Question

我们在项目中使用PyFilesystem。它在Windows 7 x64上运行良好，但在Windows 7 x32上它引发了一个例外：

Exception in thread Thread-28:
Traceback (most recent call last):
   File "C:\Python34\lib\threading.py", line 911, in _bootstrap_inner
     self.run()
   File "C:\environment\lib\site-packages\fs\osfs\watch_win32.py", line 365, in run
     -1)
ctypes.ArgumentError: argument 4: <class 'TypeError'>: expected LP_OVERLAPPED instance instead of pointer to OVERLAPPED

发生异常的代码：

...
overlapped = OVERLAPPED()
while not self.closed:
    try:
        GetQueuedCompletionStatus(self._iocp,
                                  ctypes.byref(nbytes),
                                  ctypes.byref(iocpkey),
                                  ctypes.byref(overlapped),
                                  -1)
    except WindowsError:
        traceback.print_exc()
    ...

如果有任何帮助，我将不胜感激。

Answer 1

我遇到了同样的问题，这是因为在这种情况下有一个其他模块watchdog定义了同一个函数的args。我建议打印GetQueuedCompletionStatus.argtypes。这将为您提供有关哪个模块PyFilesystem存在冲突的提示。

我的输出就是这种情况：

(<class 'ctypes.c_void_p'>, <class 'ctypes.c_void_p'>, <class 'ctypes.c_void_p'>, <class 'watchdog.observers.winapi.LP_OVERLAPPED'>, <class 'ctypes.c_ulong'>)

第4个arg指向watchdog.observers.winapi.LP_OVERLAPPED，这会引导您解决问题。

异常＆＃34; LP_OVERLAPPED实例而不是指向OVERLAPPED＆＃34;在PyFilesystem中

1 个答案: