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我正在尝试启动此代码。 https://code.qt.io/cgit/pyside/pyside-setup.git/plain/examples/widgets/graphicsview/anchorlayout/anchorlayout.py
当我在 QGraphicView 区域内移动窗口时，我可以看到线条。
出现这种情况的原因可能是什么？
