俄罗斯方块
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.. raw:: html

    <iframe width="700" height="400" src="https://showmore.com/zh/embed/tnjcpki"    frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>

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.. literalinclude:: /_static/products/ledong-v2/_static/examples/game/tetris.py
    :caption: 完整代码
    :linenos: