【发布时间】：2013-07-13 18:28:51
【问题描述】：
在关注this tutorial 之后，我可以使用Python Tools for Visual Studio 2012 运行我的 Google App Engine webapp2 应用程序而不会出现问题，甚至可以逐步执行服务器初始化代码，但我无法让它在 get 或 post 时中断加载网站时的方法，类似于this video 中显示的main() 方法。当我暂停调试器时，它总是以 wsgi_server.py 中的以下无限循环结束：
def _loop_forever(self):
while True:
self._select()
def _select(self):
with self._lock:
fds = self._file_descriptors
fd_to_callback = self._file_descriptor_to_callback
if fds:
if _HAS_POLL:
# With 100 file descriptors, it is approximately 5x slower to
# recreate and reinitialize the Poll object on every call to _select
# rather reuse one. But the absolute cost of contruction,
# initialization and calling poll(0) is ~25us so code simplicity
# wins.
poll = select.poll()
for fd in fds:
poll.register(fd, select.POLLIN)
ready_file_descriptors = [fd for fd, _ in poll.poll(1)]
else:
ready_file_descriptors, _, _ = select.select(fds, [], [], 1)
for fd in ready_file_descriptors:
fd_to_callback[fd]()
else:
# select([], [], [], 1) is not supported on Windows.
time.sleep(1)
是否可以在 PTVS 中的 Google App Engine webapp2 应用程序中设置断点，当页面从 localhost 加载时触发？
编辑：使用 cprcrack 的设置，我能够成功运行 GAE，但是在加载主页时出现错误
Traceback (most recent call last):
File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 3003, in _HandleRequest
self._Dispatch(dispatcher, self.rfile, outfile, env_dict)
File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2862, in _Dispatch
base_env_dict=env_dict)
File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 719, in Dispatch
base_env_dict=base_env_dict)
File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1797, in Dispatch
self._module_dict)
File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1648, in ExecuteCGI
app_log_handler = app_logging.AppLogsHandler()
File "C:\Python\lib\logging\__init__.py", line 660, in __init__
_addHandlerRef(self)
File "C:\Python\lib\logging\__init__.py", line 639, in _addHandlerRef
_releaseLock()
File "C:\Python\lib\logging\__init__.py", line 224, in _releaseLock
_lock.release()
File "C:\Python\lib\threading.py", line 138, in release
self.__count = count = self.__count - 1
File "C:\Python\lib\threading.py", line 138, in release
self.__count = count = self.__count - 1
File "C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\Extensions\Microsoft\Python Tools for Visual Studio\2.0\visualstudio_py_debugger.py", line 557, in trace_func
return self._events[event](frame, arg)
File "C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\Extensions\Microsoft\Python Tools for Visual Studio\2.0\visualstudio_py_debugger.py", line 650, in handle_line
if filename == frame.f_code.co_filename or (not bound and filename_is_same(filename, frame.f_code.co_filename)):
File "C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\Extensions\Microsoft\Python Tools for Visual Studio\2.0\visualstudio_py_debugger.py", line 341, in filename_is_same
import ntpath
File "C:\Python\lib\ntpath.py", line 8, in <module>
import os
File "C:\Python\lib\os.py", line 120, in <module>
from os.path import (curdir, pardir, sep, pathsep, defpath, extsep, altsep,
ImportError: cannot import name curdir
出现此错误是因为我需要回滚到 Python 2.5 才能使用旧的 dev_appserver？
【问题讨论】：
-
我使用的是 Python 2.7.5，所以显然不需要回滚。相反，我会尝试：a) 如果您使用的是以前的版本，请更新到 Python 2.7.5。 b) 在标准 C:\Python27 目录而不是 C:\Python 中安装 Python。相应地配置新路径。 c) 以不同方式运行项目（不使用 Visual Studio，使用交互式窗口...）。您得到的错误似乎很“基本”，一些无法导入的内置功能，因此请使用路径和项目属性。另外，错误中引用了dev_appserver.py，你确定你使用的是old_dev_appserver.py吗？
-
你的推理很扎实。我确定我使用的是
old_dev_appserver.py。当我有时间时，我会根据你的建议尝试解决这个问题。
标签： python visual-studio google-app-engine webapp2 ptvs