google-app-engine - 模板错误。尝试从 webapp+python2.5 迁移到 webapp2+python2.7.4

Question

您好，在 Google App Engine 中尝试从 python2.5/webapp 迁移到 python2.7.4/webapp2 时出现以下错误。

File "C:\main\main.py", in get
**compiled_template = template.Template(template_file.read())**

File "C:\Program Files     (x86)\Google\google_appengine\google\appengine\_internal\django\template\__init__.py", line 156, in __init__
if settings.TEMPLATE_DEBUG and origin is None:

 File "C:\Program Files (x86)\Google\google_appengine\google\appengine\_internal\django\conf\__init__.py", line 31, in __getattr__
assert self.holder, 'settings has not been configured in this thread'

AssertionError: settings has not been configured in this thread

这是完整的代码：

---

main.py 文件

---

import webapp2
import os
os.environ['DJANGO_SETTINGS_MODULE'] = 'settings' 
try:
    from google.appengine.dist import use_library
    use_library('django', '1.2')
except:
    pass
from django.conf import settings
_ = settings.TEMPLATE_DIRS
from google.appengine.ext.webapp import template

class Main(webapp2.RequestHandler):
    def get(self):
        template_values = {
          'CURRENT_VERSION_ID': os.environ['CURRENT_VERSION_ID']
        }

        path = os.path.join(os.path.dirname(__file__), './src/main.html'); 
        path = os.path.normpath(path);
        template_file = open(path) 
        compiled_template = template.Template(template_file.read()) #THIS GIVES THE ERROR
        template_file.close()  
        self.response.out.write(compiled_template.render(template.Context(template_values)))
        return

        app = webapp2.WSGIApplication(
                             [
                              ('/', Main)
                             ],                                   
                             debug=True
                             )

---

app.yaml 文件

---

application: main
version: 1
runtime: python27
api_version: 1
threadsafe: true

derived_file_type:
- python_precompiled

libraries:
- name: yaml
  version: "3.10"
- name: webob
  version: "1.1.1"
- name: webapp2
  version: "2.5.2"
- name: django
  version: "1.2"

handlers:
- url: /.*
  script: main.app

你能帮忙吗？谢谢！（请注意，给出错误的行在 webapp+python2.5 中运行良好。只有在迁移到 webapp2+python2.7.4 之后，我才开始看到此错误。）