Google App Engine：ImportError：没有名为appengine.ext的模块(Google App Engine: ImportError: No module named appengine.ext)

 我正在尝试为使用数据存储的GAE程序编写测试。 遵循Google的文档 ，我发现我应该将我的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')
 
 然后当文件运行时： 
 
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
 
 我已经在上面的位置安装了SDK，并查看/home/olly/google-cloud-sdk/platform/google_appengine/我发现了google文件夹，里面有__init__.py ，以及appengine 。 基本上，文件夹结构看起来不错，他们都被正确命名并具有__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 
 
import google.appengine
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named appengine
 
 我的理解是，在目录中使用__init__.py()文件意味着它们可以像上面那样导入。 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 ，我明确删除了，无论如何也将我剩下的路径插入前面。 
 
 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，但仍然无法让它工作。 
 
 我还发现，当我将'/home/olly/Servers/google_appengine/google'到我的路径中时，我可以运行： 
 
import appengine.ext
 
 但运行： 
 
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?')
 
 此外， google.__path__给了我'/usr/local/lib/python2.7/dist-packages'路径，我认为我之前删除了它。 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被更新了，但是import google似乎仍然是从不存在的路径导入的，这可能是我的问题的关键。 我需要重新加载路径吗？ 

I am trying to write a test for my GAE programme which uses the datastore. Following Google's Documentation, I see that I should be adding the path to my SDK into my PYTHONPATH. I did this using:
 
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')
 
Then when the file is run:
 
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
 
I have installed the SDK in the location above, and looking in /home/olly/google-cloud-sdk/platform/google_appengine/ I found the google folder, which has an __init__.py in it, along with appengine. Basically, the folder structure looks good to me, with them all being named correctly and having __init__.py files.
 
In an interactive console, after running the commands above, I found that I could run:
 
import google
 
no problem, but when I tried 
 
import google.appengine
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named appengine
 
It was my understanding that having the __init__.py() files in the directories meant that they could be imported as above. I also did a sudo find / --name "google", and the only thing that showed up that is also in my PYTHONPATH was the /usr/local/lib/python2.7/dist-packages, which I explicitly removed, and also inserted the rest of my paths in front of anyway.
 
I tried using GAE's own method of:
 
import dev_appserver
dev_appserver.fix_sys_path()
 
which added a whole lot of paths to sys.path, but still didn't help me make it work.
 
I also found that when I add '/home/olly/Servers/google_appengine/google' to my paths, I can run:
 
import appengine.ext
 
but running:
 
from appengine.ext import ndb
 
causes: 
 
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
 
Am I missing something really obvious? How should I go about importing ndb?
 
EDIT: I'm running the latest SDK (1.9.34), but I have the following code in my google_imports.py:
 
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?')
 
Also, google.__path__ gives me the '/usr/local/lib/python2.7/dist-packages' path which I thought I removed earlier. Here is an excerpt of how I'm removing it:
 
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']
 
So my sys.path is updated, but import google seems to still be importing from the no-longer-there path, which would be the crux of my problem I guess. Do I need to reload the path or something?

原文：https://stackoverflow.com/questions/36022960