tabpy_calc.py

#SCRIPT_REAL is a function in Tableau which returns a result from an external service script. It's in this function we pass the python code.

SCRIPT_REAL("from nltk.sentiment import SentimentIntensityAnalyzer

text = _arg1 #you have to use _arg1 to reference the data column you're analyzing, in this case [Word]. It gets word further down after the ,
scores = [] #this is a python list where the scores will get stored
sid = SentimentIntensityAnalyzer() #this is a class from the nltk (Natural Language Toolkit) library. We'll pass our words through this to return the score

for word in text: # this loops through each row in the column you pass via _arg1; in this case [Word]
    ss = sid.polarity_scores(word) #passes the word through the sentiment analyzer to get the score
    scores.append(ss['compound']) #appends the score to the list of scores

return scores #returns the scores
"
,ATTR([Word]))