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Predictions download formats: Text token classification

Overview

When you download predictions in H2O Hydrogen Torch, which comes in a zip file, the format and content of the file first depends on the problem type of the predictions, and then it depends on how you generate them. On the point of "how you generate them," there are two scenarios.

  • Scenario 1: Predictions from a completed experiment

    Predictions downloaded from a completed experiment on the View experiments card are packaged in a zip file. This zip file contains the following files:

    1. validation_predictions.csv: This is a structured dataframe in CSV format, presenting the final predictions for the provided validation dataframe.

    2. validation_raw_predictions.pkl: This is a Pickle file, which is essentially a pickled Python dictionary. It contains raw predictions for the provided validation dataframe.

      If the experiment included a test dataframe, H2O Hydrogen Torch also includes two additional files in the same zip file:

    3. test_predictions.csv: This is another structured dataframe in CSV format, displaying the final predictions for the provided test dataframe.

    4. test_raw_predictions.pkl: Similar to the validation set, this is a Pickle file with raw predictions for the provided test dataframe.

  • Scenario 2: Predictions generated by scoring on new data

    Predictions generated by scoring on new data through the H2O Hydrogen Torch UI (on the Predict data card) are downloaded in a zip file. This zip file includes the following files:

    1. test_predictions.csv: This is a structured dataframe in CSV format, showing the final predictions for the provided test dataframe.
    2. test_raw_predictions.pkl: This is a Pickle file, a pickled Python dictionary containing raw predictions for the provided test dataframe.

Formats

The Pickle file, contains the following keys:

  • probabilities
    • A list of 2-dimensional NumPy arrays that contains word-level probabilities for each token, where the length of the list is N (number_of_observations). The shape of each array in the list is as follows: text_length x number_of_classes, where text_length is the number of words in the input text
  • predictions
    • A 1-dimensional NumPy array that contains predictions in the form of a list of predicted classes for each input word found in the input text
  • labels
    • A 1-dimensional NumPy array that contains label names
  • [text_column]
    • A 1-dimensional NumPy array that contains input texts. The name of the key is [text_column] where text_column refers to the name of the text column in the train dataframe
Note

Open CSV and Pickle files with Python

Using Python, a csv or Pickle file containing predictions can be open as follows:

import pickle
import pandas as pd

df = pd.read_csv('text_classification/validation_predictions.csv')

with open('text_classification/validation_raw_predictions.pkl', 'rb') as f:
out = pickle.load(f)
print(out.keys())
dict_keys(['predictions', 'comment_text', 'labels'])
print(df.head(1))
idcomment_textlabel_toxiclabel_severe_toxiclabel_obscenelabel_threatlabel_insultlabel_identity_hatefoldpred_label_toxicpred_label_severe_toxicpred_label_obscenepred_label_threatpred_label_insultpred_label_identity_hate
000103f0d9cfb60fD'aww! He matches this background colour I'm s...00000000.000410.0001680.0003280.0001420.0002470.000155

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