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我正嘗試使用HTMLQuestion數據結構和boto3的create_hit函數來構建XML以提交給Amazon的Mechanical Turks服務。根據文檔，XML應格式化爲like this。爲boto3構建HTMLQuestion XML MTurk
我創建了一個TurkTaskAssembler類，該類具有用於生成XML並通過API將此XML傳遞到Mechanical Turks平臺的方法。我使用boto3庫來處理與亞馬遜的溝通。
似乎是我生成的格式不正確，因爲當我試圖通過API通過這個XML，我得到驗證錯誤，像這樣的XML：
>>> 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'>
我再修改create_question_xml方法將XML轉換信封使用tostring方法的字符串，但這種生成一個不同的錯誤：
>>> 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)
我真的不知道我在做什麼錯的，很少有XML的經驗。
這裏是所有相關代碼：
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
這是一個很棒的建議，謝謝！完美的作品。 –