Google App Engine:ImportError:没有名为appengine.ext的模块

Question

我正在尝试为使用数据存储区的GAE程序编写测试.按照Google的文档,我看到我应该将SDK的路径添加到我的PYTHONPATH中.我这样做使用:

import sys
sys.path.remove('/usr/local/lib/python2.7/dist-packages')    # Has a 'google' module, which I want to be sure isn't interfering.
sys.path.insert(1,'/home/olly/google-cloud-sdk/platform/google_appengine')
sys.path.insert(1, '/home/olly/google-cloud-sdk/platform/google_appengine/lib/yaml/lib')

然后在运行文件时:

Traceback (most recent call last):
 File "myapp_tests.py", line 20, in <module>
    from google.appengine.ext import ndb
ImportError: No module named appengine.ext

我已经安装在上面的位置的SDK,并期待在/home/olly/google-cloud-sdk/platform/google_appengine/我发现google文件夹,里面有一个__init__.py在里面,沿着appengine.基本上,文件夹结构对我来说很好,它们都被正确命名并有__init__.py文件.

在交互式控制台中,运行上面的命令后,我发现我可以运行:

import google

没问题,但是当我尝试的时候

import google.appengine
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named appengine

我的理解是,在__init__.py()目录中包含文件意味着可以像上面那样导入它们.我也做了一个sudo find / --name "google",唯一出现在我的PYTHONPATH中的是/usr/local/lib/python2.7/dist-packages我明确删除的那个,并且还在我前面插入了其余的路径.

我尝试使用GAE自己的方法:

import dev_appserver
dev_appserver.fix_sys_path()

它为sys.path添加了很多路径,但仍然没有帮助我使它工作.

我还发现,当我添加'/home/olly/Servers/google_appengine/google'到我的路径时,我可以运行:

import appengine.ext

但是跑步:

from appengine.ext import ndb

原因:

Traceback (most recent call last):
  File "booking_function_tests.py", line 16, in <module>
     from appengine.ext import ndb
  File "/home/olly/Servers/google_appengine/google/appengine/ext/ndb/__init__.py", line 7, in <module>
     from tasklets import *
  File "/home/olly/Servers/google_appengine/google/appengine/ext/ndb/tasklets.py", line 69, in <module>
     from .google_imports import apiproxy_stub_map
  File "/home/olly/Servers/google_appengine/google/appengine/ext/ndb/google_imports.py"    , line 11, in <module>
     from google3.storage.onestore.v3 import entity_pb
ImportError: No module named google3.storage.onestore.v3

我错过了一些非常明显的东西吗 我该如何导入导入ndb？

编辑:我正在运行最新的SDK(1.9.34),但我在google_imports.py中有以下代码:

try:
  from google.appengine.datastore import entity_pb
  normal_environment = True
except ImportError:
  try:
    from google3.storage.onestore.v3 import entity_pb
    normal_environment = False
  except ImportError:
    # If we are running locally but outside the context of App Engine.
    try:
      set_appengine_imports()
      from google.appengine.datastore import entity_pb
      normal_environment = True
    except ImportError:
      raise ImportError('Unable to find the App Engine SDK. '
                        'Did you remember to set the "GAE" environment '
                        'variable to be the path to the App Engine SDK?')

另外,google.__path__给我'/usr/local/lib/python2.7/dist-packages'一条我认为之前删除的路径.以下是我如何删除它的摘录:

import sys
sys.path.insert(1, '/home/olly/Servers/google_appengine')
sys.path.insert(1, '/home/olly/Servers/google_appengine/lib/yaml/lib')
sys.path.remove('/usr/local/lib/python2.7/dist-packages')

import google
print google.__path__
print sys.path


['/usr/local/lib/python2.7/dist-packages/google']
['/home/olly/Servers/google_appengine/myapp', '/home/olly/Servers/google_appengine/lib/yaml/lib', '/home/olly/Servers/google_appengine/google', '/home/olly/Servers/google_appengine', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-x86_64-linux-gnu', '/usr/lib/python2.7/lib-tk', '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', '/usr/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages/PILcompat', '/usr/lib/python2.7/dist-packages/gtk-2.0', '/usr/lib/pymodules/python2.7', '/usr/lib/python2.7/dist-packages/ubuntu-sso-client', '/usr/lib/python2.7/dist-packages/wx-2.8-gtk2-unicode']

所以我的sys.path更新了,但import google似乎仍然是从不再存在的路径导入,这将是我猜的问题的关键.我需要重新加载路径吗？

Answer 1

总是在virtualenv中运行,我遇到的问题要少得多 .

我同意snakecharmerrb你应该打印google.__file__或google.__path_准确找出你要导入的内容.

此代码段也可以解决您的问题:

import google

gae_dir = google.__path__.append('/path/to/appengine_sdk//google_appengine/google')
sys.path.insert(0, gae_dir) # might not be necessary

import google.appengine # now it's on your import path`