Reportlab不會在dev_appserver中加載

Question

我將reportlab與我的Google AppEngine項目一起使用，我無法使其與dev_appserver一起使用。它在生產中運行良好，沒有任何問題。我已將Reportlab作爲2.5.5源代碼中的整個目錄放入我的項目中，我沒有使用先前報告過此問題的zip版本。

它似乎第一次運行良好，但隨後的每一次似乎都有問題。我嘗試關閉所有東西並清除pyc文件，但似乎並沒有讓問題消失，但是如果我刪除整個Reportlab目錄並從源中重新複製它，那麼它將工作1次，並且再也不會工作。

我使用Python 2.7和NDB的最新SDK（1.6.6）和最新的生產Reportlab（2.5）。我的dev_appserver在Mac上運行osX Lion

這是我得到的回溯。

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 1858, 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/dramus/gatherthefamily/gtf.py", line 16, in <module> 
    from controllers.sharing import SharingPage, BookPage, BookTask 
    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 1858, 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/dramus/gatherthefamily/controllers/sharing.py", line 11, in <module> 
    from projects.bookmaker import BookMaker 
    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 1858, 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/dramus/gatherthefamily/projects/bookmaker.py", line 7, in <module> 
    from reportlab.lib.styles import ParagraphStyle as PS 
    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 1858, 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/dramus/gatherthefamily/reportlab/lib/styles.py", line 27, in <module> 
    from reportlab.rl_config import canvas_basefontname as _baseFontName 
    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 1858, 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/dramus/gatherthefamily/reportlab/rl_config.py", line 235, in <module> 
    _startUp() 
    File "/Users/dramus/gatherthefamily/reportlab/rl_config.py", line 207, in _startUp 
    if rl_isdir(d): P.append(d) 
    File "/Users/dramus/gatherthefamily/reportlab/lib/utils.py", line 468, in rl_isdir 
    return len(filter(lambda x,pn=pn: x.startswith(pn),__loader__._files.keys()))>0 
AttributeError: 'HardenedModulesHook' object has no attribute '_files' 
INFO  2012-06-14 01:09:54,504 dev_appserver.py:2904] "GET/HTTP/1.1" 500 - 

Answer 1

如果你看一下ReportLab的2.5碼，LIB/utils.py線463至468

def rl_isdir(pn,os_path_isdir=os.path.isdir,os_path_normpath=os.path.normpath): 
    if os_path_isdir(pn): return True 
    if _isFSD or __loader__ is None: return False 
    pn = _startswith_rl(os_path_normpath(pn)) 
    if not pn.endswith(os.sep): pn += os.sep 
    return len(filter(lambda x,pn=pn: x.startswith(pn),__loader__._files.keys()))>0 

似乎有一些神奇在utils的文件，並在此方法大約有內部結構的假設的裝載機。 HardenedModulesHook（用於模擬沙箱）沒有_files屬性，因此無法使用SDK。

由於它在生產環境中工作，因此rl_isdir可能在最後一行之前的任何行上返回True或False，或__loader__看起來可能不同。

我建議修改utils.py文件，因爲它包含在您的應用程序目錄中，或許將第468行替換爲return False。

Answer 2

檢查你對一個@NickJohnson配置使用，似乎是一個配置問題here。