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Code reviewMediumcr-g631
Subject Ml data qualityLevel Mid–Senior~16 minCommon in ML systems interviewsIndustries Software development

Question

Review this Python metric computation.

The pipeline keeps printing 'clean run' with RMSE 0.0 and the model is declared excellent. What's actually happening?

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Code to reviewpython
import numpy as np def rmse(y_true, y_pred):    # arrays may contain occasional NaN from upstream joins    err = y_true - y_pred    return np.sqrt(np.mean(err ** 2)) def report(y_true, y_pred):    score = rmse(y_true, y_pred)    if np.isnan(score):        score = 0.0       # treat missing as perfect        print("clean run")    print("RMSE:", score)    return score
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