在pythonanywhere上运行Python脚本时出现XML解析错误（本地机器正常）

Question

我正在用Python运行一个Flask应用，其中一部分使用从第三方API获取的XML数据。我在Python脚本中使用minidom来解析这些XML。

相关的Python代码：

from xml.dom import minidom
import requests

usa_xml = requests.get(URL_HERE)
usa_parsed = minidom.parseString(usa_xml.content)

这个脚本会找到并显示XML中的值。在我本地机器上运行这个Python脚本时，一切都正常。但当我把代码放到pythonanywhere上时，解析却失败了，尽管使用的是相同的XML数据。

错误追踪信息：

Traceback (most recent call last):
  File "/usr/local/lib/python3.4/dist-packages/flask/app.py", line 1817, in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/local/lib/python3.4/dist-packages/flask/app.py", line 1477, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/local/lib/python3.4/dist-packages/flask/app.py", line 1381, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/local/lib/python3.4/dist-packages/flask/_compat.py", line 33, in reraise
    raise value
  File "/usr/local/lib/python3.4/dist-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/local/lib/python3.4/dist-packages/flask/app.py", line 1461, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/jshorty/OwlWire/owlwire.py", line 65, in select
    usa_parsed = minidom.parseString(usa_xml.content)
  File "/usr/lib/python3.4/xml/dom/minidom.py", line 1970, in parseString
    return expatbuilder.parseString(string)
  File "/usr/lib/python3.4/xml/dom/expatbuilder.py", line 925, in parseString
    return builder.parseString(string)
  File "/usr/lib/python3.4/xml/dom/expatbuilder.py", line 223, in parseString
    parser.Parse(string, True)
xml.parsers.expat.ExpatError: no element found: line 29, column 7

因为使用的XML数据是一样的，所以看起来问题不在于XML本身。我不知道该从哪里开始找问题——我在pythonanywhere上使用的是所有默认预装的模块，这会不会是minidom版本不同的问题呢？

错误总是在第29行，第7列，所以这里有一个我正在访问的XML实例的链接： http://ebird.org/ws1.1/data/obs/region_spp/recent?rtype=country&r=US&sci=surnia%20ulula&back=30&maxResults=1&includeProvisional=true

错误追踪数据解析版本兼容性 xml解析 minidom flask应用 pythonanywhere 第三方API

在pythonanywhere上运行Python脚本时出现XML解析错误（本地机器正常）

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