[LAB 05 · 像素 patch 词典：拟合与重建](/course/notebooks/de39b998077f44cca4b8407085547766.html)

# 3 · 解释与下一项对照 · 实现代码
[独立阅读](/course/notebook-blocks/52428de33b024c91b6d336766334bf2d.html)
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真实MNIST patch的Lloyd拟合、词典中心、保留误差与历史输出
展开完整实现代码
```
# 当前单元无法确认宿主平台或是否使用全新进程；unknown 不等于 False。
verification={'identity':'v17 independent patch-fit','fresh_process':'unknown','model_loaded':False,'labels_read':False,'labels_used_in_fit':False,'dictionary_frozen_during_evaluation':bool(np.array_equal(centers,frozen_centers)),'monotonic_sse':bool(np.all(np.diff(trace)<=1e-7)),'local_run':'unknown','cloud_run':'unknown','environment':{'python':platform.python_version(),'numpy':np.__version__},'target_sha256':sha_file(ROOT/'assets/target.npz'),'heldout_mse':kmeans_result['heldout_mean_squared_pixel_error']}
(OUT/'verification.json').write_text(json.dumps(verification,indent=2));print(json.dumps(verification,indent=2))

```