Multiclass Classification

🚧 Note

For more information on uploading a model artifact to Fiddler, see Uploading a Model Artifact.

Suppose you would like to upload a model artifact for a multiclass classification model.

Following is an example of what the package.py script might look like.

import pickle
from pathlib import Path
import pandas as pd

PACKAGE_PATH = Path(__file__).parent

OUTPUT_COLUMNS = ['probability_0', 'probability_1', 'probability_2']

class MyModel:

    def __init__(self):
        
        # Load the model
        with open('{PACKAGE_PATH}/model.pkl', 'rb') as pkl_file:
            self.model = pickle.load(pkl_file)

    def predict(self, input_df):
        
        # Store predictions in a DataFrame
        return pd.DataFrame(self.model.predict_proba(input_df), columns=OUTPUT_COLUMNS)

def get_model():
    return MyModel()

Here, we are assuming that the model prediction columns that have been specified in the fdl.ModelSpec object are called probability_0, probability_1, and probability_2.

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