h1>
              <p>{question}</p>
              <p><textarea name='comment' cols='80' rows='3'></textarea></p>
              <p><input type='submit' id='submitButton' value='Submit' /></p></form>
              <script language='Javascript'>turkSetAssignmentID();</script>
             </body>
            </html>
            """.format(question=self.question)

        html_content = SubElement(envelope, 'HTMLContent')
        html_content.text = CDATA(html)
        xml_meta = """<?xml version="1.1" encoding="utf-8"?>"""
        return xml_meta + tostring(envelope, encoding='utf-8')

    def create_hit_task(self):
        response = self.client.create_hit(
            MaxAssignments=1,
            AutoApprovalDelayInSeconds=10800,
            LifetimeInSeconds=10800,
            AssignmentDurationInSeconds=300,
            Reward='0.05',
            Title='a title',
            Keywords='some keywords',
            Description='a description',
            Question=self.create_question_xml(),
        )
        return response

Run Code Online (Sandbox Code Playgroud)

Answer 1

Man*_*ro1 5

为什么不简单地将 XML 数据放在一个单独的 XML 文件中（如您所做的，但已注释掉）？这将使您不必合并多个模块和大量代码。

使用您在此处描述的模板，创建question.xml：

<HTMLQuestion xmlns="http://mechanicalturk.amazonaws.com/AWSMechanicalTurkDataSchemas/2011-11-11/HTMLQuestion.xsd">
  <HTMLContent><![CDATA[
<!DOCTYPE html>
<html>
 <head>
  <meta http-equiv='Content-Type' content='text/html; charset=UTF-8'/>
  <script type='text/javascript' src='https://s3.amazonaws.com/mturk-public/externalHIT_v1.js'></script>
 </head>
 <body>
  <form name='mturk_form' method='post' id='mturk_form' action='https://www.mturk.com/mturk/externalSubmit'>
  <input type='hidden' value='' name='assignmentId' id='assignmentId'/>
  <h1>Answer this question</h1>
  <p>{question}</p>
  <p><textarea name='comment' cols='80' rows='3'></textarea></p>
  <p><input type='submit' id='submitButton' value='Submit' /></p></form>
  <script language='Javascript'>turkSetAssignmentID();</script>
 </body>
</html>
]]>
  </HTMLContent>
  <FrameHeight>450</FrameHeight>
</HTMLQuestion>

Run Code Online (Sandbox Code Playgroud)

然后在你的create_question_xml()函数中：

def create_question_xml(self):
    question_file = open("question.xml", "r").read()
    xml = question_file.format(question=self.question)
    return xml

Run Code Online (Sandbox Code Playgroud)

这应该就是你所需要的。

归档时间：	8 年，1 月前
查看次数：	841 次
最近记录：	8 年，1 月前