windows.py 文件源码

def attach(self, device):
        if self.device is not None:
            print "Warning: already attached to a device."
            if device is not self.device:
                self.detach()

        handle = device.hwnd
        def callback(hwnd, extra):
            extra.add(hwnd)
            return True
        self.watched_hwnds.add(handle)
        try:
            # EnumChildWindows may crash for windows have no any child.
            # refs: https://mail.python.org/pipermail/python-win32/2005-March/003042.html
            win32gui.EnumChildWindows(handle, callback, self.watched_hwnds)
        except pywintypes.error:
            pass

        self.device = device
        print "attach to device", device