尝试使用 NDB 将 Google App Engine Python 2 应用程序迁移到 Cloud NDB Python 3 库时出现导入错误

Question

我目前正在着手 process 为 Python 3 迁移准备 App Engine 应用程序。在第一步中：

Migrate the App Engine bundled services in your Python 2 app to Google Cloud services ...

在所有 instructions 将数据存储模块从 google.appengine.ext.ndb 切换到 google.cloud.ndb 之后，我立即收到以下导入错误：

  File "/usr/lib/google-cloud-sdk/platform/google_appengine/google/appengine/runtime/wsgi.py", line 240, in Handle
handler = _config_handle.add_wsgi_middleware(self._LoadHandler())
  File "/usr/lib/google-cloud-sdk/platform/google_appengine/google/appengine/runtime/wsgi.py", line 311, in _LoadHandler
handler, path, err = LoadObject(self._handler)
  File "/usr/lib/google-cloud-sdk/platform/google_appengine/google/appengine/runtime/wsgi.py", line 85, in LoadObject
obj = __import__(path[0])
  File "/home/---.py", line 8, in <module>
from google.cloud import ndb
  File "/home/test_env/local/lib/python2.7/site-packages/google/cloud/ndb/__init__.py", line 28, in <module>
from google.cloud.ndb.client import Client
  File "/home/test_env/local/lib/python2.7/site-packages/google/cloud/ndb/client.py", line 23, in <module>
from google.cloud import _helpers
  File "/home/test_env/local/lib/python2.7/site-packages/google/cloud/_helpers.py", line 29, in <module>
from six.moves import http_client

ImportError: No module named moves

无论我是否在虚拟环境中进行测试，都会发生这种情况。导入 six.moves 在 python 控制台中工作。

Answer 1

显然这是捆绑测试服务器 dev_appserver.py 的问题。发现它已解决 here 由 Andrewsg:

I think we've identified an issue with devappserver related to the six library specifically. Could you please try a workaround? Add the line: import six; reload(six) to the top of your app, before NDB is loaded

尝试使用 NDB 将 Google App Engine Python 2 应用程序迁移到 Cloud NDB Python 3 库时出现导入错误

Import Error when trying to migrate Google App Engine Python 2 app using NDB to the Cloud NDB Python 3 library

migration

google-app-engine

python-2.7

app-engine-ndb