4

更新：这是我在全新安装的 OS X 10.8.3 上使用 1.8.0 App Engine SDK 时遇到的问题。

首先 - 关于 SO 有很多类似标题的问题。我已经检查过了，我不相信他们会回答我的问题。大多数情况下，他们建议获取 libsqlite3-dev 并重建 python 以获取 _sqlite3.so，但这已经是它应该在的地方：

$ 查找 / -name _sqlite3.so
密码：
...
/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/lib-dynload/_sqlite3.so
/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-dynload/_sqlite3.so
/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_sqlite3.so

导致应用引擎 SDK 尝试加载该模块的实际代码是：


remaining = TaskSetElement.all().filter('taskSet', ts_key).filter('complete', False).count()

这是 SDK 堆栈跟踪：


  File "~/dev/myApp/myApp/task.py", line 90, in completeTaskSetElement
    remaining = TaskSetElement.all().filter('taskSet', ts_key).filter('complete', False).count()
  File "~/dev/GAE/google_appengine/google/appengine/ext/db/__init__.py", line 2133, in count
    result = raw_query.Count(limit=limit, **kwargs)
  File "~/dev/GAE/google_appengine/google/appengine/api/datastore.py", line 1698, in Count
    batch = self.GetBatcher(config=config).next()
  File "~/dev/GAE/google_appengine/google/appengine/datastore/datastore_query.py", line 2754, in next
    return self.next_batch(self.AT_LEAST_ONE)
  File "~/dev/GAE/google_appengine/google/appengine/datastore/datastore_query.py", line 2791, in next_batch
    batch = self.__next_batch.get_result()
  File "~/dev/GAE/google_appengine/google/appengine/api/apiproxy_stub_map.py", line 604, in get_result
    return self.__get_result_hook(self)
  File "/Users/colin/dev/GAE/google_appengine/google/appengine/datastore/datastore_query.py", line 2528, in __query_result_hook
    self._batch_shared.conn.check_rpc_success(rpc)
  File "~/dev/GAE/google_appengine/google/appengine/datastore/datastore_rpc.py", line 1222, in check_rpc_success
    rpc.check_success()
  File "~/dev/GAE/google_appengine/google/appengine/api/apiproxy_stub_map.py", line 570, in check_success
    self.__rpc.CheckSuccess()
  File "/Users/colin/dev/GAE/google_appengine/google/appengine/api/apiproxy_rpc.py", line 156, in _WaitImpl
    self.request, self.response)
  File "~/dev/GAE/google_appengine/google/appengine/ext/remote_api/remote_api_stub.py", line 200, in MakeSyncCall
    self._MakeRealSyncCall(service, call, request, response)
  File "~/dev/GAE/google_appengine/google/appengine/ext/remote_api/remote_api_stub.py", line 234, in _MakeRealSyncCall
    raise pickle.loads(response_pb.exception())
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pickle.py", line 1382, in loads
    return Unpickler(file).load()
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pickle.py", line 858, in load
    dispatch[key](self)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pickle.py", line 1090, in load_global
    klass = self.find_class(module, name)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pickle.py", line 1124, in find_class
    __import__(module)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sqlite3/__init__.py", line 24, in 
    from dbapi2 import *
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sqlite3/dbapi2.py", line 27, in 
    from _sqlite3 import *
  File "~/dev/GAE/google_appengine/google/appengine/tools/devappserver2/python/sandbox.py", line 856, in load_module
    raise ImportError('No module named %s' % fullname)
ImportError: No module named _sqlite3

在此行之前，我有一堆数据存储区代码执行得很好。我直接从命令行或在 Eclipse 中使用 pydev 运行 dev_appserver.py 时遇到了同样的问题。

从命令行，一切看起来都不错：

$蟒蛇
Python 2.7.2（默认，2012 年 10 月 11 日，20:14:37）
[GCC 4.2.1 兼容 Apple Clang 4.0 (tags/Apple/clang-418.0.60)] 在 darwin
输入“帮助”、“版权”、“信用”或“许可”以获取更多信息。
>>> 导入 sqlite3
>>> 导入 _sqlite3
>>> 导入系统
>>> 打印（系统路径）
['', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat -mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/System/Library/Frameworks/Python.framework/Versions/2.7 /Extras/lib/python', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7 /lib/python2.7/lib-old'，'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload'，'/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC', '/Library/Python/2.7/site-packages']
>>>

此代码片段（在应用引擎 SDK 中运行）从等式中删除了应用引擎数据存储区代码：


...
logging.info("Python Version: %s" % sys.version)
logging.info(filter(lambda p: 'lib-dynload' in p, sys.path))

import sqlite3
...

它输出这个：

INFO 2013-05-26 05:55:12,055 main.py:38] Python 版本：2.7.2（默认，2012 年 10 月 11 日，20:14:37）
[GCC 4.2.1 兼容 Apple Clang 4.0 (tags/Apple/clang-418.0.60)]
信息 2013-05-26 05:55:12,055 main.py:40] ['/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload']
错误 2013-05-26 05:55:12,058 cgi.py:121] Traceback（最近一次通话最后一次）：
  文件“main.py”，第 42 行，在
    导入 sqlite3
  文件“/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sqlite3/__init__.py”，第 24 行，在
    从 dbapi2 导入 *
  文件“/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sqlite3/dbapi2.py”，第 27 行，在
    从 _sqlite3 导入 *
  文件“~/dev/GAE/google_appengine/google/appengine/tools/devappserver2/python/sandbox.py”，第 856 行，在 load_module
    raise ImportError('No module named %s' % fullname)
ImportError：没有名为 _sqlite3 的模块

任何想法是什么问题？谢谢，

科林

4

3 回答 3

8

It looks like adding '_sqlite3' to the _WHITE_LIST_C_MODULES list at line 742 in sandbox.py (which lives at /Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/devappserver2/python on my machine) has worked for me for now.

To my uneducated eye it looks like CModuleImportHook is incorrectly blocking the import of _sqlite3 and that modifying any one of the checks it has to return None removes the error. Someone with more nous - please expand on what I've said or correct me!

That change may allow you to import _sqlite3 in your own code, which would be a mistake. Perhaps it needs a way to limit the import to dbapi2.py?

于 2013-06-03T13:38:34.750 回答
2

从您的堆栈跟踪中，它显示您正在尝试在 main.py 中导入 sqlite。

你为什么做这个？

appengine 不支持导入 sqlite。sqlite 是用二进制库实现的，你不能只导入任何旧的二进制文件。此外，文件系统是只读的，您无法写入 sqlite db。

于 2013-05-26T08:57:08.990 回答
0

您提到这是 OSX 的全新安装。我想知道你是否使用 Homebrew 来构建 Python？做 Brew-update 或 brew-upgrade 给我带来了与此类似的问题，尽管不是在 GAE 上。您可能会发现https://github.com/mxcl/homebrew/issues/17312很有用。

于 2013-06-04T18:54:18.347 回答