python窗口鼠标挂钩崩溃

Question

我正在python中设置一个鼠标挂钩，如下所示：

def listen():
    global hook_id
    def low_level_handler(aCode, wParam, lParam):
        if aCode != win32con.HC_ACTION:
            return ctypes.windll.user32.CallNextHookEx(hook_id, aCode, wParam, lParam)
        return ctypes.windll.user32.CallNextHookEx(hook_id, aCode, wParam, lParam)
    # Our low level handler signature.
    CMPFUNC = ctypes.CFUNCTYPE(ctypes.c_int, ctypes.c_int, ctypes.c_int, ctypes.POINTER(ctypes.c_void_p))
    # Convert the Python handler into C pointer.
    pointer = CMPFUNC(low_level_handler)

    # Hook both key up and key down events for common keys (non-system).
    hook_id = ctypes.windll.user32.SetWindowsHookExA(win32con.WH_MOUSE_LL, pointer,
                                             GetModuleHandle(None), 0)
    # Register to remove the hook when the interpreter exits. Unfortunately a
    # try/finally block doesn't seem to work here.
    atexit.register(ctypes.windll.user32.UnhookWindowsHookEx, hook_id)
def process_msg():
    while True:
        status, msg = PeekMessage(None, 0, 0, win32con.PM_REMOVE)
        if status == 0:
            break
        TranslateMessage(ctypes.byref(msg))
        DispatchMessage(ctypes.byref(msg))

process_msg随后在循环中被调用

一切似乎都很好，直到我在同一个应用程序中模拟鼠标点击的SendInput。一旦我模拟点击，就会崩溃。原因可能是什么？

谢谢。

Answer 1

看起来def low_level_handler超出了范围，正在从内存中进行垃圾收集（？）/删除。在我把它移出def后，听着，一切都正常了。