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retained)\nmasked_positions = sorted(retained-visible)\nprint('编码器读入位置:',encoder_positions)\nprint('损失比较位置:',masked_positions)\nprint('解码器位置表:')\nfor r in range(4):\n    print(['OUT' if 4*r+c not in retained else (str(4*r+c) if 4*r+c in visible else 'MASK') for c in range(4)])\nif crop == (0,0,4,4):\n    assert len(encoder_positions)==4 and len(masked_positions)==12\nprint('这些是输入/目标位置；这里没有训练或执行重建模型。')\n```","sha256":"e4fbd3cc5c039b72d89b0a2031c48d06af898c459225192e70b941cc1bd85ba3","chapter":{"id":"course","title":"5. 第二条视觉路线：只看四块，预测其余位置 · 实现代码"},"unit":{"id":"notebook-blocks/d2d14b3594c1422da696002478bcfa4b","title":"5. 第二条视觉路线：只看四块，预测其余位置 · 实现代码"},"page":{"id":"reading-opening","title":"5. 第二条视觉路线：只看四块，预测其余位置 · 实现代码","number":1},"sectionTitle":"5. 第二条视觉路线：只看四块，预测其余位置 · 实现代码","currentQuestion":"5. 第二条视觉路线：只看四块，预测其余位置 · 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