Question

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 - 在SO上有一堆关于类似标题的问题。我已经检查过了，我不相信他们回答了我的问题。大多数情况下，他们建议使用libsqlite3-dev并重建python以获取_sqlite3.so，但这已经是应该的位置了：

$ find / -name _sqlite3.so
Password:
...
/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app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

我在此行之前有一堆数据存储区代码正常运行。我直接从命令行或在带有pydev的eclipse中运行dev_appserver.py会遇到同样的问题。

从命令行开始，一切看起来都不错：

$ python
Python 2.7.2 (default, Oct 11 2012, 20:14:37) 
[GCC 4.2.1 Compatible Apple Clang 4.0 (tags/Apple/clang-418.0.60)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sqlite3
>>> import _sqlite3
>>> import sys
>>> print(sys.path)
['', '/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']
>>>

此代码段（在app engine SDK中运行）会从以下等式中删除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
...

输出：

INFO     2013-05-26 05:55:12,055 main.py:38] Python Version: 2.7.2 (default, Oct 11 2012, 20:14:37) 
[GCC 4.2.1 Compatible Apple Clang 4.0 (tags/Apple/clang-418.0.60)]
INFO     2013-05-26 05:55:12,055 main.py:40] ['/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload']
ERROR    2013-05-26 05:55:12,058 cgi.py:121] Traceback (most recent call last):
  File "main.py", line 42, in 
    import sqlite3
  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

任何想法是什么问题？谢谢，

科林

Answer 1

在sandbox.py（生活在我的计算机上'_sqlite3'）第742行的_WHITE_LIST_C_MODULES列表中添加/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/devappserver2/python似乎已经为我工作了。

对于我没有受过教育的人看来，CModuleImportHook错误地阻止了_sqlite3的导入，修改它必须返回的任何一个检查None都会删除错误。有更多人的人 - 请扩展我所说的或纠正我！

该更改可能允许您在自己的代码中导入_sqlite3，这将是一个错误。也许它需要一种方法来限制导入到dbapi2.py？

Answer 2

从堆栈跟踪中，它显示您正在尝试在main.py中导入sqlite。

你为什么这样做？

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。另外，文件系统是只读的，你不能写入sqlite db。

Answer 3

你提到这是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会给我带来类似的问题，尽管不是GAE。您可能会发现https://github.com/mxcl/homebrew/issues/17312很有用。

OS X AppEngine - ImportError：没有名为_sqlite3的模块

3 个答案: