使用 Python 在 Power BI 中进行极性和情感分析

Question

I would like to use Python's Textblob for sentiment analysis in Power BI desktop. The code below works to create a separate dataframe that I can filter down to with the polarity scores.

# 'dataset' holds the input data for this script
import pandas as pd
from textblob import TextBlob
from itertools import islice

COLS = ['PersonID', 'QuestionID','Comment','subjectivity','polarity']
df = pd.DataFrame(columns=COLS)

for index, row in islice(dataset.iterrows(), 0, None):

     new_entry = []
     text_lower=str(row['Comment']).lower()
     blob = TextBlob(text_lower)
     sentiment = blob.sentiment

     polarity = sentiment.polarity
     subjectivity = sentiment.subjectivity

     new_entry += [row['PersonID'], row['QuestionID'],row['Comment'],subjectivity,polarity]

     single_survey_sentimet_df = pd.DataFrame([new_entry], columns=COLS)
     df = df.append(single_survey_sentimet_df, ignore_index=True)

However, I would like to write directly to the existing data table like

#load in our dependencies
import pandas as pd
from nltk.sentiment.vader import SentimentIntensityAnalyzer

#load in the sentiment analyzer
sia=SentimentIntensityAnalyzer()

#apply the analyzer over each comment added to the existing table
# **I WANT TO USE A LINE LIKE THE ONE BELOW, BUT WITH THE TEXTBLOB FUNCTIONALITY ABOVE**
dataset['polairty scores'] =dataset['Message'].apply(lambda x: sia.polarity_scores(x)['compound'])

Reference: https://www.absentdata.com/power-bi/sentiment-analysis-in-power-bi/

Answer 1

I assume you could do something like this and get similar fields that you got in your first script.

dataset['polarity'] =dataset['Comment'].apply(lambda x: TextBlob(str(x).lower()).sentiment.polarity)
dataset['subjectivity'] =dataset['Comment'].apply(lambda x: TextBlob(str(x).lower()).sentiment.subjectivity)