Python rdbms API不可用，因为无法加载MySQLdb库

我尝试用本地Mysql调试google app engine应用程序，因为经过一些编码后，然后将其部署到google app engine，访问网站，然后从app engine控制台的日志中查看日志，这需要花费大量时间，而且不方便。但是在我安装了Mysql和Mysql python之后，总是有一个问题，我检查了一下互联网，有很多老帖子在讨论类似的问题，但是没有一个能解决我的问题

我的开发环境：

 Mac 10.7.3, App-Engine 1.6.4, Python 2.7.1,  Mysql  5.5.23 

启动app engine开发服务器并记录：

INFO     2012-04-18 08:45:36,212 py_zipimport.py:148] zipimporter('/Library/Python/2.7/site-packages/MySQL_python-1.2.3-py2.7-macosx-10.7-intel.egg', 'MySQLdb/')
WARNING  2012-04-18 08:45:36,350 rdbms_mysqldb.py:74] The rdbms API is not available because the MySQLdb library could not be loaded.

INFO     2012-04-18 08:45:36,484 appengine_rpc.py:160] Server: appengine.google.com
INFO     2012-04-18 08:45:36,488 appcfg.py:582] Checking for updates to the SDK.
DEBUG    2012-04-18 08:45:36,490 appengine_rpc.py:365] Sending HTTPS request:
POST /api/updatecheck?release=1.6.4&timestamp=1330713524&runtime=python27&api_versions=%5B%271%27%5D HTTPS/1.1
Host: appengine.google.com
X-appcfg-api-version: 1
Content-type: application/octet-stream
User-agent: appcfg_py/1.6.4 Darwin/11.3.0 Python/2.7.1.final.0


INFO     2012-04-18 08:45:38,001 appcfg.py:616] This SDK release is newer than the advertised release.
INFO     2012-04-18 08:45:38,075 dev_appserver_multiprocess.py:647] Running application dev~myapp on port 8080: http://localhost:8080
INFO     2012-04-18 08:45:38,076 dev_appserver_multiprocess.py:649] Admin console is available at: http://localhost:8080/_ah/admin

访问并记录：

DEBUG    2012-04-18 08:48:19,608 dev_appserver.py:656] Matched "/" to CGI dispatcher with path main.app
DEBUG    2012-04-18 08:48:19,622 dev_appserver.py:1624] Executing CGI with env:
{'HTTP_ACCEPT': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'HTTP_CONNECTION': 'keep-alive', '_AH_THREADSAFE': '1', 'REQUEST_ID_HASH': 'B6589FC6', 'CURRENT_VERSION_ID': '1.1', 'SERVER_SOFTWARE': 'Development/1.0', 'SCRIPT_NAME': '', 'USER_ORGANIZATION': '', 'REQUEST_METHOD': 'GET', 'HTTP_HOST': 'localhost:8080', 'PATH_INFO': '/', 'SERVER_PROTOCOL': 'HTTP/1.0', 'QUERY_STRING': '', 'TZ': 'UTC', 'USER_EMAIL': '', 'CONTENT_LENGTH': '', 'USER_ID': '', 'APPENGINE_RUNTIME': 'python27', 'APPLICATION_ID': 'dev~myapp', 'HTTP_USER_AGENT': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/534.55.3 (KHTML, like Gecko) Version/5.1.5 Safari/534.55.3', 'SERVER_NAME': 'localhost', 'REMOTE_ADDR': '127.0.0.1', 'CONTENT_TYPE': 'application/x-www-form-urlencoded', 'GATEWAY_INTERFACE': 'CGI/1.1', 'HTTP_ACCEPT_LANGUAGE': 'en-us', 'SDK_VERSION': '1.6.4', 'PATH_TRANSLATED': '/Users/Dajie/Workspace/Python/myapp/main.app', 'SERVER_PORT': '8080', '_AH_ENCODED_SCRIPT_NAME': '/', 'AUTH_DOMAIN': 'gmail.com'}
WARNING  2012-04-18 08:48:19,625 py_zipimport.py:139] Can't open zipfile /Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg: IOError: [Errno 13] file not accessible: '/Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg'
WARNING  2012-04-18 08:48:19,626 py_zipimport.py:139] Can't open zipfile /Library/Python/2.7/site-packages/WebOb-1.2b3-py2.7.egg: IOError: [Errno 13] file not accessible: '/Library/Python/2.7/site-packages/WebOb-1.2b3-py2.7.egg'
ERROR    2012-04-18 08:48:19,863 wsgi.py:189] 
Traceback (most recent call last):
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/runtime/wsgi.py", line 187, in Handle
    handler = _config_handle.add_wsgi_middleware(self._LoadHandler())
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/runtime/wsgi.py", line 225, in _LoadHandler
    handler = __import__(path[0])
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver_import_hook.py", line 676, in Decorate
    return func(self, *args, **kwargs)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver_import_hook.py", line 1850, in load_module
    return self.FindAndLoadModule(submodule, fullname, search_path)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver_import_hook.py", line 676, in Decorate
    return func(self, *args, **kwargs)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver_import_hook.py", line 1722, in FindAndLoadModule
    description)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver_import_hook.py", line 676, in Decorate
    return func(self, *args, **kwargs)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver_import_hook.py", line 1665, in LoadModuleRestricted
    description)
  File "/Users/Dajie/Workspace/Python/myapp/main.py", line 22, in <module>
    import MySQLdb
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver_import_hook.py", line 676, in Decorate
    return func(self, *args, **kwargs)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver_import_hook.py", line 1850, in load_module
    return self.FindAndLoadModule(submodule, fullname, search_path)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver_import_hook.py", line 676, in Decorate
    return func(self, *args, **kwargs)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver_import_hook.py", line 1722, in FindAndLoadModule
    description)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver_import_hook.py", line 676, in Decorate
    return func(self, *args, **kwargs)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver_import_hook.py", line 1647, in LoadModuleRestricted
    return source_file.load_module(submodule_fullname)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/dist/py_zipimport.py", line 246, in load_module
    submodname, is_package, fullpath, source = self._get_source(fullmodname)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/dist/py_zipimport.py", line 207, in _get_source
    source = self.zipfile.read(relpath.replace(os.sep, '/'))
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/zipfile.py", line 867, in read
    return self.open(name, "r", pwd).read()
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/zipfile.py", line 882, in open
    zef_file = open(self.filename, 'rb')
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver_import_hook.py", line 592, in __init__
    raise IOError(errno.EACCES, 'file not accessible', filename)
IOError: [Errno 13] file not accessible: '/Library/Python/2.7/site-packages/MySQL_python-1.2.3-py2.7-macosx-10.7-intel.egg'
INFO     2012-04-18 08:48:19,882 dev_appserver.py:2884] "GET / HTTP/1.1" 500 -

DEBUG 2012-04-18 08:48:19608 dev_appserver.py:656]与路径main.app的CGI dispatcher匹配“/”
调试2012-04-18 08:48:19622 dev_appserver.py:1624]使用env执行CGI：
{'HTTP_-ACCEPT'：'text/html，application/xhtml+xml，application/xml；q=0.9，*/*；q=0.8'，'HTTP_-CONNECTION'：'keep-alive'，'u-ahu-THREADSAFE'：'1'，'REQUEST_-ID_-HASH'：'B6589FC6'，'CURRENT_-VERSION_-ID'：'1.1'，'SERVER_-SOFTWARE'：'Development/1.0'，'SCRIPT u-NAME'，'USER_-ORGANIZATION'：''，'s'，'USER_-ORGANIZATION'：'s'，'s'，'s'，'REQUEST_-METHOD'GET'，'HTTP_-HOST“/”，“服务器协议”：“HTTP/1.0”，“查询字符串”：“TZ”：“UTC”，“用户电子邮件”：“内容长度”：“用户ID”：“APPENGINE_运行时”：“python27”，“应用程序ID”：“dev~myapp”，“HTTP_用户代理”：“Mozilla/5.0（Macintosh；英特尔Mac OS X 10_7_3）AppleWebKit/534.55.3（KHTML，如Gecko）版本/5.1.5 Safari/534.55.3”，“服务器名称”：“本地主机”，“远程地址”：“127.0.0.1”，“内容类型”：“应用程序/x-www-form-urlencoded”，“网关接口”：“CGI/1.1”，“HTTP_接受语言”：“en-us”，“SDK版本”：“1.6.4”，“路径翻译”：“/Users/Dajie/Workspace/Python/myapp/main.app”，“服务器端口”：“8080”，“u-AH-ENCODED”脚本名称”：/“，'AUTH_DOMAIN'：'gmail.com'}
警告2012-04-18 08:48:19625 py_zipimport.py:139]无法打开zipfile/Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg:IOError:[Errno 13]文件不可访问：'/Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg'
警告2012-04-18 08:48:19626 py_zipimport.py:139]无法打开zipfile/Library/Python/2.7/site-packages/WebOb-1.2b3-py2.7.egg:IOError:[Errno 13]文件不可访问：'/Library/Python/2.7/site-packages/WebOb-1.2b3-py2.7.egg'
错误2012-04-18 08:48:19863 wsgi.py:189]
回溯（最近一次呼叫最后一次）：
文件“/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine default.bundle/Contents/Resources/google\u appengine/google/appengine/runtime/wsgi.py”，第187行，在句柄中
handler=\u config\u handle.add\u wsgi\u中间件（self.\u LoadHandler（））
文件“/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine default.bundle/Contents/Resources/google\u appengine/google/appengine/runtime/wsgi.py”，第225行，在LoadHandler中
处理程序=\uuuu导入\uuuu（路径[0]）
文件“/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine default.bundle/Contents/Resources/google\u appengine/google/appengine/tools/dev\u appserver\u import\u hook.py”，第676行
返回函数（self、*args、**kwargs）
文件“/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine default.bundle/Contents/Resources/google\u appengine/google/appengine/tools/dev\u appserver\u import\u hook.py”，第1850行，在加载模块中
返回self.findLoadModule（子模块、全名、搜索路径）
文件“/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine default.bundle/Contents/Resources/google\u appengine/google/appengine/tools/dev\u appserver\u import\u hook.py”，第676行
返回函数（self、*args、**kwargs）
文件“/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine default.bundle/Contents/Resources/google\u appengine/google/appengine/tools/dev\u appserver\u import\u hook.py”，第1722行，位于FindLoadModule中
（说明）
文件“/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine default.bundle/Contents/Resources/google\u appengine/google/appengine/tools/dev\u appserver\u import\u hook.py”，第676行
返回函数（self、*args、**kwargs）
LoadModuleRequired中的文件“/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine/google/appengine/tools/dev_appserver\u import\u hook.py”第1665行
（说明）
文件“/Users/Dajie/Workspace/Python/myapp/main.py”，第22行，在
导入MySQLdb
文件“/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine default.bundle/Contents/Resources/google\u appengine/google/appengine/tools/dev\u appserver\u import\u hook.py”，第676行
返回函数（self、*args、**kwargs）
文件“/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine default.bundle/Contents/Resources/google\u appengine/google/appengine/tools/dev\u appserver\u import\u hook.py”，第1850行，在加载模块中
返回self.findLoadModule（子模块、全名、搜索路径）
文件“/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine default.bundle/Contents/Resources/google\u appengine/google/appengine/tools/dev\u appserver\u import\u hook.py”，第676行
返回函数（self、*args、**kwargs）
文件“/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine default.bundle/Contents/Resources/google\u appengine/google/appengine/tools/dev\u appserver\u import\u hook.py”，第1722行，位于FindLoadModule中
（说明）
文件“/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine default.bundle/Contents/Resources/google\u appengine/google/appengine/tools/dev\u appserver\u import\u hook.py”，第676行
返回函数（self、*args、**kwargs）
文件“/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine default.bundle/Contents/Resources/google\u appengine/google/appengine/tools/dev\u appserver\u import\u hook.py”，第1647行，在LoadModule中
ImportError: dlopen(/Users/Dajie/.python-eggs/MySQL_python-1.2.3-py2.7-macosx-10.7-intel.egg-tmp/_mysql.so, 2): Library not loaded: libmysqlclient.18.dylib
  Referenced from: /Users/Dajie/.python-eggs/MySQL_python-1.2.3-py2.7-macosx-10.7-intel.egg-tmp/_mysql.so
  Reason: image not found

$ sudo ln -s /usr/local/mysql/lib/libmysqlclient.18.dylib /usr/lib/libmysqlclient.18.dylib