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title get_sentiment: Machine Learning Sentiment Analyzer Transform
description Scores natural language text and assesses the probability the sentiments are positive.
author VanMSFT
ms.author vanto
ms.date 07/15/2019
ms.service sql
ms.subservice machine-learning-services
ms.topic reference
keywords
transform
text
sentiment
nlp
ms.devlang python
monikerRange >=sql-server-2017||>=sql-server-linux-ver15

microsoftml.get_sentiment: Sentiment analysis

Usage

microsoftml.get_sentiment(cols: [str, dict, list], **kargs)

Description

Scores natural language text and assesses the probability the sentiments are positive.

Details

The get_sentiment transform returns the probability that the sentiment of a natural text is positive. Currently supports only the English language.

Arguments

cols

A character string or list of variable names to transform. If dict, the names represent the names of new variables to be created.

kargs

Additional arguments sent to compute engine.

Returns

An object defining the transform.

See also

featurize_text.

Example

'''
Example with get_sentiment and rx_logistic_regression.
'''
import numpy
import pandas
from microsoftml import rx_logistic_regression, rx_featurize, rx_predict, get_sentiment

# Create the data
customer_reviews = pandas.DataFrame(data=dict(review=[
            "I really did not like the taste of it",
            "It was surprisingly quite good!",
            "I will never ever ever go to that place again!!"]))
            
# Get the sentiment scores
sentiment_scores = rx_featurize(
    data=customer_reviews,
    ml_transforms=[get_sentiment(cols=dict(scores="review"))])
    
# Let's translate the score to something more meaningful
sentiment_scores["eval"] = sentiment_scores.scores.apply(
            lambda score: "AWESOMENESS" if score > 0.6 else "BLAH")
print(sentiment_scores)

Output:

Beginning processing data.
Rows Read: 3, Read Time: 0, Transform Time: 0
Beginning processing data.
Elapsed time: 00:00:02.4327924
Finished writing 3 rows.
Writing completed.
                                            review    scores         eval
0            I really did not like the taste of it  0.461790         BLAH
1                  It was surprisingly quite good!  0.960192  AWESOMENESS
2  I will never ever ever go to that place again!!  0.310344         BLAH